The Billy Boat Performance Exhaust PRT after-cat system employs exhaust technology unique to the aftermarket. So unique, in fact, it doesn't use a muffler at all. The Billy Boat Performance Exhaust PRT system is simple in design, though more complexin theory, which suggests that you can have a mellow sound at cruising speeds and a sport note when you're tearing up the streets. It allows true straight through exhaust passage under aggressive driving conditions, through a mellow sound is emittedat cruising speeds thanks to the unique Purge Chamber. This Billy Boat Performance Exhaust PRT system works purely on physics without mechanical devices to direct exhaust flow.
Using an in-house Dynojet chassis dyno on a 2001 6-speed with aBilly Boat Performance Exhaust PRT system show gains of 12 additional horsepower and 14 lbs/ft of torque. BB Part Number FCOR-0235.