The Edge Trail Jammer performance kit delivers the ideal air/fuel enhancements for your 4.0L Wrangler/Rubicon. The Trail Jammer dramatically improves the power and throttle response of your Jeep both on and off the road. The kit includes an electronic module to performance tune your engine, a machined throttle body to improve driveability and a cold air intake system to maximize air flow. Feel the difference 20% more HP can make on your Jeep -- almost a two second improvement in your 0-60 times! Best of all, the entire kit bolts on in less than an hour. KEY FEATURES • Adds up to 20% more HP* • Excellent Throttle Response • Better Acceleration • Improved On and Off-Road Driveability • Increased Air Flow** • Power to Roam that Bolts on in Less than an Hour *Power gains based on complete Trail Jammer performance kit including electronic module, throttle body and cold air intake. **Provides increased air flow with Trail Jammer cold air intake system installed. Excludes Grand Cherokee