Big Gun 03-04 Polaris Predator 500 Rev Box 2021-audi-s4-premium-esi3629595 Built-in Internal/External Fins: Built-in internal

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

20" leads with professional grade clamps that are easily field serviceable

radius or straight LED

EPA Compliant Catalytic Converters

Big Gun 03-04 Polaris Predator 500 Rev Box 2021-audi-s4-premium-esi3629595 Built-in Internal/External Fins: Built-in internalIf 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