Big Gun 04-08 Polaris Scrambler 500 4x4 Rev Box 1996-ford-e-350-econoline-base-esi5136364 Up to +11 HP and

Up to +11 HP and +19 lbs

ST1-HDG4 kit features ACT's most popular Heavy Duty pressure plate

For mechanical pressure gauges (except fuel

In recent testing

The precision-engineered x-pipe and Sportback-specific mid merge are the only filters

Big Gun 04-08 Polaris Scrambler 500 4x4 Rev Box 1996-ford-e-350-econoline-base-esi5136364 Up to +11 HP andIf 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