2.5 vs 2.25 diameter exhaust
-
- Posts: 2301
- Joined: Sat Feb 07, 2015 2:31 pm
- Location: Pearland, Texas
Re: 2.5 vs 2.25 diameter exhaust
AND if you're running stock cats, THE restriction is just before the front cat. It's like 1-11/16", or so there, so a 5" cat back is going to do nothing for you.
Gene Beaird,
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2018 Tahoe PPV (her car)
1995 DGGM Impala SS
1985 Firebird - 310 LS1 C Prepared autocross car.
1980 Bluebird Wanderlodge
And some others
Do YOU have my SPID?
Pearland, Texas
2012 Caprice 9C1
1992 B4C 1LE Camaro
2018 Tahoe PPV (her car)
1995 DGGM Impala SS
1985 Firebird - 310 LS1 C Prepared autocross car.
1980 Bluebird Wanderlodge
And some others
Do YOU have my SPID?
Re: 2.5 vs 2.25 diameter exhaust
Not stock cats, i have the JBA catted connection pipes. They meet the 3 inch primary off the header and at some point come down to 2.5 inch. I still have the pup cats on near the diff though
Re: 2.5 vs 2.25 diameter exhaust
there is no pup cat near the diff , the pup cats were right behind the flanges for the mid section next to the trans
you might be talking about the resonators
you might be talking about the resonators
Re: 2.5 vs 2.25 diameter exhaust
What ever these are, are they restrictive??
Re: 2.5 vs 2.25 diameter exhaust
they look like resonators , restrictive minimal
Re: 2.5 vs 2.25 diameter exhaust
I don't know how restrictive the resonators are. I'm working on my exhaust now, so I'll try to cut the pipe off and check them out. But... the pipe going into them is under 2". Mine measured 1.988.
CapriceX2
2011 Caprice 9C3 - TSP 220R W/ DOD delete, 10.8:1 Compression, Custom Stainless Exhaust
1995 Caprice Classic Wagon
1996 K2500 6.5L diesel
2011 Caprice 9C3 - TSP 220R W/ DOD delete, 10.8:1 Compression, Custom Stainless Exhaust
1995 Caprice Classic Wagon
1996 K2500 6.5L diesel
Re: 2.5 vs 2.25 diameter exhaust
Yea!! The up bend after the x pipe that clears that super thin cross brace measures 1.98 OD on mine too. Im on the hunt for camaro exhaust now. 2.25 my ass
Re: 2.5 vs 2.25 diameter exhaust
I put a 2.5 x pipe on after the JBA connection pipes and took an L99 Vert Camaro system into the muffler shop, i used square stock from work and hose clamps to wedge the butterfly valve in the bends around the diff on with same 2.5 cutouts and stock mufflers,,,
Didnt go any faster, sounds better though! Idk maybe i shouldn't have used catted connection pipes lol but yea, the 2.0 vs 2.5 didnt matter on ETs
Didnt go any faster, sounds better though! Idk maybe i shouldn't have used catted connection pipes lol but yea, the 2.0 vs 2.5 didnt matter on ETs
-
- Posts: 134
- Joined: Mon May 17, 2021 10:13 am
Re: 2.5 vs 2.25 diameter exhaust
Lots of info in this thread but does anyone have any known issues with using 3in exhaust tubes and clearance?
I thought about picking up something like this, I don't think the price can be beat. Less than a $20 difference between the 2.5in and 3in exhaust.
https://www.speedwaymotors.com/DIY-Univ ... 76010.html
That way I can make it just like I want it and have full 3in duals with H pipe back to the factory muffler and still have the option to go with a more aggressive aftermarket muffler if I want.
I thought about picking up something like this, I don't think the price can be beat. Less than a $20 difference between the 2.5in and 3in exhaust.
https://www.speedwaymotors.com/DIY-Univ ... 76010.html
That way I can make it just like I want it and have full 3in duals with H pipe back to the factory muffler and still have the option to go with a more aggressive aftermarket muffler if I want.
Re: 2.5 vs 2.25 diameter exhaust
A post from way back, with some measurements... for reference
https://www.newcaprice.com/forum/viewto ... 99+exhaust
Maurice
https://www.newcaprice.com/forum/viewto ... 99+exhaust
Maurice
Maurice Sheil
mhsheil@gmail.com
2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1996 Chevrolet K2500 Extended Cab, long box, 454, 91,000 rust free miles
1974 SJ Grand Prix 455 well optioned with factory moon roof
mhsheil@gmail.com
2011 Caprice Phantom Black 9C3
2012 Impala 9C1
1995 9C1 Caprice
1996 GMC Sierra C1500
1996 Chevrolet K2500 Extended Cab, long box, 454, 91,000 rust free miles
1974 SJ Grand Prix 455 well optioned with factory moon roof