My excuses i am thinking of the F20 series engine in the S2000 , my bad ha ha ha, but the F series engine in the S200 which is a 20C and 22C of the F series engines. The K series isnt the onlee ones with timing chaina. F20-F22C have timing Chanes and so does k series.the F series in the F and K are designed to loose about an inch off the front of the engine.