OK i have a 98 Civic Hatch SRY IF THIS IS A REPOST BUT I DID SEARCH FOR 2 DAYS AND NOTHING . I wanted to kno the exact size of these stock mufflers since i have a swap in my car it rattles since their is back pressure and it is SMALL STOCK PIPING.

Well 1st off my stock piping

2nd EX Coupe Piping

3rd SI Coupe Piping

Cuz i have a OFFER FOR A SI and EX wanted to kno if their different or the same THANK H-t SRY IF REPOST but I need help and alot of ppl as well

 

I'm pretty sure they're the same and both 2.25".

Though bump for ya man

 

i dunno about si's but my stock ex piping was about 1.75''

 

really cuz my friends stock EX looks a little bigger than usual but yea anyone kno like a site that shows actual sizes i tried honda parts and stuff but only part no sizes thanks HT!!!!

 

well, i searched "OEM exhaust" and the very top of the list was a ex coupe pipe and muffler for sale, and a hatchback pipe and muffler for sale. i asked both sellers to measure the inside diameter of the pipe guess we will find out shortly.

 

thanks