Verkline Rear Lightweight Tubular Subframe for BMW G29 Z4 – T45 Steel Rigid-Mount Rear Axle Carrier/Cradle/Differential Carrier – Adjustable Toe & Bump Steer, +10mm Diff Height, ~6.5 kg Weight Saving – Track/Performance Rear Frame Upgrade

Track-proven rear axle cradle upgrade for BMW G29 Z4 from Verkline. Engineered through 3D scanning, CAD development and FEA validation, then proven on the road. If you are lowering your car, chasing lap times or simply want a sharper, more connected rear end, this motorsport-grade rear cradle is the no-compromise solution.

Built from WRC-spec T45 tubing with S355 plates, this precision-welded assembly increases chassis rigidity, reduces mass and delivers cleaner, more predictable handling. We have installed this on our own builds and customer cars and the feedback has been outstanding: tighter rear-end control, more confidence on turn-in and alignment settings that actually stay put under load.

• Significant weight saving – around 6.5 kg less than the factory rear carrier, equating to roughly 33 percent reduction at the back of the car.
• Corrected driveshaft angles – the differential is raised by 10 mm to reduce stress on C.V. joints, ideal for cars running a lowered ride height.
• Rigid body connection – replaces the soft rubber mounting of the stock carrier with a direct chassis mount to prevent the subframe shifting during hard launches, cornering and braking.
• Bump steer tuning – integrated adjustment for the rear toe link pickup height allows you to fine-tune toe change through suspension travel for superior traction and stability.
• Polyurethane differential mounts – race-grade black poly bushes control final drive movement for consistent response.
• Service-friendly design – additional space around the underbody for easier access to components.
• Bolt-on compatibility – retains factory pick-up points for wishbones, anti-roll bar, brake line clips, exhaust hangers and headlight level sensor. No cutting or fabrication required.
• Quality assured – designed, fabricated and inspected in Poland. Welds are crack-tested and every assembly is checked before shipping.

Why enthusiasts choose this rear cradle

For drivers who demand precision, this assembly locks the rear geometry in place and gives you the tools to dial in toe characteristics properly. The lighter, stiffer construction improves feedback without compromising OE integration. It is the ideal foundation for track day setups, fast road builds and motorsport applications where repeatable alignment and durability matter.

Fitment and installation

Professional installation and alignment are recommended. MJ Modifications in Warwickshire can supply and fit, including setup advice for road or circuit use. To request a fitting quote, email info@mjmodifications.co.uk.

Compatibility

BMW G29 Z4 platform. Uses factory arms, anti-roll bar, brake line fixings, exhaust mounts and headlight range sensor locations for a true plug-and-play experience.

Materials and engineering

T45 steel tube (BS4T45 to BS4T100) paired with S355 sheet components for a high strength-to-weight ratio, validated by finite element analysis and real-world testing. Finished with meticulous fabrication for a purposeful, motorsport-grade appearance.

What you will notice

• Improved steering feel from the rear axle and more predictable rotation on corner entry.
• Reduced C.V. joint stress on lowered cars thanks to corrected diff height.
• Rear geometry that stays consistent under load for better traction and tyre wear.

Search-friendly terms

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