{"title":"F9X X5M \u0026 X6M Engines \u0026 Engine Components","description":"","products":[{"product_id":"dc526-2460-valve-spring-kit-s63-high-performance-valve-springs","title":"S63 High Performance Valve Spring Kit | BMW F9X M5\/M6\/M8\/X5M\/X6M","description":"\u003cp\u003e \u003c\/p\u003e\n\u003cdiv\u003e\n\u003cdiv\u003e\n\u003cp\u003e\u003cmeta charset=\"utf-8\"\u003e\u003cspan\u003eWe include high performance valve springs with our engine, however you can purchase the springs separately. Our springs increase valve spring pressure by 20%. We also keep the steel retainers for long term durability.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eSteve Dinan has been building racing and high performance road car engines for over 40 years. We are concerned about the trend in high performance valve springs on the new S63 engines. Companies are selling springs with very high spring rates that will rob power and dramatically increase valve train wear.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch5\u003eTheory\u003c\/h5\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003eThe goal of a valve spring pressure is to make it as low as possible. This is because compressing a spring takes energy and robs potential power. In addition, more valve spring pressure increases valve train wear. We work very hard at running just enough valve spring pressure to keep the follower in contact with the camshaft but no more. If you increase the RPM you increase the valve spring just enough to manage the inertia from the increased RPM. The valve spring also needs enough seat pressure and the correct frequency not to bounce when the valve is closed. This is to avoid leaking trapped mass (the fuel air charge).\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch5\u003eBoosted Engine\u003c\/h5\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003eWith a boosted engine you will need a slight increase in pressure to push back against the boost pressure in the intake trying to hold the valve open. This amount of pressure added is much less than the pressure to control the inertia of the valve train.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003ch5\u003eConclusion\u003c\/h5\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cp\u003eIf you double the boost pressure you do not need to double the spring pressure since only about 20% of the spring pressure is to control the boost pressure and 80% is to control the valve train mass. An additional 20% of valve spring pressure is all you need to run.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty \u0026amp; Additional Information\u003c\/strong\u003e\u003cbr\u003eOur engines are very strong and can often be very reliable even at power levels above what is recommended. The durability usually depends on the quality and the reliability of the tune and other aftermarket components added to the engine management system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eEngines with CarBahn Software Tunes\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eAll engines listed with a stage number are designed to be road car engines and are covered for 2 years, 24,000 miles providing they have a CarBahn tune and there are no other parts on the car that have caused a premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eEngines with Another Company's Tune\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003eAll engines listed with a stage number are designed to be road car engines and are covered are covered for 2 year, 24,000 miles providing they you stay under our recommended torque limits. Torque limits are indicated on our web site. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure. \u003cspan\u003eIf Torque limit is exceeded the warranty is for materials and workmanship only.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eRacing Engines\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eRacing engines are designed to be raced and are covered for materials and workmanship only. Racing engines should be rebuilt periodically based on run time or mileage. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-is-last-node=\"\" data-end=\"939\" data-start=\"793\"\u003e \u003c\/p\u003e\n\u003cp\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/l1l5J-j82eQ?si=rLiHp2pCf_u4KXY0\" title=\"YouTube video player\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c!