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      10-10-2011, 01:16 PM   #42
Cal@Sonic MS
 
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Drives: bmw
Join Date: Jan 2011
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Quote:
Originally Posted by ExclusivSTS View Post
You weren't joking...this system sounds remarkable!

You had mentioned pairing with Challenge? Whats advantage of that appose to full RPI system.

Thanks Cal!
If you pair the RPI GTM axle back unit with Challenge X-Pipes, you have multiple options depending on what setup you want to go with. (ie: retain OEM cats, utilize HFCs, catless w/ resonators, etc.) whereas the full RPI GTM race system is just catless with no resonators...
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