Big Gun 03-04 Polaris Predator 500 Rev Box 2021-audi-s4-premium-esi3629595 BORLA® Cat-Back™ & Axle-Back exhaust

BORLA® Cat-Back™ & Axle-Back exhaust systems feature patented straight-through and multi-core technology designed to unleash hidden horsepower

radius or straight LED

Built-in Internal/External Fins: Built-in internal and external fins transfer heat from the oil to the outside air for maximum cooling

73/10 (linear and non-linear)

Simply press the RE-START Button located on the battery

Big Gun 03-04 Polaris Predator 500 Rev Box 2021-audi-s4-premium-esi3629595 BORLA® Cat-Back™ & Axle-Back exhaustIf you are looking to swap out your stock CDI box, the Big Gun Over Rev Box is an affordable alternative to highly priced OEM replacement boxes. It increases the overall RPM limit over the stock box and advances the timing curve. Easy direct plug in replacement to stock CDI box Increases overall RPM limit 6 Month Limited Warranty Advanced timing curve