My car has the single cat, is it easy to convert to dual? any extra heatshields needed or problem with the rest of my exhaust?

 

why would u want dual cats? just go with a good hi flo cat and then it should work well

 

IIRC, the dual cat set-up only made 10hp over stock. For the money involved, you might simply consider a high-flow cat and catback.

JamesC

 

To answer your question it is no hard to do. Dyno Don does it all the time at his shop. The more mods you have the more horsepower will get from the mod.

 

So, if I stay with one cat, whats the best one to use? What have people had the best luck with??

 

magnaflow highflow cat

 

Catco is another possibility.

JamesC

 

Its rated at 10 HP over stock, but that doesnt mean that's what it really is. Which would you rather have, 4 pipes flowing thru 2.5", or 8 pipes flowing thru 3"? Doing the math, two 2.5" has more area than one 3", right? The hardest part about doing the dual-cat conversion is finding the dual-cat AIR pipe, as its discontinued. The other part is the cost. You need to pay a muffler shop to fabricate you a 2.5" mandrel bent y-pipe to go with your 2.5" cats. I second the Magnaflow recommendation.

 

Here is how I do them:
(with Magnaflow)

 

So what is the real hp gain, 15 or 20? And what would the 3-incher gain? I guess, for me, the real question is cost vs. performance between the the two. I have doubts that the difference would be significant enough to merit the expense--for me personally, at any rate. I'm sure there are others who want every every bit of hp they can muster and who are willing to pay for it. Good for them.

JamesC

 

thats just added wieght

 

seems like if u do that you might as well run true duals.

 

I removed my dual cats and put on a random tech single with a slp 3in cat back and definately didnt lose anything performance wise I might have gained but havent g teched it yet for what thats worth.