Diabloformula

I'll probally do what you did with yours and open it up and clean it up, lucky I work at a trans shop so welding and all that stuff isn't an issue. Like you said fitment will be my next problem.

I ordered mine last week, shipped pretty fast, which was nice. Ya, us LS1 guys deserve all the crap must be the horsepower output.

ghettocruiser

iTrader: (4)

Here's a better look at my clearance now. Thats with a cut out...this is what it SHOULD be like using the pre-made stuff. My car has about 1.5" of drop too...



Matter of fact...look at this pic of the underside of the pass. side pipes. Note, the passenger side didnt hang as low as the driver. See that big concave dimple? No idea how you get a dent like that, but it happened.



On a side note...I definetly recommend that flowmaster merge collector thats in that picture. That thing is awesome. Just wish they came in stainless...thats the only part of my system thats not stainless from the headers to the tips. Those are all the parts I got for my y-pipe minus the clamps. All magnaflow mandrel bent, flowmaster merge (2.5 - 3), and a QTP stainless cutout that was absolutely BEAUTIFUL inside and out. Hated to put it under.

Car is actually at a shop...but he is getting an error when trying to download the tune. He is thinking the PCM is locked...which SUCKS...Ill find out today for sure. Either he figured it out, or Im driving an hour to pick it up with nothing done.

J.

stage20

iTrader: (3)

nice work on the y pipe.
x member loooks even better!
i actually prefer a magnaflow or a howe brand y pipe, but the flowmaster is miles ahead of 2 pipes welded together(pun at hawks)
looks like the crossmember would be a extremely tight fit on an automatic car.
awesome job!

Diabloformula

What I started with.........

Diabloformula

What I ended with..........

ghettocruiser

iTrader: (4)

Nice job smoothing that out. Youre right...yours wasnt as bad as mine. I just hope you have better luck with the rest of the fitting. Because mine wasnt just alittle off... it plain old wouldnt fit.

Definetly take some pics when you try to install the y-pipe.

J.

Diabloformula

Well I'll be putting the exhaust in next week sometime so we'll see what happens, I'll also post up pics as well.

ghettocruiser

iTrader: (4)

So much for progress guys....

https://www.thirdgen.org/forums/body...ml#post3435576

Bradlyj8Z28

iTrader: (2)

Okay, I know everyone is talking about LT headers, but I had to ask, how are the y pipes run for those of us running the stock LS1 manifolds?

ghettocruiser

iTrader: (4)

Hmm...not that many people doing that. Most go for the LTs. But, I imagine with the stock manifolds, you could run the y-pipe similar to the stock routing. The trans crossmember shouldnt matter at that point... Its been so long since I saw mine with stock exhaust, that I dont remember... haha.


Im sure someone can chime in and hook you up with some info...but if you search and look at the stickies real good, you might dig something up on it.

J.

FullSendRacing

ghetto - the info you posted is very helpful so thanks. I'm trying to get my ducks in a row for an ls1 swap and I currently have a spohn TA and x-member. It's looking like a double hump and custom y is the way to go and I'm wondering whether to hack up the spohn piece or make one from scratch. Did you have to modify the SW collectors in any way?

Not that I need it as 3.5" cat-back should be plenty, but one question I've got is whether anyone has squeezed a 3-into-4" y-pipe through a double-hump x-member... would be nice to take advantage of the 3" collector version of the SW headers.

ghettocruiser

iTrader: (4)

Hey man, Glad the info helped ya.

Im gonna say you COULD use the spohn x-member and build a decent y-pipe. However, that y-pipe is going to have to go around the x-member. And it gets tricky when you have to go under the subframe. So my recommendation is a double hump x-member, and a custom y-pipe. You can come straight back with it. Check out my other threads...I think the one is called "round 2..." or something. You can check out my y-pipe and all.

I didnt HAVE to modify my collectors on the headers. I installed v-band flanges on my entire exhaust system for ease of install/removal. But I could very well have just left the set up "slip on". In order to have room for the v-band clamps, I had to weld extensions onto my headers to bring the joint back and in alittle.

As for the 3 into 4 system... you could probably do it. If you built the x-member well, you could probably squeeze 3" y-pipes in. You have to pay more attention to your tolerances if you are doing that. Im running 2.5" collectors, 2.5" y-pipe into 3" catback. Flows plenty good for my set up, which breathes pretty heavy.

Someone else can chime in on the 3" y-pipe...

Good luck getting your swap going!

J.

cam-

One of the other swappers did a dual 3" y pipe and a 4" catback that was super clean. Its another white IROC and he was in the Michigan area IIRC. Looked pretty tucked to me he had an off site link with his entire build up about 20 pages or something crazy like that.