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400whp club here I come!!
HT MR2 Turbo
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3,546 Posts
If you are on the stock turbo... I don't know if it makes THAT much of a difference. If you plan on upgrading down the road.... it might be something you want to do while you are doing the exhaust. If you are going to do it... go 3".... may as well go big if your gonna go at all.
 

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91 MR2 Turbo
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197 Posts
jekyl, i know blitz and maybe a few other companies make an exhaust diffuser that replaces the stock downpipe outlet, is this helpful at all?
 

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91 MR2 Turbo
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197 Posts
i dont think that the blitz downpipe is an actual downpipe i think that it is just a difuser that bolts on to the bottom of the factory dp
 

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91 MR2 Turbo
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197 Posts
at least ive never seen it as a real downpipe, please correct me if im wrong
 

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I love Cin
91 Turbo MR2
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2,312 Posts
There is no "factory downpipe."
From the factory there is a turbo elbow and the primary cat.
Most companies that sell downpipes, sell a piece that replaces the turbo elbow and the primary cat.

Blitz sells a downpipe that bolts up to the factory elbow.
I would suspect the KO Racing DP Would flow a lot better because of this.

Tell Ken at KO that I sent you:)

Here is what the Blitz DP looks like:

 
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