ISR Performance Y-Pipe - Infiniti G37 / 370Z / Q50 - 3" T304 Stainless | VQ35HR/VQ37VHR Race Merge | Deep Aggressive Tone | Eliminate Stock Restriction | Direct Bolt-On for G37, 370Z, Q50 3.7L RWD

Replace the restrictive factory y-pipe on your 2008-2013 Infiniti G37 Coupe/Sedan, 2009-2020 Nissan 370Z, or 2014-2015 Infiniti Q50 3.7L RWD with the ISR Performance Y-Pipe engineered to kill the worst chokepoint in the entire VQ35HR/VQ37VHR exhaust system, because the OEM y-pipe necks down to a tiny 1.8" at the merge and crush-bends kill flow and power, while the ISR Y-Pipe uses true 3" mandrel-bent T304 stainless piping that merges at a smooth, optimized race-style collector with proper angles to eliminate turbulence and backpressure, then steps to a 3" outlet that mates to any 3" cat-back for massive flow gains that unlock a proven 7-11whp and 6-9wtq with sharper throttle response, stronger mid-range torque, and harder pull from 3500 RPM to redline, and the sound gets deeper, louder, and more aggressive with a bass-heavy idle and cold start that builds into a raw, raspy VQ growl at wide-open throttle that makes your G37, 370Z, or Q50 sound like a tuned JDM car, and the increased pipe diameter and smooth merge reduce the harsh, tinny rasp the stock y-pipe creates while still letting your cat-back sing, and the entire y-pipe is fabricated from heavy-gauge T304 stainless steel with full-penetration TIG welds, CNC-machined 3" flanges, reinforced hanger mounts, and a brushed finish that resists corrosion, cracking, and heat discoloration through years of street, canyon, and track abuse, and fitment is 100% direct bolt-on for VQ35HR/VQ37VHR RWD platforms using all OEM mounting points with zero cutting or welding, tucking high and tight with perfect ground clearance while clearing the transmission, driveshaft, steering rack, and chassis braces on manual and automatic cars with no rattling or interference, and the kit ships complete with multi-layer steel exhaust gaskets and Grade 10.9 hardware for a leak-free, solid install that takes under an hour on a lift, and it pairs perfectly with ISR, Z1, Motordyne, or any 3" test pipes and cat-back to build a full high-flow VQ exhaust that sounds as violent as it performs, so if your G37, 370Z, or Q50 3.7L feels choked, sounds quiet, and you want the best first exhaust mod for horsepower-per-dollar, the ISR Performance Y-Pipe is the proven upgrade to boost VQ power and sound, and every unit is jig-welded, pressure-tested, and QC inspected for flange flatness, merge alignment, and weld penetration so you get ISR’s legendary fit, flow, and tone without the leaks, cracks, or fitment issues you get from cheap eBay y-pipes.