Exhaust Diameter

bildo16 · Post by **bildo16** » Tue Jun 26, 2007 9:47 pm

Since i am now "ballin" with my new job. i am ditching my megan racing axle section in favor for something a little nicer. my megan racing was 2.5 piping, and the new exhaust is 60.5 mm. the 2.5 inches translates into 63.5 mm, do you think i will have a problem bolting the flanges up together?(2.25 inches=57.15mm) TIA!!!!

RyanA · Post by **RyanA** » Sun Jul 08, 2007 12:10 am

As long as the center to center measurement on the bolt holes is the same, you're fine.

JustRob · Post by **JustRob** » Mon Jul 09, 2007 12:19 am

Fitment of the exhaust isn't about the piping, it's about the flange. As long as the exhaust is for a USDM Integra, you'll be fine.

bildo16 · Post by **bildo16** » Mon Jul 09, 2007 2:18 am

the thing is that im bolting two aftermarket pieces together, so i guess itll be hit or miss. a little customizing never hurt anyone.

.Smitty. · Post by **.Smitty.** » Wed Sep 12, 2007 1:08 am

I don't mean to bump such an old thread, but isn't it a bad idea to go from a larger diameter exhaust to a smaller dia.? As in, creating a bottleneck. But I guess the difference is pretty minimal between the two. And it depends on your mods and how much exhaust gas you need to be flowing through the new piping size.

Again, it's probably already bolted up and everything, but I asked just for personal knowledge.

Post by **budget_crx** » Wed Sep 12, 2007 1:20 am

bottlenecks suck but are still better than just a completely small diameter system, at least on FI cars

.Smitty. · Post by **.Smitty.** » Wed Sep 12, 2007 1:55 pm

True. My point was, without aiming this at bildo, it'd be a better decision to just get another 2.5" piping exhaust to mate with the 2.5" before the axle.

Oh well, the topic's over anyways.