In short: 3" JT Cat back exhaust. For whom: For those who want a sportier sound. Details: 3" (76 mm) exhaust system manufactured from 1,5-2 mm double side aluminized steel. Sound level according to ISO R362: 78 dbA (+2 db). Back pressure reduction: 50% (appr. 600 Pascal). Stainless matt polished tail pipe.