D15B2 is from 88-91 CRX DX, 88-91 Civic DX or LX - the correct ECU for the D15B2 is PM5 - the ECU for the D15B1 is a PM9 and would work, but not as well as the PM5 since the D15B1 is the 70 hp STD engine - the PM6 from the CRX Si and Civic Si or EX will not work - the PM8 from the CRX HF will not work