Im planning on going 2.5 inch dumped duals x pipe with some bullets. Now I know 2.5 is good say up to 500 hp but my question is will there be any noticeable difference in sound between 2.5 and 3? Plus my car isn't lowered and down plan on getting above 450 horse. Stock gears as of now. Is there a benefit of 1 over the other?

 

i wouldnt know any sound difference but im assuming your headers are going to be 3" collectors? why not just run it 3" all the way through, i also plan on getting the same setup as soon as i can get some money for it.

 

I run 3 inch duals and wouldnt have it any other way

 

Ya the headers r three inch but I hear it's almost overkill with complete three inch on it and it loses a lot of "butt dyno" down low

 

FWIW i went from 3" true duals to a catted-Y with a bullet muffler dumped before the axle and i can tell a difference in torque on hills and in low rpm.....seems like i may have lost a tiny bit of pull up top, but gained in torque from 2000-4500rpm.....when my car was dyno'ed i made 401 rwhp, but only 357 rwtq with the duals.....maybe 3" duals is a little overkill for a stock head, cam+bolt on DD....others probably already knew that but i was surprised.....if i had more mods or a stroker, i'd definitely go back to TD's

 

Not at all. **** mine started out as a bolt on lt1 with 3 inch duals. sounded mean and felt great

 

no need for 3 inch exhaust unless you're gonna run it all the way to the back. 2.5 is good for dumps and low hp street car.i had 2.5 pipes with 3 inch mufflers it felt better and louder then the 2.5 mufflers.also drove a camaro with 3inch exhaust dump before axle.400hp car alot of cabin noise on low rpm and speed.if i was you i would do a 2.5 exhaust with magnaflow x pipe and spintech mufflers or some borla i had experience with both mufflers and they sound good.

 

Thanks man I was thinking 2.5 would be enough I plan to cam it sometime like a 228r and figured 2.5 could handle that

 

If I was to get the 2.5 should I get 2.5 inlet and outlet bullets? Will that sound different that 3 inch inlet and outlet?

 

The 3 inch inlet and outlet wont hurt, but its just more work to be done with expanding the pipe to fit

 

I love this thread already..

 

I've had it both ways. Running 2.5" now just so I could run under the axle. I have plenty of room though, if I would've known that I would've just kept it at 3". No difference at all in sound/performance..NONE. A 1/2" is hardly even worth talking about when it comes to flow/sound/performance. Add a super charger, turbo, nitrious with all other bolt-ons, then you might want to consider that extra 1/2".

 

Can't tell if serious.. bc I hear from many people 3 inch is overkill on mostly stock ls1 then I hear from others you will not be happy with 2.5 inch..

 

Thanks ya I knew you would have to expand it just didnt know if somehow it would make a difference besides that.

 

Also what length bullets do you guys recommend?