Hi every1. Im pretty much new to all these cars stuff. I just got into it cuz i just got my first car so if you guys can bare with me and help me i really really appreciated. my integra is a 2000 ls 5spd. i've notice many people start fixing up their car with intakes and headers and exhaust. My question is, do any of you guys here know the collector diameter (size) for most of the brand name headers for my integra? for example, how big is the outlet of mugen? toda? 4-1 dc ? mega? spoon ? etc. Im askin this because i want a high flow cat but i dont know which cat and what size to get since i dont know any of the size for these header.

Im planning to get headers -- hi-flow cat -- mid pipe (im gonna need suggestion there soon too... like wut kind and stuffs) -- and spoon n1 muffler . Can u guys gimme some inputs and comments and anything would be nice . Thanks

 

I suppose I could try to help you out. Most colectors are 2.5 inches. Your best bet is to buy one, take the specs(diameter) when you buy it and go find a high flow cat. I wouldn't put a gay rice muffler on there. So choose wisely. Research to find out what other people have done.

 

Most headers will have a 2.5" or 2.25" flange. As for the catalytic converter, I have, and really like my Random Technology cat. Decide what your goals are before you buy anything.

 

Wow thanks guys