ok, I want to upgrade my 91 rs' exhaust with somthing better than stock. Here's the trick. I don't want to have to mess with it a lot. I want to bolt em in, and put a high flow cat on. I have the single cat exhaust going through 2 3/4 inch pipe to a flowmaster muffler, with dual tailpipes. What is the best aftermarket cat, and what is the best bolt in exhaust from the cat forward? oh, I have a 350 that the desktop dyno predicts will put out between 260 and 310 horsepower. or are my stock manifolds fine for such a wimpy 350?

 

SLP has Y pipes if you want to keep it simple. $165. That way you can keep the stock manifolds.

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-Tas
'89 Formula WS.6
Mods and times:
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[This message has been edited by Tas (edited October 11, 2001).]

 

it's not that I want to keep the stock manifolds, but if there was somthing that was better, that would bolt in, I'd be all over it.

 

All the headers bolt in but they go to 3" cats. I dunno how off it will be with the 2.75" pipe you have going to your muffler.
I got hooker headers. If you don't need them to be certfied 50 state legal then there is a cheap set for like $150. But you ask what is the "best". The Best is SLP. Cheapest I've sen them are $375 at group purchase price. That is still without the install kit though.

------------------
-Tas
'89 Formula WS.6
Mods and times:
TOP SECRET

Got Beach?