i Purchased a greddy sp2 exhaust not too long ago and i was under the impression that it was cat back. wehn i received the package i opened it up to find only the rear section exhaust. i called greddy and they informed me that they dont make a cat-back exhaust system for the xb.....something about everything is welded together or somethin like that. i was just wondering what kind of work and money is involved is customizing that section of of pipe (from my dc sports header-to the axel back)?????

 

do a two inch mandrel bend exhaust tubing with a 2" in and out magnaflow resonator... for your mid pipe

 

you can also buy a obx midpipe and get that welded.

 

Coming from your header you have; 2 inch piping, pre-cat O2 sensor bung, Cat., post-cat O2 sensor, 2 inch piping into resonator, the resonator itself, 1 3/4 piping out the resonator going to the rear axel where your exhaust bolts up everything is indeed welded together where on most cars the mid pipe usualy bolts up to your cat. xA/xB owners got screwed. You could go to a muffler shop and have 2 inch piping done from the cat back but you would have to use the OEM connection for your muffler since its a secific type, which would render your piping since its Diameter is still 3/4. You real alternative is to not use the OEM connection at the rear axel by welding it all together or using a generic flange. either way its a lot of work just to make the car annoying and loud. I did it and I regret it.

 

so then its basically alot of work for really no improvement in performance? i kinda figured that...with such a tiny motor im trying to get all that i can out of it

 

yall got it wrong...

from the header to the cat its 2.5inch diameter... from the cat to the resonator its 1.75 inches... and its the same diameter from the resonator to the muffler

 

Are you measuring outside diameter or inside diameter? Because from the header to the cat the walls on the piping is pretty thick.

 

Can anyone confirm the size for me?

Pipe size going into resonator and size coming out of resonator.

thanks....

 

1.75" in and out

header to cat is 2.5" cat to resonator 1.75"

so pretty much that after cat tubing diameter screwed us over

 

If I just wanted to put a cherry bomb in the resonators place or something glass packed like that. I have to have 1.75 inlets then. right?
thanks btw

 

yes 1.75 O.D. for the exhaust tubing

 

So, I could not use a 2 inch inlet cherry bomb?

 

I wanted to do the same thing with a Cherry Bomb glass pack. Let me know how it works out and if you do it.

 

i have a cherry bomb glass pack waiting to be put in, lol, been to lazy to get it done

 

What size cherrybomb do you have? What are your plans?

 

i'm running two resonators a magnaflow and a 12 inch cherry bomb

and my muffler still gives me a nice tone in my exhaust note

 

mines 2" in/out planning to get the rez taken out w/the piping and getting 2" piping from teh glasspack back also flanging the res and glasspack so i can swap em in and out if ever needed