Ok I have a 91 prelude si with the B21A1 now I have already ran into trouble trying to distinguish the difference between my SI and the 2.0 SI and the 2dr Coupe SI (like at the insurance office and the bank) when we were trying to figure out which one it was. I know what kind of car and engine it is and all that stuff, but Is the 2.1 a rare engine or what? will I be able to find headers, etc... if not what kind of headers will I need to use?

 

No, it's not rare. there's plenty of parts out there. most everything for a B20A will work fine on the B21A, except for the header. The B21A uses a 4 wire O2 sensor on the down pipe, whereas the B20A uses 2 single wire O2 sensors on the manifold.

 

man this sucks, I know I'm not gonna be able to make any cold air intake for my lude, Guess I'm gonna have to wait till I get the H22 for that. Also, could someone tell me what kind of oil to use on the manual transmission for my 91 SI, because the guy who changed the axle before me used thick oil and I think it is messin with the synchros.

I'm just curious about somethin else too, In my prelude the shift lever is hella weird, instead of being tilted towards me more it's like flat and I have to shift straight up and down. I'm still gettin used to it but sometimes when i punch it and try to switch to second it grinds, you guys think this is because im not used to it or what? how can I tell if it's me or the car. Shit, I just remembered somethin else. Ok when I have the car in gear and I have the clutch in, and I rev it, even just a little, the clutch feels a little scratchy. Could someone tell me what this might be? the clutch still grabs good and I can still chirp 2nd easily but why does it feel scratchy when I push it and rev it in gear? any info would be cool thanks

 

can someone at least tell me what kind of oil to use on my manual tranny?

 

If you are ever in las vegas you should look up maximum performance they will make an intake for you and it should be around $150. They will customize alot of stuff for your car.