Alright i'm looking at getting a set of headers for my l98 but I have a few concerns. The car has a 3in borla cat back now. and I was wanting to try and keep it 3 inch from the headers back. problem is I dont know if any company makes a 3in y pipe if possible. What would something like this cost me at a shop? an arm and a leg? oo. I'm also getting a new cat. witch was hoping to be a 3in 3 out

FYI: The following is a direct-fit, three-inch system: Hooker 2055's (Jeg's 520-2055). Catco high-flow converter (Summit CTO-9118). Hooker catback (Summit HOK-16823HKR).

JamesC

Hooker 2055's are 3 inch out... Get a high flow cat...
Most muffler shops use crush bends, not mandrel bends (as the hooker y pipe is)... It won't flow as good with crush bends...

Raf

well that was very fast. But I see that the 2055s are a.i.r compliant. The p.o removed the a.i.r system from the car. If it werent for that I would have my headers. does hooker make a header that can be used that isnt air?

Not sure if you can buy them with / without air, but it can be cut off and welded up... if you can afford it, go for ceramic coating... expensive, but keeps temps down and keeps them from rusting through too...

Raf

id get a down pipe made, for one they can run duals all the way to the cat or put dual cats and run duals right to the turn that goes along side the trans.....

or if you want to do away with the cats, just sometimes its hard finding a shop to do it, you can remove the tag and take the car on a trailer and say its just a show and track car its not registered, then they may do a no cat install

other times some palces just plain dont care, and will not put a cat on

either way its better to run duals as far as you can, most down pipes are like the stock one, the right side joins into the left pipe at the header, and not farther down stream, in other words you can run a exhaust like the H.O. dual cat setup

Sorry, 89,

I didn't understand that. Run it by me again.

JamesC

i edited it lol does it make more sence???

i CAN NOT type for some reason today

I just installed a set of Hedman shorties on my 86 IROC. The manager of the muffler shop that installed my flowmaster catback commented on the quality of the headers / y pipe and the exhaust.
He's been bending pipe for over 20 years and said it's the nicest he's seen.
Go with mandrel bent...
As for the pollution crap..I cut them off my headers, ground the weld off and removed the pipe from the primary pipes and had the shop mig weld the holes shut.

If you buy ceramic headers..they are going to grind the coating off so they can weld the holes shut..

Check some of the stickies in this section.

Hooker 2460 -> shorty, non emission config: no air or O2 bungs.
Hooker 2055 -> shorty, emission config.
(I think the collector fittings are different.)

I'm going w/ the 2460s, and had an O2 bung welded in, before
ceramic coating. Hooker is very proud of their matching y-pipe.
There is another thread in this forum that identifies a Doug's
y-pipe that is considerably cheaper and mates correctly w/ the
2460s. Summit part # DOU-D901.
Drawback is that the either y-pipe junction is a 2.5" outlet.
But it looks like you can cut off a small segment, and get it
opened up to 3" -- at least I hope so.