Can you use the K20A2 head with this Block without haveing to do like LS/VTEC? Will the Specs change, K24A2 [email protected] [email protected] 10.5:1 TSX 5spd 2.41. What about the compression chamber, will the bull be to small for the k24 block vs the k20 head? Would there be any other change when swapping with a stock TSX engine> Importrza: You WILL need to change the intake manifold and throttle body. b/c the tsx is drive by wire, also you will need to block off a coolant passage when you swap intake manifolds.