----\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":49259646746941,"sku":"DC526-2460","price":795.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/S63-Valve-Springs-2-scaled-1.jpg?v=1724164841"},{"product_id":"stage-2-s63-high-performance-engine-bmwm5-m6-x5m-x6m","title":"Stage 2 S63 High Performance Engine | BMW F1X M5\/M6\/X5M\/X6M","description":"\u003cp data-start=\"0\" data-end=\"494\"\u003eThe CarBahn ST2 S63 engine is rated for up to 1,000 lb-ft of torque. It’s designed to improve durability for high-output tunes, making it an excellent alternative to an OEM factory remanufactured engine. We use high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, a high-performance head gasket, and cylinder head studs. The compression is lowered by 0.5 to maximize power for higher boost settings without risking detonation issues.\u003c\/p\u003e\n\u003cp data-start=\"496\" data-end=\"991\"\u003eThe CarBahn S63 engine is both stronger and more affordable than the BMW OEM factory engine, making it the perfect choice for BMW S63 performance enthusiasts. Steve Dinan's engine shop, with 46 years of experience, has built engines that have won numerous championships, including three prototype racing championships and two overall wins in the 24 Hours of Daytona (2011-2013). You won’t find a higher-quality engine from any other BMW tuning company. All engines come with a two-year warranty.\u003c\/p\u003e\n\u003cp data-start=\"1102\" data-end=\"1187\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eExperience the power and performance of S63 engine tuning at its finest with CarBahn.\u003c\/p\u003e\n\u003cp data-start=\"514\" data-end=\"791\"\u003eThe stock S63 engine’s high compression ratio limits performance at higher boost levels. CarBahn’s engine reduces compression by 0.5 to optimize for more boost and enhance drivability on pump gas, while also reducing catalyst inlet temperatures for emissions-legal street cars.\u003c\/p\u003e\n\u003cp data-start=\"793\" data-end=\"1057\" data-is-last-node=\"\"\u003eWith over 40 years of experience, Steve Dinan, a renowned BMW tuning company, has built racing engines with over 1,300hp in S63 engines and 1,000hp in S55 engines. CarBahn delivers exceptional BMW S63 engine tuning to push your BMW’s performance to the next level.\u003c\/p\u003e\n\u003cp\u003e\u003ciframe title=\"YouTube video player\" src=\"https:\/\/www.youtube.com\/embed\/WSHusoVQm8o?si=kichssZ9qDH35PTY\" height=\"315\" width=\"560\"\u003e\u003c\/iframe\u003e\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp data-is-last-node=\"\" data-end=\"939\" data-start=\"793\"\u003e \u003c\/p\u003e","brand":"CarBahn","offers":[{"title":"Stock Compression","offer_id":49286122766653,"sku":"CBB06-08-8022","price":25995.0,"currency_code":"USD","in_stock":true},{"title":"Low Compression","offer_id":49286122799421,"sku":"CB263-6002-LC","price":25995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/stage-2-s63.jpg?v=1762365195"},{"product_id":"stage-2-s63-high-performance-engine-tu4-bmw-x5m-x6m","title":"Stage 1 S63 High Performance Engine (TU4) | BMW F9X X5M\/X6M","description":"\u003cp\u003eStage 2 S63 TU4 High Performance Engine: F95 X5M \u0026amp; F96 X6M\u003c\/p\u003e\n\u003cp data-start=\"0\" data-end=\"494\"\u003eThe CarBahn ST2 S63 engine is rated for 1,000+ lb-ft of torque. It’s designed to improve durability for high-output tunes, making it an excellent alternative to an OEM factory remanufactured engine. We use high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, a high-performance head gasket, and cylinder head studs. The compression is lowered by 0.5 to maximize power for higher boost settings without risking detonation issues.\u003c\/p\u003e\n\u003cp data-start=\"496\" data-end=\"991\"\u003eThe CarBahn S63 engine is both stronger and more affordable than the BMW OEM factory engine, making it the perfect choice for BMW S63 performance enthusiasts. Steve Dinan's engine shop, with 46 years of experience, has built engines that have won numerous championships, including three prototype racing championships and two overall wins in the 24 Hours of Daytona (2011-2013). You won’t find a higher-quality engine from any other BMW tuning company. All engines come with a two-year warranty.