ORY or duals need help!

**unibuga** · 12-17-2011, 06:20 AM

so ive got these edelbrock longtubes coming in the next few days but i still need a Y pipe the problem is the headers have 3.5" collectors and i dont want to use reducers if i dont have too so does anyone know where i can get a 3.5" ORY? or i would also do and x pipe if it wouldnt cost too much

also for the install do i just put the front o2 back in and call it good or is there other things i need to do? and im gettin it tuned after its all done

**Firebirdjones** · 12-17-2011, 06:41 AM

Your best bet is to give Mufflex a call. They make large diameter Y's that work with their 3 1/2" and 4" diameter cat back systems. I just don't remember how big the Y-pipes are though.

Largest I've seen from other manufactures are 3". If nothing else, it sounds like you might be custom fabbing something. Going to be tricky with not much room to work with on the 4th gens.

**unibuga** · 12-17-2011, 06:49 AM

yeah i thought about tryin muffex!
and i also think i could do a custom one pretty easy with a lift and some exhaust tubing

**Firebirdjones** · 12-17-2011, 06:59 AM

Fabbing exhaust isn't bad. If you have a welder, along with something to make straight cuts with, and buy a supply of mandrel bent tubing. From there it's just a little of your time to make something.

**unibuga** · 12-17-2011, 07:00 AM

thats what i was thinking i have pretty good welding and some sheet metal skills lol

**KMdef9** · 12-17-2011, 07:48 AM

You could also have cutouts right after the collectors then reduce down to 3" for the y. You would have to shorten the y the length of the cutout, but that shouldn't be too bad.

**unibuga** · 12-17-2011, 07:52 AM

not a bad idea and then i could still benifit fromt he bigger collectors......has anyone one heard anything in the super victor longtubes? i got them on sale coated for 230

**ls1camino** · 12-19-2011, 04:13 AM

I have the Kooks 2" headers with the 3.5" collectors. I had a mandrel bending shop here in MD fabricate me a 3.5" y-pipe to match to my 4" Mufflex exhaust.

**kingls1** · 12-19-2011, 06:37 AM

Originally Posted by KMdef9

You could also have cutouts right after the collectors then reduce down to 3" for the y. You would have to shorten the y the length of the cutout, but that shouldn't be too bad.

Why would you reduce it from 3.5" to 3" the Idea is to use same or increase the size through the whole system, any time you choke down you lose flow. Stacy David (Gears-speed) recomends 250-350hp 2.5" single -2.5" duals, 350-450hp+ 3.0" single - 2.5" duals - 550hp+ 4.0" single- 3.0" duals. To much bad to little also bad.

**jsmith564`** · 12-21-2011, 04:27 PM

for street anything over 3in imo is over kill..

**unibuga** · 12-21-2011, 04:38 PM

Well it is for street but I want to own the street! Lol

**Firebirdjones** · 12-21-2011, 04:49 PM

3" isn't overkill for anything if the engine requires it. Especially when it comes to these single systems on these 4th gens. Frankly, a 3" single pipe isn't enough for even mild 400 hp applications.

**KMdef9** · 12-21-2011, 10:49 PM

Originally Posted by kingls1:2729563

Originally Posted by KMdef9

You could also have cutouts right after the collectors then reduce down to 3" for the y. You would have to shorten the y the length of the cutout, but that shouldn't be too bad.

Why would you reduce it from 3.5" to 3" the Idea is to use same or increase the size through the whole system, any time you choke down you lose flow. Stacy David (Gears-speed) recomends 250-350hp 2.5" single -2.5" duals, 350-450hp+ 3.0" single - 2.5" duals - 550hp+ 4.0" single- 3.0" duals. To much bad to little also bad.

Because you would have the cutout at 3.5". And you would obviously be tuned for the cutout exhaust flow, which would make whatever you have after the cutout irrelevant.