at what point do you grow out of single 3" exhaust?

[TXsilverado]

Im fixing to either have a new Y pipe made, or completely redo my exhaust from the headers back…

At what point do you outgrow single exhaust? I have a 5.7 LS1 with patriot stage 2 LS6 heads, 231/239 111+2 cam, a ported fast 90mm intake, pacesetters, functional ram air and full bolt on’s all the way around it. Last time on the dyno it put down 430 to the ground. Since then ive added the ported fast 90mm. it also has 2 nitrous kits on it and eventually will hit a 250 shot. I know I am leaving some power on the table with my current Y pipe. It was the first gen pacesetter setup and the drivers portion of the ORY T’s into the passenger side instead of merging into the exhaust as a Y. here are some insane paint skills for illustration



anyways, I can either build the Y pipe that I want to free up some power, or go for a true dual setup with an X and some 18” long dynomax bullets (biggest they make). Am I making enough power to justify a 3” true dual x-pipe setup?

[DBRODS]

IMO you should be thinking about duals with around 450rwhp NA. Dual 3" will really shine in the upper rpms especially with the nitrous.

[TXsilverado]

bottom end should stay about the same right? especially with my converter.

[DBRODS]

I think if you lost anything down low it wouldn't be noticable.

[sprayedenali]

Especially with the torque of nitrous you won't lose abythig IMO. I'd rather have too much exhaust than too little if it cam down to it too...

[Frenchy]

Anything's gotta be better than that y-pipe. There's always the single 4" option too

[txarkitekt]

Wow Stew, what are you--12 yrs old? Nice pics man! J/K.

I honestly think you have enough to justify the dual 3" setup. You might notice a TAD of a low end difference, but not enough to write home about.

Do the same exhaust routing that the 6.0L trucks run with the dynomax bullets.

[truckinL33]

I honestly think you have enough to justify the dual 3" setup. You might notice a TAD of a low end difference, but not enough to write home about.

Who would write home about losing low end on their truck after an exhaust upgrade? That's crazy talk!

[farmtruc]

If it helps:

Had a G8 in here, did some mods along with a cam.
Put 422hp down, I think.
But was I did remember was, we swapped out the 1 5/8 headers for 1 3/4" headers, had straight dual, no exhaust.
The car lost power, down to 415hp with larger exhaust.
Downlow, the loss in power was noticable.

Customer cam back, we put on his stock mufflers (will with big headers and catless mid pipes) and the car picked up the lowend sotp.

I think the car didn't have enough power to justify the large headers and straight exhaust.

I do like how the aftermarket new camaro exhaust is, big pipes all the to the middle of the car, then they back it down to 2.5" after that, out the back.

[st8kfinger]

this would work