Race Tuning is required with this kit for the truck to function properly.
Cab & Chassis vehicles require a second kit to complete the emissions delete process. However, there are two kits that can apply, so get out your measuring tape. Measure the distance from the back of the cab to the centre of the rear wheel. If you measure 60", then also order part# FP21124. If the measurement is MORE than 60", order part# FP21125.