\u003c\/p\u003e\n\u003cp data-start=\"1102\" data-end=\"1187\" data-is-last-node=\"\" data-is-only-node=\"\"\u003eExperience the power and performance of S63 engine tuning at its finest with CarBahn.\u003c\/p\u003e\n\u003cp\u003eSteve Dinan has been building high performance and racing engines for BMW since 1977, winning 11 racing championships including 3 prototype championships and two 24 Hours of Daytona. The same engine shop that builds the racing engines also builds the street car engines. These talented engineers, machinists, and builders have built hundreds of engines from OEM street rebuilds to full-blown racing engines.\u003c\/p\u003e\n\u003cp\u003eFrom stock, the S63 engine is not designed for a large increase in boost. CarBahn has designed a high-performance engine to handle very high outputs by utilizing higher quality racing Carrillo connecting rods and forged CP pistons.\u003c\/p\u003e\n\u003cp\u003eFor our Stage 2 engines, high performance direct injection camshafts are reground to increase the stroke on the direct injection pump to increase fuel flow for higher boost levels. We also port and polish the cylinder heads.\u003c\/p\u003e\n\u003cp\u003eThe stock engine compression ratio is relatively high due to the Corporate Average Fuel Economy (CAFE) standards which push for consistently higher fuel economy in cars and trucks. However, this increased compression limits engine performance with higher boost settings by decreasing the size of the fuel-air charge in the combustion chamber, forcing the ignition timing to retard far below MBT (Mean Best Timing, the theoretical optimal ignition timing). Therefore, the Carbahn Autoworks S63 engine has 0.5 less compression to optimize the engine for the increased boost. In an emissions-legal street car, the lowered compression has the added benefit of reducing catalyst inlet temperatures and improved drive-ability on pump gas.\u003cspan style=\"font-size: large;\"\u003e\u003cb\u003e\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e","brand":"CarBahn","offers":[{"title":"Stock Compression","offer_id":49286180372797,"sku":"CBB06-08-5112","price":24995.0,"currency_code":"USD","in_stock":true},{"title":"Low Compression","offer_id":49286180405565,"sku":"CB463-6004-LOWCOMPRESSION","price":24995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/stage-1-s63.jpg?v=1762365125"},{"product_id":"stage-1-s63-high-performance-engine-bmw-m5-m6x5m-x6m","title":"Stage 1 S63 High Performance Engine | BMW F9X M5\/M6\/X5M\/X6M","description":"\u003cp data-start=\"0\" data-end=\"549\"\u003eThe CarBahn ST1 S63 engine is rated for up to 850 lb-ft of torque. It is designed to improve durability for medium-output tunes, making it an excellent alternative to an OEM factory remanufactured engine, especially if your original engine has failed and is no longer under warranty. We utilize high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, and a high-performance head gasket. This engine maintains the stock compression ratio, ensuring excellent drivability and fuel economy.\u003c\/p\u003e\n\u003cp data-start=\"551\" data-end=\"1044\"\u003eThe CarBahn S63 engine is both stronger and more affordable than the BMW OEM factory engine, making it the ideal choice for BMW S63 performance enthusiasts. Steve Dinan's engine shop, with 46 years of experience, has built engines that have won numerous championships, including three prototype racing championships and two overall wins in the 24 Hours of Daytona (2011-2013). You won’t find a higher-quality engine from any other BMW tuning company. All engines come with a two-year warranty.\u003c\/p\u003e\n\u003cp data-start=\"551\" data-end=\"1044\"\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eExperience the power and performance of S63 engine tuning with CarBahn.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe S63 engine is not designed to have large increase in boost. CarBahn has designed a high-performance engine to handle very high outputs by utilizing higher quality racing components. This engine includes higher quality racing Forged Carrillo connecting rods, CP forged pistons and CarBahn high-performance valve springs. This Engine includes a complete rebuild with a valve job, timing chains, chain guides, tensioners, water pump thermostat, new bearings, seals and gaskets.