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so having a 2" 4-2-1 header straight to the cat would be the best choice and afterwards i can go up to 2.5" straight out without any powerloss at low and high rpm then right? it wouldn't have any effect on performance at that point out?

do headers come with inlet and outlet same size or different sizes at each end at all times?

which side of the header is the inlet and which is the outlet?

another question. 1.75 outlet 2" inlet would that be a good option?

thank you for all the help. from what i understand the 2.5" would rob me of power so now i'll set out to find me a nice 2" straight through.

i found a header to buy, the guy said the inlet is 2.5". does this mean that its 2.5" where it bolts on to the engine and the piping size is different or is the piping 2.5" from where it bolts on to the motor straight to the other end of the header?

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...

i have no idea what you just said sooo yeahh...

thanks guys. going to research IAT sensor now. yes the engine bay needs to be cleaned very badly...you should see the rest of the car lol. body work and spray needed

ty...1 down 1 to go

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...

like seriously, no-one gonna answer?

ok so if i don't need the resistor box then what do i need? or is this set up suppose to work fine with no hiccups?

ok, so obd1 injectors, still can't find a resistor box unless i'm completely retarded or i need to jack up the car and look from underneath, obd0 distributor... these all seem like different generations of miss-matched parts that can work just slapped on, i want to know what needs to be...

electrical problems include: a short in electrical wiring, if i leave the battery terminal connected over night the battery runs down but if i reconnect everytime i use the car it'll work just fine. temp gauge doesn't work its always says down like the car is off gas gauge doesn't work...

ok...where is the resistor box again? specific location or best as possible please and if these are obd1 injectors what are the major differences between them and obd0...i was of the assumption that injectors were just injectors until upgrading

translation please DPFI MPFI the car runs just not as how a car should run i can tell you that much

its 1am, just went 3stories down around the back of the apartment building to the car just to take a few more engine bay pics and see the colour the distributor plugs. they are cream colored, checked all over engine bay still no resistor box. so that means i'm running obd0 then?

as far as i know it doesn't have a resistor box...how do i go about knowing what obd the distributor is along with injectors?

when i bought the car the previous owner mentioned that the motor was from an integra (don't remember the year). i got from a friend some time ago a p76ecu, never installed it but now i'm thinking could one of the reasons for some of the problems i'm having is that the dizzy is a obd1 dizzy and...