When putting in headers, many companies see a Y pipe the meets at some sort of X pipe.

How restrictive is this system? Does it make allot of sense to run headers into a common pipe then out to dual? How much of a disadvantage is this over true dual?

Thanks!

 

I normally run a crossover pipe (on the old school musclecars)around 12-18 inches behind the collector, space permitting. Lots of guys like the X pipe. Only thing that makes me skeptical of them is the turbulence created in the X by two separate paths of exhaust colliding in a small area, then being forced out to whichever pipe. With a crossover, the exhaust continues a straight path, but gets the "pulse relief" you read so much about. I do like the sounds of cars with the X pipe though. On my vette, I just went the 2.5 into 3" back into 2.5" Y. Its not a high horse application, and is probably sufficient.

 

The way I figure it, the X-pipe is a killer piece of equipment... NASCAR uses them to get the most power possible. I may not be a big fan, but those dudes know engines...

 

So I wouldn't be giving anything up to go from headers to a Y pipe to an X pipe. Seems contridictory to common sense, but OK.

Thanks, now all I need is money.

 

I don't see where a Y-pipe fits in with an X-pipe. You have two header collectors, why not bring them directly to an X-pipe? Then obviously out of the X-pipe you have two outputs to take to the rear as duals.

The L98s stock had a Y-pipe to bring the exhaust to a single cat. I don't see any reason to use a Y-pipe on an aftermarket custom exhaust, or to continue to use a Y-pipe on a car with headers.

I have cats on mine so I am politically correct and environmentally sensitive. Still my headers, X-pipe, and duals behind gave me a huge torque boost. And it sounds great to boot.

Look at this for visual reference.

 

PERFECT!! THAT IS EXACTLY WHAT I NEEDED!

Thank you.

How's that exhaust working for you? Do you like it? What kind of headers. Hope you don't mind, I downloaded the picture to bring to the exhaust shop.

Did you have to get heated 02 sensors?

what year, trans, motor is that?"

I have a 1990, L-98, auto

 

FELNGR8-Clean install!

 

What specific distinction are you drawing between an X pipe and a crossover? Are you referring to an H pipe as a crossover?

Sorry if I sound stupid, I'm from the old C3 school where we do straight dual. I'm still trying to learn this newer technolgoy.

 

How's that exhaust working for you? Do you like it? What kind of headers. Hope you don't mind, I downloaded the picture to bring to the exhaust shop.

The exhaust gives me a big torque boost beginning at about 3100 and doesn't tail off til over 5000. That's a kick you can feel in the butt-o-meter. It sounds more like a fat fender rod than a Corvette, which leaves a lot of people doing a double take as I drive by. It's made with 3 inch Dynomax bullet glass packs, 2 per side.

Those are TPIS headers. The installation was very clean on my LT1, and I reused the EGR pipe so it looks totally emissions legal. With the Hot Cam having internal egr through overlap that probably is nothing but looks.

Did you have to get heated 02 sensors?

My car is a 94 so I started with heated O2s. I bought a pair to reinstall when I did the work. I did need the O2 extension cables that TPIS included.

what year, trans, motor is that?"

This is a 94 6 speed LT1. Which makes a difference in where the cats can be located. With the auto your exhaust shop will have to put the cats in the tunnel behind the transmission and before the X-pipe.

The L98s were using 2-way catalysts, that's why they have precats and a single large cat after the y-pipe joins. After market high flow cats are 3 way catalysts so one in each pipe is sufficient.


I have a 1990, L-98, auto

You do have to fit all this around the transmission, and I have a smaller starter motor than some L98s. I'm not sure what you have on the 90.

I would call TPIS directly and not try to buy from their web site. They will fix you up with what works right for your car.

 

Yes, I was referring to the crossover as an H-Pipe

 

JSup,
I have an 87 with the L98, although you have a factory smaller starter than I do. When I get home today, I'll put my car up on ramps and take some photo's for you today. I have the Hooker Super Comp's with a custom designed Flowmaster Header-Back exhaust. It consists of 2 Flowmaster Y Collectors, that were cut shorter and had a Dynomax Race bullet put between. So it's basically an X pipe, with a resonator in the center. Really makes a unique exhaust tone, and IMHO flows 100x better than any pre-fab cat-back.
Not to mention, my header-back cost me $300, parts/labor. Although, if I had it to do over, I'd use all Stainless Steel piping, simply for the bling factor.

 

It's quite different then what we're dealing with though, but yes they do cross the two pipes together

http://static.howstuffworks.com/gif/muffler-nascar.jpg

 

Thanks. I have a Power Effects cat back that I really like, and hope to keep. It's practicaly brand new. I am trying to figure out how to get to them from headers. I'm trying to determine if an X pipe is the way to go. It would be easier than trying to configure a complete dual system.

I think the Y pipe will go right to the cat, but I would perfer an X pipe with two cats.

How'd the Hookers bolt up? Any problems with wires on the exhuast, or any other fit problems?

 

Wow! Thanks FELNGR8, now I'm rethinking my whole exhaust system! Very nice, maybe I should go longtubes while I'm at it?? I was going to go with stock manifolds, Random Tech hi flow cats, x pipe instead of resonator, and back to Magnaflow muffs w/ stock LT1 tips!

I gotta look into TPI headers, and what about Kook's?/ I know they do C5 stuff, but maybe they have C4 headers too! Nice!!!!

I know a shop by me that does UNBELIEVABLE work on exhaust systems,(Doug's Street Custom, Fairlawn, NJ) should be a breeze for him to install!

PS i have a 'vert though, will longtubes be too low, or am i thinking out my azz?? Can't be lower than x brace, right?

jsup, whats up????!!!!