ST Lowering Spring Kit - 20/10 - 4 -series; F32, F33 (3C) coupe 02/12- 420i, 428i, 420d

ST Suspensions Performance Spring Set for BMW 4 Series Two Door Models

Transform the way your BMW feels and looks with this ST performance spring set. Engineered to work seamlessly with factory shock absorbers, it gives a tasteful drop at the front and rear for a sharper stance, enhanced stability and real-world drivability. Ideal for daily use and weekend blasts, this upgrade brings crisper turn in, reduced body roll and a lower centre of gravity without ruining comfort.

Compatible with BMW 4 Series two door models from 2012 onwards, including 420 petrol and diesel variants and 428 petrol models. Also suits vehicles equipped with factory adaptive damping systems where applicable. Please ensure your vehicle falls within the axle load limits below.

Why enthusiasts choose this setup

• Ride height drop of approximately 20 mm at the front and 10 mm at the rear for a purposeful, even stance
• Noticeably tighter handling with reduced pitch and squat under acceleration and braking
• Vehicle specific spring rates for balanced comfort and control on British roads
• Premium construction in chrome silicon steel, heat treated multiple times for long-term durability
• Factory level build quality with a tough epoxy powder coated finish to resist corrosion
• Works with original equipment dampers, including adaptive systems on suitable models

Real results you can feel

We run these on customer cars and in our own fleet. Feedback has been consistently positive, praising the improved cornering confidence, planted feel and enhanced appearance without harshness. It is a brilliant suspension upgrade for anyone wanting a clean drop and a more dynamic drive.

Fitment details

• BMW 4 Series two door models from 2012 onwards, including 420i, 428i, 420d
• Chassis references often searched for: F32 and F33
• Power range suitability: 135 to 180 kW
• Maximum front axle load: 965 kg
• Maximum rear axle load: 1170 kg

Technical highlights

• Approximate lowering front and rear: 20 mm front, 10 mm rear
• Engineered to operate with OE dampers for a simple, effective suspension refresh
• Adaptive damper friendly on applicable vehicles
• Multiple tempering processes for strength and longevity
• Epoxy coated for corrosion resistance through UK weather

Installation and support

Professional fitting recommended. Book your install with MJ Modifications in Warwickshire. For a quote and availability, email info@mjmodifications.co.uk.

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