2.25 piping to 2.5 piping Diff?

v6 stunna · March 10th, 2011, 12:33 AM

i have 2.25 piping all threw my exhaust. with a custom H pipe 2 HF cats and 2 deleted cats. going into spintech 9000 series side exhaust with 3in tips. would going 2.5 piping from my bbk shortie headers make any difference in sound or anything?

1slowv6 · March 10th, 2011, 01:24 AM

well if you think about it maybe 3" piping all the way through would make a diference but 2.5 is only 1/8th of an inch wider on either side of the pipe so its not going to make much of a difference if any at all but should improve flow overall through the system...

robb15033 · March 10th, 2011, 01:50 AM

You will improve flow but loose your ass on low end torque. Exceptions are blowers, larger internals and large HP applications in general. 2.25" pipe with free flow cats, dual exhaust and aftermarket mufflers is sufficient.
But then people do run 2.5" full exhaust systems on the v6 all the time with no problem dealing with the low end power loss.
I couldn't stand it, drove me crazy. I waited two weeks and ran 2.25" mid pipe for most of the total length and then custom welded 2.5" pipe 10 inches before feeding into the mufflers. Still wasn't satisfied until I installed the VAP intake spacer. I'm now very happy with acceleration through 1st-3rd gears.

6ER THEN I 8ER! · March 10th, 2011, 02:56 AM

Originally Posted by robb15033

You will improve flow but loose your ass on low end torque. Exceptions are blowers, larger internals and large HP applications in general. 2.25" pipe with free flow cats, dual exhaust and aftermarket mufflers is sufficient.
But then people do run 2.5" full exhaust systems on the v6 all the time with no problem dealing with the low end power loss.
I couldn't stand it, drove me crazy. I waited two weeks and ran 2.25" mid pipe for most of the total length and then custom welded 2.5" pipe 10 inches before feeding into the mufflers. Still wasn't satisfied until I installed the VAP intake spacer. I'm now very happy with acceleration through 1st-3rd gears.

understand that you have a single port v6....the way your car took the tq loss compared to his tq loss would be way different...

@the op...side exhaust..good luck is all i have to say

v6 stunna · March 10th, 2011, 11:05 AM

i have side exhaust already but anyways about exhaust size. i was in the okc last weekend for high school state basketball and ran across a 94 302 boss procharger! yellow with black soft top, i had all forigned guts, new tranny and all. he said it had about 600 horse. it sure sounded like it..he had a miled cam but he said his exhaust was 4" into cherry bomb dumps..it was a sweet amazing fast car but with ugly color

March 10th, 2011, 12:33 AM	#1
v6 stunna Regular 2000 v6 Join Date: Jul 2010 Location: forgan ok Posts: 396 iTrader: 0 reviews	2.25 piping to 2.5 piping Diff? i have 2.25 piping all threw my exhaust. with a custom H pipe 2 HF cats and 2 deleted cats. going into spintech 9000 series side exhaust with 3in tips. would going 2.5 piping from my bbk shortie headers make any difference in sound or anything?

March 10th, 2011, 01:24 AM	#2
1slowv6 Enthusiast 2000 v6 mustang Join Date: Nov 2010 Location: St. petersburg FL Posts: 738 iTrader: 1 reviews	well if you think about it maybe 3" piping all the way through would make a diference but 2.5 is only 1/8th of an inch wider on either side of the pipe so its not going to make much of a difference if any at all but should improve flow overall through the system... __________________ If Nissan motorsports is Nismo..Wouldn't Honda motorsports be Homo?

March 10th, 2011, 01:50 AM	#3
robb15033 Regular 1997 Mustang 3.8 Join Date: Oct 2010 Location: Northern Virginia Posts: 216 iTrader: 0 reviews	You will improve flow but loose your ass on low end torque. Exceptions are blowers, larger internals and large HP applications in general. 2.25" pipe with free flow cats, dual exhaust and aftermarket mufflers is sufficient. But then people do run 2.5" full exhaust systems on the v6 all the time with no problem dealing with the low end power loss. I couldn't stand it, drove me crazy. I waited two weeks and ran 2.25" mid pipe for most of the total length and then custom welded 2.5" pipe 10 inches before feeding into the mufflers. Still wasn't satisfied until I installed the VAP intake spacer. I'm now very happy with acceleration through 1st-3rd gears. __________________ '97 3.8 MODIFIED

Threads Similar to: 2.25 piping to 2.5 piping Diff?
Thread	Thread Starter	Forum	Replies	Last Post
Intercooler piping??	F8L GT	99-04	5	October 12th, 2009 07:41 AM
Mid piping	bandity2k00	99-04	21	May 18th, 2009 11:59 PM
TWR Piping	Cricket	Southeast	1	February 20th, 2008 05:32 PM
what size piping is best?	dgt_mustang	V6 Mustangs	64	January 3rd, 2008 02:52 PM
'67 piping	Xman	Classic Mustangs	5	April 26th, 2007 05:28 PM

March 10th, 2011, 11:05 AM	#5
v6 stunna Regular 2000 v6 Join Date: Jul 2010 Location: forgan ok Posts: 396 iTrader: 0 reviews	i have side exhaust already but anyways about exhaust size. i was in the okc last weekend for high school state basketball and ran across a 94 302 boss procharger! yellow with black soft top, i had all forigned guts, new tranny and all. he said it had about 600 horse. it sure sounded like it..he had a miled cam but he said his exhaust was 4" into cherry bomb dumps..it was a sweet amazing fast car but with ugly color

Remove Advertisements Sponsored Links
Ford Mustang Forum Advertisement

All times are GMT -4. The time now is 07:07 PM.
Contact Us - Modded Mustangs : Ford Mustang Forums - Privacy Statement - Top
Modded Mustangs is ©2005-2008, All Rights Reserved, And is Not Affiliated with Ford Motor Company. Forum is powered by vBulletin ©2000 - 2012, Jelsoft Ent. Ltd. & SEO by vBSEO 3.3.2 ©2009, Crawlability, Inc.