[stelly1227]

Would running 3"dual straight pipes on my 01 dmax hurt performance and/or fuel mileage?

 

[Tigger]

I think the 2001 is like my 2003, comes stock with 3.5 inch. I just had my muffler cut off the other day and I am running single straight pipe.

It is louder, by a little bit, but I can tell it spools up faster.

Why do you want to go 3 inch?

 

[theunderlord]

if you're going to upgrade, 4" at least.

 

[stelly1227]

Well I can't find a place around here that bends 4" they can only bend up to 3". I'd like to go 4"

 

[theunderlord]

Dude. Just buy it.

 

[stelly1227]

I'm impacient and cheap. Lol

 

[theunderlord]

300 bucks is pretty cheap! Ask around to some of the vendors if they have something in stock for you.

 

[DMAXchris]

Dude. Just buy it.

x2.

You cant have straight duals on a Duramax. There is only 1 pipe that comes off the turbo. 3" would be smaller than stock also.

 

[stelly1227]

U have to put a y after the trubo. I know 3" is smaller that's why I was wondering if it would hurt. I'd rather go 4"

 

[Tigger]

For $299, I bet the custom exhaust you are hunting would be about the same. Although duals does look good.

 

[stelly1227]

Thanks for the input. I'm going to talk around with some of the vendors and see what they got. If anyone knows of some good ones let me know. And thanks again

 

[DMAXchris]

Just to clear it up....diesel trucks that you see with dual pipes only have 1 pipe that runs the length of the truck, then it splits before the rear axle.

 

[DSTRBD]

Stick with 4", 3" doesnt belong on a diesel. Check our site, we have some pretty sick deals going right now on exhaust systems.

 

[maxedout2004]

if you put the spliter close enough to the turbo then the dual 3" will actually be 6" of exaust. i think it will help. I removed the muffler from mine and gained @1 mpg and did feel a bit of gain on performance.