SWAVE & SUMMIT Front Lower Subframe Tie Bar/Control Arm Brace | Engine Cradle Brace/Front Cross Bar | Ford Focus MK4/Mk4 (2018+) ST 2.3, 1.0 & 1.5 EcoBoost | Underbody Chassis/Lower Arm Brace, Aluminium 2-Point

SWAVE & SUMMIT Under-Chassis Reinforcement for Ford Focus MK4 ST 2.3, 1.0 EcoBoost, 1.5 EcoBoost

Transform the way your fourth‑generation Focus drives with this SWAVE & SUMMIT front underbody reinforcement bar. Engineered to stiffen the front end of the platform, it links key pick-up points on the engine cradle to cut deflection under load, giving crisper turn‑in, rock‑solid front‑end bite and a more confidence‑inspiring feel on road and track.

Constructed around a monocoque aluminium triple forged tube, it delivers exceptional strength without unnecessary weight. Finished in the signature SUMMIT orange, it looks purposeful under the car and complements any handling‑focused build.

Why enthusiasts choose it

• Sharper steering feel and quicker response through corners
• Improved body control and stability when braking and accelerating
• Reduced chassis flex for a more planted, connected drive
• Lightweight aluminium construction with a tough, long‑lasting finish
• Ideal for spirited road use and track sessions

Compatibility

• Ford Focus MK4 ST 2.3 petrol
• Ford Focus MK4 1.0 EcoBoost
• Ford Focus MK4 1.5 EcoBoost

What it does

This front crossmember stiffener ties the lower control arm and subframe pick‑up areas together, reducing unwanted movement in the front structure. By limiting flex in the underbody, the suspension geometry stays more consistent, delivering better front‑end grip, cleaner exits and a tighter, more precise drive. Commonly searched as a control arm brace, engine cradle brace, front cross bar, lower arm reinforcement or front underbody brace for Focus MK4.

Build quality

• Monocoque aluminium triple forged tube for high stiffness to weight
• Precision hardware for a secure, accurate fit
• Signature SUMMIT orange finish for a premium look

Proven with our customers

We have fitted SWAVE & SUMMIT bracing to customer cars and the feedback is consistently positive, with noticeable gains in steering precision and overall stability on the MK4 platform.

Installation

Professional fitting recommended. MJ Modifications offers installation at our Warwickshire workshop. Request a quote at info@mjmodifications.co.uk.

Search-friendly terms

Focus MK4 ST chassis upgrade, Focus 2.3 ST front crossmember brace, Focus MK4 EcoBoost handling kit, front underbody bar Focus, lower control arm reinforcement Focus MK4, engine subframe brace, front cross brace, Focus MK4 road and track handling upgrade, SWAVE SUMMIT orange brace.