Graves Motorsports KawasakiZX-4RR / ZX-4RVelocity Stack Kit.Developed by our multi time championship winning racing engineers. No cutting / altering / bonding required.These stacks straighten out the power curve while improving low, mid and top end torque and horsepower.Designed to smooth out the power curve, increase horsepower throughout and improve fuel efficiency. The version 2 stacks are best suited for stock engines and bolt on performance parts like exhaust systems.

FITMENT:2023 + Kawasaki ZX-4RR / ZX-4R