WhitePhoenix99

iTrader: (12)

What are you guys running for pipe diameter? I was planning on going with 3" but I think it might be a bit much for just a bolt-on lt1. Anyone running 2 1'2"?

tspence45

iTrader: (30)

I'm running 2.5". It's more than enough for a bolt-on LT1. I forgot what each piping diameter was good too for power.

WhitePhoenix99

iTrader: (12)

That's what I was thinking. What kind of an x-pipe are you running?

tspence45

iTrader: (30)

Jegs universal x-pipe. Most people run that or Summit. The kit's exactly the same, and the same price. So, whichever company you'd rather order from, go for it.

LT1

iTrader: (1)

3 inch X pipe from summit, mine is just bolt-on sounds and performs good.

WhitePhoenix99

iTrader: (12)

I've heard the 3" is deeper sounding, I would think it wouldn't be as efficient as 2 1/2" with the power output I'm currently making though.

hitmanws6

iTrader: (20)

3 inch piping on true duals is good for over 500 hp for zero loss. it is deeper sounding than 2.5 in

Crows93Z

iTrader: (1)

3" will take away a little low end torque i felt. 2 1/2" sounds great and performs great, and you don't lose as much ground clearance.

camar0corey

iTrader: (22)

Running 2.5" summit h-pipe.

myltwon

iTrader: (1)

imo 2.5", sounds better, less obnoxious for DDing, and better ground clearance.

A 2.75” (stock) single system is good for a 310hp engine with zero loss…
A 3” Single system is good for a 370hp engine with zero loss…
A 3.5” Single system is good for a 503hp engine with zero loss…
A 4” Single system is good for a 657hp engine with zero loss…
A 2.25” dual system is good for a 457hp engine with zero loss…
A 2.5” dual system is good for a 513hp engine with zero loss…
A 3” dual system is good for a 812hp engine with zero loss…

hitmanws6

iTrader: (20)

lol i got mixed up on my measurements

StealthFormula

iTrader: (35)

I'm running a 2.5" X-pipe. I'm running 2.5" over 3" because my car is lowered and its easier to fab it up real close to the body with that diameter. Either one is way better than a 3" Y-Pipe setup so you can't go wrong.

WhitePhoenix99

iTrader: (12)

Thanks for the info guys, 2 1/2" sounds like my best bet. . hmmm I wonder if my exhaust shop could fab up an x-pipe a little cheaper than a summit or jegs kit. Anybody have a custom x-pipe?

1996firebirdformula

iTrader: (3)

Did you go to staples muffler shop in north vernon there? I had a truck done there few years ago for TDs. But they didn't know how much exhaust for formula was gonna be.

zlicious94

iTrader: (1)

x2 on stealth's reply cause ground clearance is already a biatch with 2.5"

WhitePhoenix99

iTrader: (12)

Yeah I get all my exhaust work done there, I've been in there quite a few times with this and my previous car. I havn't had the duals priced yet, I'm gonna wait until I'm closer to being done with the header/converter install. I can let you know how much it costs if you're interested.

hitmanws6

iTrader: (20)

try the magnaflow x pipe from ws6store

WhitePhoenix99

iTrader: (12)

That's more expensive than the summit/jegs x-pipe kit.

BlackLT1Z

iTrader: (11)

Summit is having a sale on all Summit brand parts.... 2-% off. I got the 3" kit for 84$ and the CVR ewp for 140$.

rocket22

iTrader: (2)

What are you guys running mufflers?