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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > NA Engine (non-turbo) / Drivetrain / Exhaust Modifications > HFC High Flow Cats



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      07-23-2012, 09:38 PM   #1
jkrew
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HFC High Flow Cats

Does anybody make a bolt-on HFC for an E9x NA engine??

I understand weld-on universal HFC's are always an option... but would much prefer bolt-on.

In the past, I always felt HFC's were the best power/$$ mod.

Magnaflow lists direct fit catalytic converters - but they appear to be just a stock replacement.

Note: Just switched over from Audi last weekend and picked up an '07 328i - really looking forward to tinkering with this thing!!!
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      07-24-2012, 12:33 AM   #2
flinchy
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Quote:
Originally Posted by jkrew
Does anybody make a bolt-on HFC for an E9x NA engine??

I understand weld-on universal HFC's are always an option... but would much prefer bolt-on.

In the past, I always felt HFC's were the best power/$$ mod.

Magnaflow lists direct fit catalytic converters - but they appear to be just a stock replacement.

Note: Just switched over from Audi last weekend and picked up an '07 328i - really looking forward to tinkering with this thing!!!
High flow cats won't do jack if the id of the pipes either side is still smaller/stock
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      07-24-2012, 09:27 AM   #3
jkrew
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Quote:
Originally Posted by flinchy View Post
High flow cats won't do jack if the id of the pipes either side is still smaller/stock
Agreed. Plan on doing headers/exhaust as well.
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