STX Coilover Kit - 3-series (F30, F31); (3L, 3K) sedan; 2WD without electronic dampers max. allowed axle weight in kg Front: -1090

Transform your BMW 3 Series ride and stance

Unlock sharper handling, a purposeful drop and everyday comfort with this height-adjustable suspension package engineered for the BMW 3 Series F30 and F31 platforms. Designed for rear-wheel-drive models without factory adaptive damping, this kit delivers precise ride-height control and confidence-inspiring road manners, backed by KW Automotive engineering.

Compatible vehicles and axle loads

• Chassis: BMW F30 and F31 3 Series - also referenced as type 3L and 3K
• Drivetrain: rear-wheel drive only - not suitable for cars with electronic damping control
• Permitted axle loads: front 951 to 1090 kg, rear up to 1230 kg

Lowering range

• Front adjustment: 40 to 65 mm
• Rear adjustment: 30 to 60 mm

What you will feel

• Flatter cornering and reduced body movement on fast A-roads and B-roads
• Improved turn-in and mid-corner stability for road and occasional track use
• Taut, composed ride that still works for daily driving and motorway miles
• Clean, even arch gap and enhanced wheel fitment for a purposeful stance

Engineered for performance and longevity

• Threaded shock bodies for precise ride-height tuning at each corner
• Galvanised struts with additional corrosion protection for tough UK weather
• Twin-tube dampers with chrome-plated piston rods for durability and smooth response
• Polyamide spring perches for easy, reliable adjustment
• Sealed design with dust protection and bump stops to keep performance consistent
• Complete spring and damper solution developed in conjunction with KW Germany

Tried, fitted and loved

We have installed this setup for numerous MJ Modifications customers and the feedback is consistently positive: better grip, tighter steering response and a ride quality that feels premium, not harsh. It is a fast-road favourite and an ideal upgrade if you want adjustability without compromising everyday usability.

Installation and setup

• Professional fitting and a full alignment are strongly recommended after installation
• Height adjustment should be set evenly side to side and checked after the suspension settles

Book expert fitting

Want it fitted right first time? MJ Modifications in Warwickshire offers installation and geometry setup for this kit. Request a quote: info@mjmodifications.co.uk

Why this upgrade stands out

This performance suspension kit is the ideal BMW F30 and F31 upgrade if you are chasing better road feel, a lower centre of gravity and precise height adjustability. With German engineering, corrosion resistance and easy on-car adjustment, it is perfect for enthusiasts seeking a clean drop, improved handling and dependable quality.

Search-friendly fitment and features

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