QUICK CHANGE REAR SUBFRAME + BULLDOG XR420-I 1500HP FOR NISSAN 370Z/400Z
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The FRESH X Z34 Quick Change Rear Subframe was designed for one thing – keeping your Z alive when you’re sending 1000+ hp sideways. Built for Nissan 370Z / 400Z, this setup lets you drop in a Bulldog or Winters quick change and get back on track fast.
Forget solid-mounting your diff and shaking the car apart – we run polyurethane bushings instead. That means far less shock into your axles and driveshafts, smoother vibes through the chassis, and a drivetrain that lasts way longer, even when you’re clutch-kicking every corner. Each unit is jig-built so the diff sits dead straight, CNC-cut, fixture-welded, and finished in black powder coat to survive season after season. Servicing is easy – four bolts, straight shot from the bottom, swap the diff in minutes with an impact gun.
Yes, you’ll need to trim the rear crossmember slightly, but that’s how we get the diff sitting at the right height for slammed coilover setups. Pair it with our solid or aluminum subframe bushings for max rigidity, while still allowing just enough float to absorb the hits.
Now add the FRESH X BULLDOG XR420-I Quick Change Differential, built by Diversified Machines and rated for 1500+ HP. Specifically engineered for high-power IRS race cars, the XR420-I delivers blazing-fast gear swaps, bulletproof reliability, and minimal downtime. With features like forged aluminum side bells, Kwik-Fill rear cover, Vascomax® 300M severe-duty lower shaft, Thor35 aluminum spool, and Bulldog Super G Ring & Pinion, this is one of the most advanced quick change diffs available today.
Here’s the real game changer: running the XR420-I inside the FRESH X Quick Change Subframe creates a complete rear-end solution trusted by serious racers. Quick gear swaps in under 5 minutes, rock-solid alignment, reduced vibration, and proven strength under 1000+ hp loads. It’s the kind of combo that separates weekend warriors from podium finishers.
If you’re aiming for drifting dominance, drag race launches, or time attack precision, this bundle is your ultimate advantage. Built by racers who push parts to their limit, so you don’t have to – this is the setup that keeps you on track, breaking records instead of breaking parts.
