C8 Corvette Stingray AutoSpeed Exhaust with NPP - Polished Tips
C8 Corvette Stingray NPP Valved Cat-Back Exhaust with Quad Stainless Tips (2020-2026) Already have the NPP exhaust and want more out of it? The AutoSpeed Performance Series Cat-Back Exhaust, ASP-EXH-CBK-GM-0001-PS, is a valved cat-back for the 2020-2026 C8 Corvette Stingray with the 6.2L LT2 engine. It runs on your factory valves, so your quiet and loud modes stay exactly where they are. With the valves open the note comes in deeper and louder than the factory NPP system gives on its own. Close them and the exhaust routes through three chambers in each muffler before it reaches the tips. Out back, four polished stainless tips sit 4.5 inches across in the rear fascia, slanted dual wall with the AutoSpeed logo embossed into the face. Product Details Product: AutoSpeed Performance Series valved cat-back exhaust Tip Finish: Polished stainless, slanted dual wall, embossed AutoSpeed logos Tips: Four, 4.5 inch outer diameter Material: 304 stainless steel throughout, machined brushed finish Tubing: 3 inch diameter, 0.065 inch wall, mandrel bent Crossover: Cast 304 stainless X-pipe Mufflers: 3 inch straight through, three chambers with the valves closed Sound Valves: Billet 304 stainless housings with airfoil butterflies Hangers: Billet stainless, TIG welded to the system Clamps: Stainless Accuseal band clamps, T-bolt clamps at the tips Benefits Your drive mode still runs the exhaust. Quiet in Tour, open in Track, nothing to switch. 22 more horsepower and 10 more lb-ft at the wheels, measured by AutoSpeed against your factory Z51 exhaust on 93 octane. 9.5 pounds lighter than the 77 pound factory Z51 cat-back it replaces. It comes off as easily as it goes on. Nothing is cut, drilled or welded. What to Expect A deeper C8 Corvette exhaust note with the valves open, from cold start through the top of third. Bright quad exhaust tips filling the rear fascia, finished to match the factory stainless. Power AutoSpeed measured at the wheels, not at the crank. Highway cruising you can hold a conversation through, with the valves closed. Important Exhaust Notes Your car supplies the valve actuators. The kit ships valve bodies without motors and reuses your factory AFM and NPP actuators. A Stingray without factory NPP cannot use this system. No tune is required. A valve relearn is required. Your AFM and NPP valves are relearned with an OBD scan tool, per GM Document ID #5406413. Skipping it can cause a check engine light and damage the valves. Any Chevrolet dealer can do it. Professional installation recommended. About three hours on a lift, with the rear wheels, wheel liners, air deflectors and rear bumper fascia off. The install guide gives a torque figure for every joint, 44 lb-in through 60 lb-ft, including 75 lb-in on each actuator bracket. Have a torque wrench ready for those figures. Re-torque the tip clamps after the first heat cycle. CORVETTE COMPATIBILITY Generation: C8 Corvette Model: Stingray Model Years: 2020-2026 Engine: 6.2L LT2 V8 Body Styles: Coupe and HTC Convertible Required Equipment: Factory NPP dual-mode exhaust Use Overview Use this AutoSpeed cat-back when you want a deeper note, bright quad tips and your NPP modes untouched. Built for a street driven 2020-2026 C8 Corvette Stingray with the factory NPP exhaust. Why Buy from Custom Corvette Accessories If you want your 2020-2026 C8 Corvette Stingray louder without giving up the NPP modes, the AutoSpeed ASP-EXH-CBK-GM-0001-PS is the polished tip version of that system, built for the 6.2L LT2 with the factory NPP exhaust. Custom Corvette Accessories sells Corvette parts and nothing else, so if you are not certain your Stingray has NPP, ask us before you order.