So the time has come to replace the garbage tri-y headers and y-pipe that came on my car when I bought it from the last owner. They are leaking around the passenger side flange and I am getting exhaust fumes in my car (probably leaking elsewhere as well). Nearly every post about header installs I have read has warned to do it right the first time to save a lot of grief. I've decided to go with the Hooker 2055's, Fel-Pro gaskets, Stage 8 locking header bolts, and a MagnaFlow 3" Cat. Going to order from Summit because they have always given me good service. Now for the questions. I plan on keeping the AIR system intact, so it looks like I need the part # HOK-2055HKR Hookers. The MagnaFlow cat I am looking at is part # MPE-93441 (Slip fit inlet, stock flange outlet). Will this cat mate to the y-pipe that comes with the hookers without modification? As for the Fel-Pro gaskets, which exhaust port opening do I need to match the headers/heads? There are the stock port (part # FPP-1444) as well as oval, square, round, and D-port. Which should I use? Should I also order a better gasket for the collector to y-pipe connection? If so, what is the part # for those gaskets? OK last ?. The Stage 8's seem like the way to go to prevent leaks down the road. Which ones should I order to fit the setup I plan on running? Any input would be a great help. I don't want to dive into this install only to find out in my garage that I have mismatched parts. Thanks in advance! This site is the best.

 

The cat is direct fit for the same application as the 2055's, so yes, it'll fit the y-pipe.

Gaskets should work, too.

 

So I want the stock port gaskets for the best match, or should I go with one of the others (D-port, oval, etc.)? Still wondering about the locking bolts if someone can point me in the right direction about that. It seems there are 2 lengths for the bolts 1" or 3/4"? Thanks for the input so far.