the z28 and the iroc came with a y-pipe correct me if im wrong. now i want it to be a straight pipe or run with a mid pipe. basically i dont want the y-pipe. can any one fill me in on what to do.

 

I'm somewhat confused (normal state of affairs). If you have no Y pipe, there's nothing to bolt to the exhaust manifolds.

The two pipes bolt to the manifolds and are routed downward where they join into a Y. The cat bolts/slips on, then there's the cat back.

JamesC

 

yes but lets see, i want two straight pipes from headers to tail pipe example like a mustangs exhaust. im not sure if you know what i mean but thats the best i can explain it

 

2 straight pipes all the way out the back of the car from the manifolds/headers is a TRUE 'dual exhaust'. Not impossible to do on our cars, but not the easiest either AND plenty of go-fast cars on this board run a single exhaust out the back roughly the size of a sewer pipe

 

I finally understand. I'm sure a shop can fab what you need, though the cost may be prohibitive.

JamesC

 

that actually sounds really cool. so what are you telling me that mabe i should just stick with y-pipe and if so what is the biggest the pipe can go from header to tail 3, 2.5in

 

2" outlet manifolds with single 2 1/4" y-pipe
82-87 305 LG4 (VIN H)
88-92 305 L03 (VIN E)
82-83 305 Crossfire
90-92 305 LB9 w/o G92 axle (VIN F)

2 1/4" outlet manifolds with single 3" y-pipe
83-86 305 L69 (VIN G)
85-89 305 LB9 (VIN F)
88 350 L98 (VIN 8)
89 350 L98 w/o G92 axle (VIN 8)

2 1/4" outlet manifolds with dual 2 1/4" cats
89 350 L98 w/G92 axle (VIN 8)
90-92 350 L98 (VIN 8)
89 305 LB9 w/G92 Axle (VIN F)
90-92 305 LB9 w/G92 (Vin F)

JamesC

 

what about after market

 

To my knowledge, there is no performance Y pipe sold that will bolt to an OE exhaust manifold. With a set of headers, such as the Hooker 2055's or Dyno Don's, yes. The Hookers are 3". The following would provide a 3-system:

Hooker 2055's (Jeg's 520-2055). Catco high-flow converter (Summit CTO-9118). Hooker catback (Summit HOK-16823HKR).

JamesC

 

hm im not to sure. i think i still want to go with a true dual setup i just need to find out how ha.

 

Check the stick at the top of the page for some ideas. Good luck.

JamesC

 

I stumbled on the following link, which I thought might interest you:

https://www.thirdgen.org/forums/exha...ms-solved.html

JamesC

 

james you are a big help thanks lol no really like that does make it easyier you have no idea now its time to do my reserch.

 

I may be heading to a slavage yard in a couple weeks, and i was wondering; does the 2 1/4 outlet manifold-3" y-pipe require the 2 1/4 manifolds, or can they bolt up fairly well with little fabrication to the 2" outlet manifolds. I need a new exhaust, and I figure, if I have to swap the manifolds, it's not worth it, but if it's easy enough to bolt on, upgrading to a 3" pipe now wold save me some money in the long run. Anybody know if they do just bolt up? Thanks a lot!

 

Yes.

JamesC