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      11-06-2012, 01:41 PM   #1
shivaswrath
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Question Does the CPE DP fit F30's?

Just wondering...
http://burgertuning.com/CPE_N55_BMW_..._downpipe.html

My limited experience in the Evo world, bigger DP increases gas velocity early in the exhaust cascade, so quicker spool is a plus, and leads to across the RPM gains...was wondering thoughts.

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      11-06-2012, 02:06 PM   #2
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No it does not fit the F30

But there are others that do and more in development
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      11-06-2012, 02:08 PM   #3
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Here's a catted one
http://www.f30post.com/forums/showth...=659670&page=3

and a cat-less one
http://www.**********s.com/Evolution...W-F30-335i.htm
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      11-06-2012, 03:34 PM   #4
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Quote:
Originally Posted by utenigma View Post
my god those look horrible (the racewerks one) - I guess I'll wait for a more mature product development cycle to hit the streets.
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      11-06-2012, 06:33 PM   #5
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Quote:
Originally Posted by shivaswrath View Post
my god those look horrible (the racewerks one) - I guess I'll wait for a more mature product development cycle to hit the streets.
The raceworks picture is their prototype - after welding before polishing
Doesn't matter as you'd really want to get it ceramic coated to push all that heat out of the engine bay anyway
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      11-06-2012, 08:27 PM   #6
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5" is way to big and not needed at all. I would like to see a 3.5" max, i can have my friend make me one and it will be nicer then those but i dont feel like having the car down for a week or so.
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      11-11-2012, 02:46 PM   #7
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Can someone please explain the difference between a "catted" and "catless" DP?
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      11-11-2012, 03:09 PM   #8
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Quote:
Originally Posted by RollingHard28 View Post
Can someone please explain the difference between a "catted" and "catless" DP?
Catless lacks a catalytic converter.

Catted has one.

Unsure if the catless is legal in CT...usually without a CAT it isn't, but there's usually a secondary cat downstream that's "lit", and covers you for emission tests. I used a singular 200-cat and passed emissions for years with my Evo VIII.
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