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it seems i need to change out my exhaust system from headers to muffler. it currently has a 4-2-1header with a 2" piping straight through. i was considering to upgrade to a 2.5" seeing as the change has to be done but a friend is telling me that i will be robbed of power from my lil sohc zc. so...

1990 Honda Civic Dx DB6 SOHC ZC Engine Wanna know what this rotting/rusting thing is at the back of my car, just need the name of it. I'm looking to replace seen as it has broken on me once before and i had to weld it back and it looks like it will break again any day now in a different...

1990 honda civic, zc motor with db6 written on the head. my question is, is the db6 a zc motor? i know it sounds noobish but i really can't find much info on the motor. secondly what is the correct ecu for this motor? currently i'm running it on a pm7 obd0 i believe. is this the correct...

Car: 1990 Honda Civic Engine: Sohc ZC Everything is stock, i recently changed ecu to a pm6 as the correct ecu wasn't in there. in fact i still don't know what ecu was in there because it had no markings or indications were all scratched off. Car is running better now but it still feels a bit...

I have a 1990 honda civic dx with a sohc zc motor. i was told by my electrician that my ecu needs to be changed. was checking out which ecu would be best for my car when a few questions started appearing and i could not find a definate yes or no answer or one that would answer my questions...

i have a 1990 honda civic with a SOHC ZC engine inside. lately it has been feeling slower than when i first got it. nothing has been done to the car in regards to performance as i'm currently fixing other problems but i fear that this lack of speed is really another problem in the making. the...