Flowmaster Y Collector - Length: 17 1/2" - Primary Size (Slip-Fit) 3" - Outlet Size (Final) 4" 711021 The bottom line is that

The bottom line is that if you want to make more power

Two Trap Door Baffles

Bearing Included

3/4 in Jam Nut

Performer 2-O

Flowmaster Y Collector - Length: 17 1/2" - Primary Size (Slip-Fit) 3" - Outlet Size (Final) 4" 711021 The bottom line is thatFlowmaster's "Y" collectors are designed to be used with single exhaust systems. #Y 350450 and #Y350500 are recommended with professional race mufflers #964530 14 & #965030 14. Not legal for sale or use on pollution controlled motor vehicles. * These part numbers are now ONLY available in Aluminized Steel. V=Venturi Manufacturer of performance exhaust systems, mufflers, cold air intakes, turbo boost modules, catalytic converters, race mufflers,