Borla XR-1 Racing Mufflers Starters The unit preserves all factory

The unit preserves all factory safety and traction control systems while remapping the pedal curve for a more aggressive tip-in response

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

reducing side loading on the valve stem

and this cooler is the proven solution

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

Borla XR-1 Racing Mufflers Starters The unit preserves all factoryBorla 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