Pro Series Outlaw Race Muffler - 3.5"/3.0" GM Avalanche/Escalade/Sierra/Sierra Limited/Silverado/Silverado LD Additional regulation pressures can be

Additional regulation pressures can be easily obtained by swapping the internal regulator spring

Driver Side

Designed with a precision custom fit

BD's exclusive Variable Orifice Technology BD's solid

Complete Fuel Supply System

Pro Series Outlaw Race Muffler - 3.5"/3.0" GM Avalanche/Escalade/Sierra/Sierra Limited/Silverado/Silverado LD Additional regulation pressures can beTo address the increasing number of tracks around the country that are coming under pressure to regulate sound emissions, the Flowmaster Engineering team went to the drawing board with three goals; Maximum power, Maximum decibel reduction and Minimal weight. This exciting new line of race mufflers is the result of literally decades of Flowmaster involvement in the racing industry and were truly born at the track! Suited to all forms of motorsports