
The ARK Performance GRiP catback exhaust system for the 2014+ Infiniti Q50 3.7 VQ37VHR is a full T304 stainless steel, TIG-welded, mandrel-bent system engineered specifically for the RWD and AWD Q50 3.7 to deliver the deep, aggressive, refined VQ growl that owners want without the obnoxious rasp and highway drone common on cheaper catbacks, utilizing 2.5 inch primary piping that merges at a smooth Y-pipe before splitting into dual 2.5 inch pipes with a true X-pipe crossover to balance exhaust pulses, increase scavenging, and eliminate the harsh 2-3k rpm rasp the VQ37 is known for, and the rear section uses ARK’s signature GRiP straight-through mufflers with perforated cores and high-temp stainless packing that keeps cabin noise civilized at cruise with virtually zero drone at 70-80mph in 7th gear while opening up to a clean, metallic, high-rpm howl past 5000rpm, and it finishes with dual 4.5 inch polished slash-cut tips featuring laser-etched ARK logos that sit flush and centered in the OEM Q50 diffuser with perfect alignment thanks to factory-style hangers and precision jig welding, and because it’s a true bolt-on catback it installs directly to the stock catalytic converters using all included gaskets and hardware with no cutting, welding, or CEL triggers since you retain the factory cats and O2 sensors, and clearance is perfect on both RWD and AWD subframes with no contact on the rear diff or driveshaft, and sound levels measure roughly 85-88db at idle and 98-102db at WOT so it’s aggressive when you’re on it but docile during daily driving and cold starts, and performance gains are typically 8-12whp and 6-9wtq on a stock VQ37 with noticeably sharper throttle response due to the removal of the crushed factory midpipe and restrictive mufflers, and it pairs seamlessly with high-flow cats or test pipes if you want more volume later without swapping the whole system, and the entire setup is back-purged during welding to prevent internal corrosion and comes with a limited lifetime warranty on materials and workmanship, and install is straightforward at 1.5-2 hours with basic tools, and for Q50 3.7 owners who want the best balance of tone, build quality, fitment, and daily comfort, the ARK GRiP remains the benchmark that makes the VQ37 sound like Infiniti should have tuned it from the factory.