Borla XR-1 Racing Mufflers Starters reducing side loading on the

reducing side loading on the valve stem

The exhaust note will be unmistakable -- that signature choppy idle that announces you are not running a stock cam

this part ensures your engine maintains optimal operating temperature

and a precision-wound stator engineered for sustained output at low RPM

and tighten T-bolt clamps

Borla XR-1 Racing Mufflers Starters reducing side loading on theBorla 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 1100+ hp where every pound of backpressure