Borla XR-1 Racing Mufflers Winches It accepts stock carburetors and

It accepts stock carburetors and distributors with no modifications

and advances timing for measurable gains

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

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

Borla XR-1 Racing Mufflers Winches It accepts stock carburetors andBorla 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