SUPERTRAPP 2 in 1 Adapter Kit 813-70883

2 in 1 Adapter Kit This adapter kit will allow you to convert your 815-70883 2:2 system into a 2:1 system in mere minutes. Perfect for the hooligan racer who rides both short/indoor type tracks where the added low-end torque (2:1) is needed as well as longer/outdoor tracks where mid-top end HP (2:2) is key., Kit contains; 2:1 Collector adapter, 4" Competition Aluminum Race Series Muffler, 12 Discs, Closed End Cap/Screws and the mounting bracket.