ST XTA Plus 3 Coilover Kit (Damping Adjustable With Top Mounts) for BMW F2X 35i 40i

The ST XTA Plus 3 Coilover Kit is a high-performance suspension upgrade designed for F2X BMW M135i, M140i, M235i and M240i owners who want premium adjustability and sharper chassis control without the cost of full motorsport suspension. Developed in partnership with KW Automotive, the XTA Plus 3 delivers three-way adjustable damping(rebound, low-speed compression, high-speed compression) alongside motorsport-grade aluminium top mounts for enhanced steering precision and camber adjustment.

This kit is the top tier of the ST range, offering exceptional value for fast-road and track-day enthusiasts who demand flexibility, control and long-term durability.

Key Features

• Three-way adjustable damping:
  – Adjustable rebound
  – Adjustable low-speed compression
  – Adjustable high-speed compression

• Aluminium camber-adjustable top mounts included

• Height-adjustable front and rear

• KW-derived damping technology

• Monotube damper design for consistent performance

• Sharper turn-in and improved mid-corner grip

• Progressive sport springs for balanced fast-road behaviour

• Designed for both spirited driving and track sessions

• TÜV-certified lowering range

Compatibility

BMW F20 / F21 – 1 Series (6-Cyl Models)

• M135i

• M140i

BMW F22 / F23 – 2 Series (6-Cyl Models)

• M235i

• M240i

(Designed specifically for B58/N55-powered F2X M Performance models.)

Ideal For

• Fast-road drivers wanting improved chassis response and fine suspension control

• Track-day users needing adjustable damping and camber

• Owners running high-grip tyres or power upgrades

• Drivers who want sharper steering precision through top mounts

• Cars seeking an ideal middle-ground between V3-style refinement and Clubsport-like adjustability

Why Choose the ST XTA Plus 3 Coilover Kit

The XTA Plus 3 is one of the best-value coilovers available for the F2X platform, using proven KW Automotive technology packaged with ST’s durable materials and accessible pricing. The three-way adjustability allows you to fine-tune compression for bumps and kerbs separately from body control, while the rebound adjuster lets you tailor how the car settles through corners.

The included camber-adjustable aluminium top mounts deliver the precision and alignment flexibility needed for modern performance tyres. The result is a suspension setup that feels significantly more responsive and confidence-inspiring than OEM, without stepping into full motorsport damping.

For M135i, M140i, M235i and M240i owners who want a serious fast-road and track-ready setup, the XTA Plus 3 is an exceptional upgrade.

Installing / Notes

• Professional installation, alignment and corner balance are strongly recommended.

• Top mounts may increase NVH slightly compared to OEM rubber mounts.

• Check wheel and tyre clearance when using aggressive camber or low ride heights.

• All adjustment points are accessible once installed.