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Discussion Starter #1
Hey guys, i just had a quick question. I am looking to buy a catted dp. Say i already have a Greddy ti-c exhaust and AP. what is the best catted dp u can recomend for an 07 wrx
 

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cobb has a catted downpipe, so does helix.
 

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Discussion Starter #6
changing the DP allows for a bigger diameter which inturn means more flow. plus, i dont beliv that the stock cat is high flow
 

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Seriously....isnt the "hi-flo" cat a cat in name only since i heard that it doesnt do anything. If it works whats the point of changing out your DP if your going to keep the cat?
A high flow cat will cut down on SOME emissions but it's mainly the smell that people go after. Also your rear bumper wont blacken as bad.

It's well with it IMHO to get a quality dp with a cat for the average street stage 2 setup.
 

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which up pipe would u recomend? is an up pipe even worth the $$$
nah...the 07's have pretty good uppipes.....put that money into something else
 

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Cobb, Invidia, and TurboXS Stealthback - they're the big names ;)

Since you already have a CBE, I'd recommend Cobb/Invidia (depending on the diameter of the CBE you have)
 

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How about the Helix? I don't see much mentioned on how it is for a catted DP. Also, any drawbacks/advantages on a divorced wastegate dp versus bellmouth for bigger turbo?
 
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