The K20A3 such as CRV/accord/element k24a doesn't have a normal DOHC VTEC valvetrain as we understand it with the B-series engines - the K20A3 should actually be known as a "DOHC i-VTEC-E" engine, mainly because it takes advantage of a VTEC-E cam setup. This warranty is issue to modifications and https://dallasuqlfa.nizarblog.com/26965278/nissan-skyline-engines-an-overview