Infiniti G37 Chassis Mount Wing Installation Guide
If you are stripping down your G37 for dedicated track duty, adding functional rear downforce requires cutting into the rear bumper and replacing the factory bash bar.
The Short Answer (TL;DR)
Installing a chassis-mounted wing on the Infiniti G37 takes 3 to 4 hours and requires removing the taillights, rear bumper, and factory bash bar. You will replace the OEM bash bar with an aftermarket tubular unit that integrates the wing uprights. Since the bumper is off, this is the perfect time to upgrade your exhaust system.
The DIY Process Overview
Trunk-mounted wings often warp the thin factory sheet metal under high aerodynamic loads. A chassis mount bracket secures the aero directly to the frame, providing rigid, structural downforce. To begin, remove the trunk liner and unbolt the taillights using an 8mm socket. Unclip the rear bumper cover by removing the plastic retainers along the top edge, the bottom fascia, and the 10mm bolts tucked inside the rear wheel wells.
Once the rear bumper is detached, unplug the reverse sensors and license plate lights to completely remove the cover. This exposes the factory rear bash bar. Unclip the wiring harnesses routed across it, then remove the 12mm bolts holding the crash beam to the chassis. Bolt the new aftermarket tubular bash bar to the factory frame rails, ensuring it is perfectly centered before fully tightening the hardware.
The final step requires modifying the rear bumper cover to allow the wing brackets to pass through. Tape off the exact exit points, measure twice, and carefully cut the plastic using a rotary tool. Reinstall the bumper and mount the wing to the uprights using the supplied hardware.
Why You Should Upgrade While You're In There
Removing the rear bumper gives you completely unobstructed access to the muffler sections, flanges, and exhaust hangers. If you are modifying the car heavily enough to cut the rear bumper for a chassis-mounted wing, you should not be running a restrictive factory exhaust system. Swapping to a high-flow aftermarket cat-back or axle-back exhaust is significantly easier with the bumper completely out of the way.
Recommended Upgrade: Performance Cat-Back Exhaust System
Frequently Asked Questions
How difficult is it to cut the bumper for a chassis-mounted wing?
Cutting the bumper is the most tedious part of this installation. Take your time, use painter's tape to map out the bracket slots, and start with a smaller cut than necessary. You can always trim away more plastic with a Dremel or file to get a perfectly flush fit around the uprights.
Does the trunk still open after installing a chassis-mounted wing?
No, the trunk will not open normally because the rigid wing uprights block the lid's outward path. However, you can access the trunk compartment by removing the top two mounting bolts on the wing uprights, which allows the entire wing assembly to pivot downward and out of the way.
