{"product_id":"c8-corvette-stingray-autospeed-cat-back-exhaust-polished-npp","title":"C8 Corvette Stingray AutoSpeed Exhaust with NPP - Polished Tips","description":"\u003cdiv style=\"text-align: start;\"\u003e\u003cimg src=\"https:\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/cca-free-shipping-performance-banner-v1_png.png?v=1784299920\" alt=\"Free shipping on AutoSpeed C8 Corvette exhaust systems\" style=\"margin-bottom: 16px; float: none;\"\u003e\u003c\/div\u003e\n\u003ch2\u003eC8 Corvette Stingray NPP Valved Cat-Back Exhaust with Quad Stainless Tips (2020-2026)\u003c\/h2\u003e\n\u003cp\u003eAlready have the NPP exhaust and want more out of it? The \u003cstrong\u003eAutoSpeed Performance Series Cat-Back Exhaust\u003c\/strong\u003e, \u003cstrong\u003eASP-EXH-CBK-GM-0001-PS\u003c\/strong\u003e, is a valved cat-back for the \u003cstrong\u003e2020-2026 C8 Corvette Stingray\u003c\/strong\u003e with the \u003cstrong\u003e6.2L LT2\u003c\/strong\u003e engine. It runs on your factory valves, so your quiet and loud modes stay exactly where they are.\u003c\/p\u003e\n\u003cp\u003eWith 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.\u003c\/p\u003e\n\u003ch3\u003eProduct Details\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct:\u003c\/strong\u003e AutoSpeed Performance Series valved cat-back exhaust\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTip Finish:\u003c\/strong\u003e Polished stainless, slanted dual wall, embossed AutoSpeed logos\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTips:\u003c\/strong\u003e Four, 4.5 inch outer diameter\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMaterial:\u003c\/strong\u003e 304 stainless steel throughout, machined brushed finish\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eTubing:\u003c\/strong\u003e 3 inch diameter, 0.065 inch wall, mandrel bent\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCrossover:\u003c\/strong\u003e Cast 304 stainless X-pipe\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMufflers:\u003c\/strong\u003e 3 inch straight through, three chambers with the valves closed\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSound Valves:\u003c\/strong\u003e Billet 304 stainless housings with airfoil butterflies\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eHangers:\u003c\/strong\u003e Billet stainless, TIG welded to the system\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eClamps:\u003c\/strong\u003e Stainless Accuseal band clamps, T-bolt clamps at the tips\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eBenefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour drive mode still runs the exhaust. Quiet in Tour, open in Track, nothing to switch.\u003c\/li\u003e\n\u003cli\u003e22 more horsepower and 10 more lb-ft at the wheels, measured by AutoSpeed against your factory Z51 exhaust on 93 octane.\u003c\/li\u003e\n\u003cli\u003e9.5 pounds lighter than the 77 pound factory Z51 cat-back it replaces.\u003c\/li\u003e\n\u003cli\u003eIt comes off as easily as it goes on. Nothing is cut, drilled or welded.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWhat to Expect\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eA deeper C8 Corvette exhaust note with the valves open, from cold start through the top of third.\u003c\/li\u003e\n\u003cli\u003eBright quad exhaust tips filling the rear fascia, finished to match the factory stainless.\u003c\/li\u003e\n\u003cli\u003ePower AutoSpeed measured at the wheels, not at the crank.\u003c\/li\u003e\n\u003cli\u003eHighway cruising you can hold a conversation through, with the valves closed.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eImportant Exhaust Notes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eYour 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.\u003c\/li\u003e\n\u003cli\u003eNo tune is required.\u003c\/li\u003e\n\u003cli\u003eA valve relearn is required. Your AFM and NPP valves are relearned with an OBD scan tool, per \u003cstrong\u003eGM Document ID #5406413\u003c\/strong\u003e. Skipping it can cause a check engine light and damage the valves. Any Chevrolet dealer can do it.\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended. About three hours on a lift, with the rear wheels, wheel liners, air deflectors and rear bumper fascia off.\u003c\/li\u003e\n\u003cli\u003eThe 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.\u003c\/li\u003e\n\u003cli\u003eRe-torque the tip clamps after the first heat cycle.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003e\u003cspan style=\"color: #ff2a00;\"\u003eCORVETTE COMPATIBILITY\u003c\/span\u003e\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eGeneration:\u003c\/strong\u003e C8 Corvette\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel:\u003c\/strong\u003e Stingray\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eModel Years:\u003c\/strong\u003e 2020-2026\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e 6.2L LT2 V8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBody Styles:\u003c\/strong\u003e Coupe and HTC Convertible\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRequired Equipment:\u003c\/strong\u003e Factory NPP dual-mode exhaust\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eUse Overview\u003c\/h3\u003e\n\u003cp\u003eUse this AutoSpeed cat-back when you want a deeper note, bright quad tips and your NPP modes untouched. Built for a street driven \u003cstrong\u003e2020-2026 C8 Corvette Stingray\u003c\/strong\u003e with the \u003cstrong\u003efactory NPP exhaust\u003c\/strong\u003e.\u003c\/p\u003e\n\u003ch3\u003eWhy Buy from Custom Corvette Accessories\u003c\/h3\u003e\n\u003cp\u003eIf you want your \u003cstrong\u003e2020-2026 C8 Corvette Stingray\u003c\/strong\u003e louder without giving up the NPP modes, the AutoSpeed \u003cstrong\u003eASP-EXH-CBK-GM-0001-PS\u003c\/strong\u003e 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.\u003c\/p\u003e\n","brand":"AutoSpeed","offers":[{"title":"Default Title","offer_id":50403605315821,"sku":"ASP-EXH-CBK-GM-0001-PS","price":3695.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1359\/4413\/files\/c8-corvette-npp-valved-cat-back-exhaust-autospeed-asp-exh-cbk-gm-0001-ps.png?v=1786408474","url":"https:\/\/www.corvettepartsandaccessories.com\/products\/c8-corvette-stingray-autospeed-cat-back-exhaust-polished-npp","provider":"Corvette Parts from Custom Corvette Accessories","version":"1.0","type":"link"}