Designed specifically for the NPP equipped C8 Corvette, CORSA Performance C8 Muffler Delete NPP Catback Exhaust System. Pure Sound. No Restrictions. Now available with 4.5 in. flat cut carbon fiber tips, CORSA Performance Muffler Delete C8 cat back exhaust systems are designed exclusively for NPP equipped Corvettes to eliminate restrictions, maximize weight savings, resolve check engine lights, and bring the noise. Different from the Track Series Exhaust, the CORSA Performance Muffler Delete exhaust system retains the NPP valve eliminating CEL issues while also allowing for some sound control. This exhaust system is ideal for C8 drivers looking for the loudest exhaust combination CORSA offers for the NPP equipped C8 Corvette. Each system has been Track-Tested and Dyno proven to maximize performance producing up to 18 HP and 16 LBS Ft. of TQ. all while shaving 20+ pounds from the stock exhaust system.