PPG DogBox RSX K-Series All MotorDescription: This is a direct fitment gearset for racers looking for closer ratio's between 1st and 3rd gears while increasing strength and durability. Straight cut gears reduce drivetrain power loss and are design using the same profiles as the PPG drag sets. These sets are not only strong but also versatile in both the street and track environments. **After ordering, please email us if your order is for a K20A2 or K20Z1. Includes: PPG set 1st 4th