Pro Series Muffler - 3.00 Center In / 3.50 Center Turn Down Out -Moderate Sound GM Avalanche/Escalade/Sierra/Sierra Limited/Silverado/Silverado LD Hot Tranmission oil has to

Hot Tranmission oil has to be Cooled to keep you on the track

Applicable core charge of $300 to be added at check out

Turnbuckle Boost Control allows for ease of adjustment for altitude and extreme tuning

and less current is more

Pro Series Muffler - 3.00 Center In / 3.50 Center Turn Down Out -Moderate Sound GM Avalanche/Escalade/Sierra/Sierra Limited/Silverado/Silverado LD Hot Tranmission oil has toThe Pro Series mufflers work on all applications ranging from street trucks, diesel pullers and RV pushers to every class of racing on dirt or asphalt. During development, at the dyno and track, the Pro Series mufflers consistently delivered performance that is equal to or surpasses open pipe systems, while dramatically reducing sound levels across the RPM range.