Hasport K-Series intake manifold adapter plate for K24 head to run K20 intake manifold - K-INADK Series intake manifold adapter plate for use with RSX intake manifold. For use with K24A2, K24A4, and K20Z3 cylinder heads. Hasport Bushing Guide U62A (Street) is best for most street applications and many road race applications. Stiffer than stock with the least noise, vibration and harmonics. U70A (Race) is about the maximum needed for hard core road racing applications. It also works well for the occasional drag racer a long as you arent