[Kami]

I've been changing my exhaust every so often and now I got the perfect setup. <<JUST FOR YOUR INFORMATION >>
The best exhaust for our cars 2.5NA or 3.0NA is to use 2.25' pipping with high flow muffler (i use dynomax which give you a low deep tone)because they give you very good low end and high end power. 2.5' will lose alot of low end power but give you a bit more high end so to speak give you a better 1/4 mile run. I did my research NASCARs use 2.25 exhaust.

 

[tropiccougar01]

I totally disagree with 2.25" piping. Thats good for the Zetec, but thats way to small for the v6.

 

[Aries]

Isn't 2.25 what the Borla is?

 

[Instigator]

my old pacesetter was 2.25 and i just got a trubendz with 2.5 and my trubendz feels way faster down low and up top:shrug:

 

[ov3n]

2.25 is great for the 2.5's!

 

[DanG]

We're going to need some numbers before we take your word as gospel- It's the price we all pay for too many posers on the board pontificating from their posterior orafice.

The Borla System is 2" with hi-flow components. The Trubendz is 2.5". The 3.0L hybrid, with it's extremely high compression, needs more than this even- My setup is below, pics in the 3L forum. 3" right from the header Y-pipe, all the way through a hi-flow cat & muffler, then swedge down to a 2.5" Trubendz SS system. It's the "best" system for the hybrids, since flow is paramount- The high compression removes most, if not all the need for an amount of restriction in the exhuast to come up with low-end torque.

 

[ND4SPD]

Originally posted by: tropiccougar01
I totally disagree with 2.25" piping. Thats good for the Zetec, but thats way to small for the v6.

and the v6's use 2.50"

does .25" REALLLY make that much of a diffrence? :shrug:

 

[JRJOHNKC]

I find it hard to believe that a small V6 would need 2.5" piping. Hell my Mustang GT had 2.5" and I was told that was plenty big enough. Doesn't an engine need a little bit of back pressure to perform optimally...? :shrug:

Then again, what do i know??? :slap:

 

[BigDaddyTiberius]

Oh crap here comes the backpressure vs no backpressure arguement. :cover: I've been hearing this back and forth since I was 13 reading hotrod magazine in my uncle's garage. I'll put my bid in for a little is good.

 

[SamuraiCougar]

Speaking of exhaust. Can a muffler shop install a tip who's inlet is 2.5" on my exhaust that is 2.25? Like can they stretch the pipe .25"?

 

[Kami]

yes they can do it ... ^.^

 

[LostRacer]

Look at what Daddy Clause found!:tongue: Read up gang for those that haven't already gone over it. :biggrin:

 

[Busted]

Borla kit uses 2.5, just a correction from a previous post..

 

[GrandMasterKhan]

you see your Mustang is also a v8 with True Duals. SO that doesnt serve as a proper comparison. Neither does any other car with True Duals such as a NASCAR. lol thats just so much fun to say...NAASSSCARRRRR

 

[ZetecNinja]

2" pipes for true dual

2.5" for quasi dual

3" single for turbo

2.25" w/ high flow resonator and no rear muffler(s) for zetec

thats how it should be...

 

[Blackcoog]

Borla piping is less then 2.25" I have the system and I have measured the inside of the piping. The outside is 2.25" and inside diamter is about 2". I have it on my 3.0L hybrid and I love the sound of it but I'm going to upgrade to a 2.5" or 3.0" soon.

 

[DanG]

Correct, Blackcoog.

Busted: The Borla cat-back system is 2" ID piping. The Trubendz system with the Borla muffler is 2.5", just as all of his quasi-dual systems.

ZetecNinja: 3" is also recommended for 3L hybrids- Those with ridiculously high compression need the extra breathing room.

 

[SVTCuervo]

I believe (and I've worked with alot of exhaust) the optimal system for the cougar/contour V6 would a Quasi Dual with 2.5inch piping from the Y pipe to the rear split, and then 2 1/4 for the 2 splits Ex. Brullen System. Or 2inch True Duals.