\u003c\/p\u003e\n\u003cp\u003eThe stock high compression ratio is high for CAFÉ. (Corporate average fuel economy). However, this increased compression limits engine performance with higher boost setting by decreasing the size of the fuel air charge in the combustion chamber and by forcing the ignition timing to retard far below MBT (mean best timing). The CarBahn engine has .5 less compression to optimize the engine for the increased boost. If this an emissions legal street car the lowered compression has the added benefit of reducing catalyst inlet temperatures and improved drivability on pump gas.\u003c\/p\u003e\n\u003ch5\u003eCarBahn History\u003c\/h5\u003e\n\u003cp\u003eSteve Dinan has been building high performance and racing engines for BMW’s since 1977! Winning 12 racing championships including 3 prototype championships and two - 24 hours of Daytona. The same engine shop that builds the racing engines also builds the street car engines. This group of talented engineers, Engine machinist and engine builders has built hundreds of engines. From rebuilds to developing engines making over 625hp on an S65 and over 740hp on an S85.\u003c\/p\u003e\n\u003cp\u003e\u003cspan style=\"font-size: large;\"\u003e\u003cb\u003eEngine core acceptance parameters\u003c\/b\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eMust be complete core (factory engine, from oil pan to valve cover)\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eBlock must have no:\n\u003cul\u003e\n\u003cli\u003eHoles or cracks in casting\u003c\/li\u003e\n\u003cli\u003eHoles or crack in covers\u003c\/li\u003e\n\u003cli\u003eBore damage that cannot be honed out\u003c\/li\u003e\n\u003cli\u003eThrust surface damage\u003c\/li\u003e\n\u003cli\u003eJournal surfaces damage\u003c\/li\u003e\n\u003cli\u003eBolt hole damage that can’t be repaired\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eHeads must have no:\n\u003cul\u003e\n\u003cli\u003eHoles or cracks in casting\u003c\/li\u003e\n\u003cli\u003eHoles or crack in covers\u003c\/li\u003e\n\u003cli\u003eThrust surface damage\u003c\/li\u003e\n\u003cli\u003eJournal surfaces damage\u003c\/li\u003e\n\u003cli\u003eBolt hole damage that can’t be repaired\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003cli\u003eAdditional repair charges could apply for damaged items that are not normally changed during an overhaul and cannot be repaired or serviced\n\u003cul\u003e\n\u003cli\u003eValves\u003c\/li\u003e\n\u003cli\u003eCrankshafts\u003c\/li\u003e\n\u003cli\u003eCamshafts\u003c\/li\u003e\n\u003cli\u003eGuides\u003c\/li\u003e\n\u003cli\u003eValveTronic mechanism\u003c\/li\u003e\n\u003cli\u003eVanos mechanism\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003ehttps:\/\/www.youtube.com\/watch?v=WSHusoVQm8o\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003e\u003cstrong\u003eWarranty \u0026amp; Additional Information\u003c\/strong\u003e\u003cbr\u003eOur engines are very strong and can often be very reliable even at power levels above what is recommended. The durability usually depends on the quality and the reliability of the tune and other aftermarket components added to the engine management system.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eEngines with CarBahn Software Tunes\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eAll engines listed with a stage number are designed to be road car engines and are covered for 2 years, 24,000 miles providing they have a CarBahn tune and there are no other parts on the car that have caused a premature failure.\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eEngines with Another Company's Tune\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003e\u003cmeta charset=\"utf-8\"\u003e\n\u003cp\u003eAll engines listed with a stage number are designed to be road car engines and are covered are covered for 2 year, 24,000 miles providing they you stay under our recommended torque limits. Torque limits are indicated on our web site. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure. \u003cspan\u003eIf Torque limit is exceeded the warranty is for materials and workmanship only.