Drop The Ride Height. Raise The Confidence.

Dial in stance without sacrificing control.
CarBahn Height Adjustable Spring (HAS) kits deliver a lower center of gravity, sharper turn-in, and a more planted feel— with adjustment range to set your ride height the way it should’ve come from the factory.

Height adjustable • Improved handling • Street + track ready

Watch Why It Matters Shop by Vehicle

CarBahn Height Adjustable Spring (HAS) kit spring and hardware

The CarBahn Way

Ride Height You Control. Handling You Can Feel.

A proper suspension setup isn’t about “slamming” the car—it’s about balance. CarBahn adjustable (HAS) kits let you lower your BMW/M to the stance you want while improving response, stability, and overall confidence when you drive it the way it was meant to be driven.

Key Component

Bump Stops

Lowering changes available suspension travel. Correct bump stops help preserve control under compression, reduce harsh bottom-outs, and keep the chassis composed over real-world hits—potholes, curbing, and hard loading.

Key Component

Threaded Collars

The adjustment point that makes it all possible. Fine thread pitch gives precise ride-height tuning, repeatable corner-to-corner setup, and a locked-in stance that doesn’t drift once it’s dialed.

The result: a lower center of gravity, more planted transitions, and a BMW/M that feels tighter and more predictable— without turning your daily driver into a punishment.

Tech Tips · Adjustable Suspension / HAS Kits

Design Process

Designed & Tested for Race Loads — Built for Street Control

CarBahn suspension is engineered the same way we build engines: obsessively. These kits are designed, built, and tested in America with proprietary spring rates defined by Steve Dinan after thousands of hours of chassis research—developed for the Peregrine Racing GT4 program and refined for daily-driven cars.

Designed, Built & Tested in America

1,000s of Hours of R&D

Proprietary Spring Rates

Chrome Silicon Steel

Built for Extreme Lateral G

Spring rate testing equipment used to validate CarBahn spring specifications

Validation

We Test Spring Rates — We Don’t Guess

Measured load-by-load to match Steve Dinan’s chassis-specific targets.
Consistency checked across production so the car feels identical, kit after kit.
Built for real lateral loads, not just “looks good parked.”

Peregrine Racing BMW M4 GT4 race car program

Proven Under Load

Engineered for Peregrine Racing — Refined for Street Cars

Developed alongside the M4 GT4 program for real track stress.
Meant to handle extreme lateral G with repeatable stability.
Street-friendly control: sharper turn-in without turning harsh.

Springs are formed from cold-wound, high-tensile chrome silicon steel, with proprietary chassis-specific spring rates to Steve Dinan’s spec—built to stay composed when the car is pulling real lateral G, not just cruising to a meet.

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Choose Your Platform

Select your chassis below to view fitment, adjustment range, and kit details. These height-adjustable suspension kits are built to lower the center of gravity and sharpen handling—without ruining the daily drive.