Pro Series Muffler - 3.00 Center In / 3.50 Center Turn Down Out -Moderate Sound GM Avalanche/Escalade/Sierra/Sierra Limited/Silverado/Silverado LD Turnbuckle Boost Control allows for

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

Measured Flow: 730 CFM @ 7" H20

Steel Torrington Needle bearings replace plastic thrust washers

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

our manufacturing process includes fully automated wire cutting and terminal crimping to ensure you get the highest quality replacement parts you need to get your truck back on the road quickly

Pro Series Muffler - 3.00 Center In / 3.50 Center Turn Down Out -Moderate Sound GM Avalanche/Escalade/Sierra/Sierra Limited/Silverado/Silverado LD Turnbuckle Boost Control allows forThe 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.