As the title says, my engine just says b16a. Is that an a1 or a2??
I dunno what year the motor is.

 

You have a JDM B16A.

 

u have a better motor than a b16a1 and b16a2. das all u have to know

 

you have a JDM b16a which is alot better than than a usdm engine. you got lucky.

 

seein as how you may have an sir, or sir-II b16a, heres somethings you can check for:

-SiR II has a hydro tranny, not a cable.
-SiR II has a single- 4-wire O2 sensor instead of 2-single wire O2 sensors.
-SiR II's MAP sensor is internal (on the throttle body), not an external one with a tube.
-SiR II harnesses are grey. SiR has cream colored ones.
-SiR II are MPFI, whereas SiR's are PGM-FI (as labelled on the Intake Manifold)
-SiR valve covers have "DOHC" written in a larger font size than "VTEC"
-SiR II valve covers have "VTEC" written in a larger font size than "DOHC"