\u003c\/span\u003e\u003c\/p\u003e\n\u003c\/li\u003e\n\u003cli\u003e\n\u003cem\u003e\u003cstrong\u003eRacing Engines\u003c\/strong\u003e\u003c\/em\u003e\u003cbr\u003eRacing engines are designed to be raced and are covered for materials and workmanship only. Racing engines should be rebuilt periodically based on run time or mileage. Warranty does not cover failures from the tune or aftermarket fuel injection components that caused the failure. It is CarBahn full discretion to determine cause of failure. \u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp data-is-last-node=\"\" data-end=\"939\" data-start=\"793\"\u003e \u003c\/p\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":49291465425213,"sku":"CBB06-08-8012","price":24995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/stage-1-s63.jpg?v=1762365125"},{"product_id":"stage-1-s63-high-performance-engine-tu4-bmw-x5m-x6m","title":"Stage 1 S63 High Performance Engine (TU4) | BMW F9X X5M\/X6M","description":"\u003cp\u003eStage 1 S63 TU4 High Performance Engine: F95 X5M \u0026amp; F96 X6M\u003c\/p\u003e\n\u003cp data-end=\"494\" data-start=\"0\"\u003eThe CarBahn ST2 S63 engine is rated for up to 1,000 lb-ft of torque. It’s designed to improve durability for high-output tunes, making it an excellent alternative to an OEM factory remanufactured engine. We use high-quality racing components, including Carrillo connecting rods, forged CP pistons, high-performance valve springs, a high-performance head gasket, and cylinder head studs. The compression is lowered by 0.5 to maximize power for higher boost settings without risking detonation issues.\u003c\/p\u003e\n\u003cp data-end=\"991\" data-start=\"496\"\u003eThe CarBahn S63 engine is both stronger and more affordable than the BMW OEM factory engine, making it the perfect choice for BMW S63 performance enthusiasts. Steve Dinan's engine shop, with 46 years of experience, has built engines that have won numerous championships, including three prototype racing championships and two overall wins in the 24 Hours of Daytona (2011-2013). You won’t find a higher-quality engine from any other BMW tuning company. All engines come with a two-year warranty.\u003c\/p\u003e\n\u003cp data-is-only-node=\"\" data-is-last-node=\"\" data-end=\"1187\" data-start=\"1102\"\u003eExperience the power and performance of S63 engine tuning at its finest with CarBahn.\u003c\/p\u003e\n\u003cp\u003eSteve Dinan has been building high performance and racing engines for BMW since 1977, winning 11 racing championships including 3 prototype championships and two 24 Hours of Daytona. The same engine shop that builds the racing engines also builds the street car engines. These talented engineers, machinists, and builders have built hundreds of engines from OEM street rebuilds to full-blown racing engines.\u003c\/p\u003e\n\u003cp\u003eFrom stock, the S63 engine is not designed for a large increase in boost. CarBahn has designed a high-performance engine to handle very high outputs by utilizing higher quality racing Carrillo connecting rods and forged CP pistons.\u003c\/p\u003e\n\u003cp\u003eFor our Stage 1 engines, high performance direct injection camshafts are reground to increase the stroke on the direct injection pump to increase fuel flow for higher boost levels. We also port and polish the cylinder heads.\u003c\/p\u003e\n\u003cp\u003eThe stock engine compression ratio is relatively high due to the Corporate Average Fuel Economy (CAFE) standards which push for consistently higher fuel economy in cars and trucks. However, this increased compression limits engine performance with higher boost settings by decreasing the size of the fuel-air charge in the combustion chamber, forcing the ignition timing to retard far below MBT (Mean Best Timing, the theoretical optimal ignition timing). Therefore, the Carbahn Autoworks S63 engine has 0.5 less compression to optimize the engine for the increased boost. In an emissions-legal street car, the lowered compression has the added benefit of reducing catalyst inlet temperatures and improved drive-ability on pump gas.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"CarBahn","offers":[{"title":"Default Title","offer_id":49291497079101,"sku":"CBB06-08-5022","price":25995.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/files\/stage-1-s63.jpg?v=1762365125"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0883\/1896\/8125\/collections\/CBB463-6003_79e3b348-0c0f-477c-a159-c01a1acaf934.png?v=1762364897","url":"https:\/\/carbahn.com\/collections\/f9x-x5m-x6m-engines-engine-components.oembed","provider":"CarBahn","version":"1.0","type":"link"}