i have a soon to be boosted LS.I'm gonna make a "flex pipe" i guess you could call it, out of exhaust repair kit...as seen here https://honda-tech.com/zerothread?id=155616 . i will be ordering a 3" thermal in about 2 weeks. I need to make the flange that hooks up to the exhaust...but i'd like to have it made before my exhaust comes in so i dont have to wait to put it on. Anyway i can tell an exhaust shop waht size flange i need.....or am i just going to have to wait till my exhaust comes in and bring it to them? Thanks

 

Try SummitRacing.com
For 3" to 3" (if you have a 3" downpipe & flex)
part # SUM-G4752
or
part # SUM-G4752SS if you prefer stainless.

For 2.5" to 3"
part # SUM-G4754
or
part # SUM-G4754SS for stainless
You get 2 of 'em, so you can give one to your friend.


[Modified by The Mick, 11:46 PM 4/8/2002]

 

does the flex come before or after the flange?

 

i see 3" to 2.5 inch exhaust, but i need 2.5" downpipe to 3" exhaust...i cant seem to find it on there.

 

I know this will blow your mind but all you have to do it turn it around

 

Hehe, no, these are one-way directional flanges...

 

I am not sure but do you need a reducer donut or someting? Chrysler has a donut reducer from 3 to 2.5", dont remember what car it came off though.

 

no......i need the flange to bolt up to the 3" side and the 2.5 inch pipe to be open....

 

The 2.5" to 3" flange I listed above should do the trick. Just bolt that flange to your 3" exhaust, then use some 2.5" flex tube as seen in the pic in this link: http://imglib.************/index.cgi?cmd=view&id=2396 Connect one end of the flex tube to the 2.5" downpipe with a U-bolt, and use another U-bolt to connect the 2.5" flex tube to the 2.5" - 3" flange I listed above... just like in Dustin's pic.
Unless I'm missing something.

 

ahh i see what your saying. just one question...is that bolt pattern for the flange universal?like will it def. bolt up to my 3"thermal?

 

http://imglib.************/index.cgi?...wimage&id=3131

from this pic, it looks like the summit 3" flange will bolt on to the thermal.

 

The one that comes with the Thermal has a 3" hole with a 4" diameter bolt circle. (from the center of the 3" hole to the center of one of the small holes on the flange is 2")
Your 3" Thermal exhaust should have one of these provided. But, if you can't wait, that should be the info you need to be sure you're ordering the right one from Summit (or whoever).


[Modified by The Mick, 12:09 AM 4/15/2002]