APR Catback Exhaust System – VW / Mk8 / GTI – CBK0047

System Overview

Our exhaust system uses larger piping compared to the factory exhaust system, yet weights9% less than stock! We use 3″(76mm)OD piping, which then splits to a dual 2.5″(63.5)piping. The factory system uses2.56″(65mm)piping, which reduces to2.36” (60mm)before entering the muffler. It then splits and exits the muffler as a dual 2.36” (60mm) system, but reduces down to 2.17” (55mm) just after exiting! These reductions greatly diminishing the overall cross-sectional area of the system. The main APR tubing has across-sectional area up to 60% larger than stock! Finally, our system’s 4″(102mm)exhaust tips eclipse the factory3.75″(95mm)tips, giving the rear of the vehicle a sportier look.

MUFFLER / RESONATOR

The rear muffler assembly is a dual Helmholtz resonator and muffler in one fully integrated package. The entire system is straight-through with a 3” (76mm) inlet splitting evenly to a dual 2.5” (63.5mm) setup for the vehicle’s dual tip configuration. Exhaust gasses pass through the muffler first, which is responsible for smoothing the exhaust note via perforated tubing that’s tightly wrapped with stainless steel and fiberglass material. Then unwanted frequencies are eliminated in the dual Helmholtz resonators. Exhaust gasses pass unrestricted through for maximum performance. The muffler / resonator setup has a beautiful brushed finish, and is tucked high in the exhaust tunnel, making it perfect for lowered vehicles.