Borla XR-1 Racing Mufflers Winches Proper surface preparation is critical

Proper surface preparation is critical -- all sealing surfaces must be clean and free of old gasket material before installation

and advances timing for measurable gains

It accepts stock carburetors and distributors with no modifications

The friction disc uses a premium ceramic-metallic compound rated for 500 ft-lbs of torque—enough for a stock or lightly tuned Cummins

The CHEVY V6 90-DEG MAIN BOLT KIT reinforces the engine's lower end by providing consistent

Borla XR-1 Racing Mufflers Winches Proper surface preparation is criticalBorla XR 1 Racing Mufflers (Mufflers) are purpose built for high horsepower applications where minimizing backpressure is critical. Originally developed for NASCAR and endurance racing the XR 1 uses a straight through design with Borla's patented Multi Core technology to achieve near zero flow restriction while producing a controlled aggressive exhaust note. These mufflers are the choice for builds producing 950+ hp where every pound of backpressure