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Old 08-20-2010, 06:00 PM   #6
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Join Date: Dec 2005
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Location: Northbrook, IL
2005 2.5RS 4EAT
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Originally Posted by hellajdm View Post
uhhhh... what?
What I meant by that was.

The max CFM allowed by the stock cat is more than enough for an engine with stock cams and internals.

The major restriction is in the cylinder head, not anywhere. An intake can free up "some" power, but it's definitely not even close enough to having enough flow to justify getting a high flow cat.
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