I know the first thing you guys are going to say is it's not worth the money. Well I can't bring myself, after spending $428 on headers, to choke the exhaust down to one tube only to seperate it out after the muffler so I can have dual tips. Any way I'm wondering whats the best way to run duals? I want to run 2 1/4 inch pipe and I really want both tips to come out under the rear bumper. Any ideas would be great!!!!

 

2 cats 2 mufflers, if you dont have to smog, 2 cats and straight pipes

 

It's not worth the money.

But, if you're insisting on doing it, make sure you don't go too large on your pipes. The 3.0 needs some backpressure to operate properly. Also, there is no such thing as true duals. A proper exhaust has a X-over pipe midstream to allow one cylinder bank to scavenge from the other.

 

x2 got to have a little back pressure. the x-pipe helps quite a bit and makes it sound better,

 

I wonder how true duals would affect the O2 sensor circuit?

 

I like the Idea of an X pipe! I never thought of it I was going to use an H pipe. Would dual 2.25 be enough back pressure?

 

considering I've seen 2.25" x-pipes on 5.0 mustangs, and no benefit, other than a louder 'growl' in the exhaust, I'd wonder about the efficacy of 2.25" pipe on a 3.0.

 

Remember that with a set of properly designed headers, you time the pulses so they are not on top of each other - this helps a smaller exhaust system handle the flow a lot better.

If you have smog, you're gonna be stuck with one O2 sensor and one cat, so you need to check the laws for your state first.

 

Duel exhaust on a 3vze? Thats cute.....

You only need one SINGLE 2.25" pipe. Thats more then enough for this engine. Anything bigger will hurt your performance...but hey. I guess it might look cool.....

 

I would think that you'd be fine running a single O2 sensor in one of the two pipes. The O2 sensor measures the amount % of O2 in the exhaust, it doesn't measure exhaust flow or anything else.

 

@Matt16-
so you're okay with the ECU sampling 1/2 your engine in order to determine the best fuel ratio for the whole engine...
... the O2 isn't seeing what is happening with the other 1/2...

So, you're okay with running lean in one cylinder and blowing the engine because the O2 is looking the other direction?

Not saying it would happen, but rather 'could'.

 

thats why you run an x-pipe with the o2 in the middle

 

and doesn't the 3.0 have an O2 in front of the cat, and another behind the cat?

 

and if you're willing to siamese the runners for the cat and O2, then why run duals?

answer- there is no benefit in doing it that way.

we're talking about an engine with 3.0 displacement. 2.25 tubing, DOM bent, is more then enough.
V6 duals always sound like rice anyways.

 

x-pipe, h-pipe, w/e, they do basically the same thing just the x-pipe is smoother. good luck finding a good place for it. might have to be off set of the gas tank back by where the old muffler was...maybe?

 

Nope. Only the california spec'd trucks have duel o2 sensors.

 

I suppose you could place the O2 sensor at the x junction in the duel pipe. I don't think the two banks would ever receive different mixtures, unless something is seriously wrong anyways ie: dead cylinder, clogged injector, failed cold start injector. Basically, I think you'd be fine barring the strangest of circumstances.

 

Here's a sketch of what I would do/will do.

 

so let me get this straight. You are will to spend, im sorry, waste money to achieve 1/2 hp out of a 3.0.. maybe.



Dude, its not a chevy

 

Wow you guys sure can kill a mans dream, but you do raise alot of good points. Maybe I should just leave well enough alone and do a Y-pipe into a Hi-Flow cat and Cherry Bomb extreme (or Super 40 Haven't decided yet). I just thought i might be able to achieve a Deeper more aggressive tone with true duals.