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BMW 3-Series (E90 E92) Forum
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Catted Riss Racing DP
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10-23-2017, 03:24 PM | #1 |
Second Lieutenant
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Catted Riss Racing DP
Catted downpipes will still create tons of power. Riss Racing cats are located near the bottom of the downpipes. They have custom Metal Substrate Catalytic converters which flow from 3" to 2.5" smoothly. The reason for this is to continue to build boost up top with 3 inches of flow and putting the cats in before the sensors so we don't have a CEL. Downpipes fit 335i and 135i. |
10-23-2017, 08:15 PM | #2 |
Major
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600 you outta your mind lol, this aren't og ar design down pipes
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