I have a set of hooker competition headers waiting to go on my 91 RS but I'm not sure about what all I'll need to get them on right. The headers don't have the AIR hookups so I'm not sure if I should get them welded on or just bypass it all together. I want my car to still be legal and pass emissions but if I don't need the AIR for that it'll save me time and money. I also need to find a Y pipe that'll bolt right up to these. Thanks.

 

you could get by the sniffer without air tubes, but your not going to be able to pass a visual inspection without them. and it would so much easier to have them welded on while they are outside of the car.

should be pretty simple, just dirll the holes for them (not sure what size) then have someone who welds, weld them on.

as for the rest of the install. all you need is header gaskets (where the flange meets the cylinder head)

a couple of collector gaskets, and the header bolts.

 

Unless you got these headers for free or something like that, you'd be better off returning those and getting some already made for A.I.R.

 

And there is no y-pipe that bolts up to the 2460 hooker competition headers.

 

I did get these headers for free. They came with my car so why not put them to use. The biggest problem I really have is the Y pipe. I really need to find one that'll bolt up so if anyone knows of one it'll save me a lot of time and money being as I don't weld.

 

Sometimes free is more expensive than paying for what works right out of the box.

The headers "came with the car", so can we assume the previous owner couldn't figure out how to do it, either?

As stated, there is no pre-fabricated y-pipe that will bolt up to those headers. A competent exhaust shop could modify your existing y-pipe to attach it to your headers. The main problem with that is you'd be retaining the restriction that's built in to the factory exhaust system. Although the headers will help some, it won't be much. Plus, that type of work is typically more expensive than the headers themselves - expect to pay in the $150 range minimum.

The proper way to "fix" an RS exhaust is to rip it all out and replace it with TPI-style parts for '86-'90 single-cat application. The Hooker 2055's fit that description as does the Catco 9118. Then you'll need a cat-back. Last I checked, all that will run you about $750, but you would be able to bolt it all in yourself, and you'll have a system that will support not only your current engine, but any future upgrades you might consider, and be completely emissions-legal. Sell those 2460's for the ~$125 they're worth (assuming they still have the gaskets, bolts, and adapters a new $145 set would have) to help off-set the cost.

Any other path would be an exercise in futility. Sorry, but that's the harsh reality.