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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Powertrain and Drivetrain Discussions > N54 Turbo Engine / Drivetrain / Exhaust Modifications - 335i > secondary



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      07-23-2011, 01:24 PM   #1
upss
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secondary

if i deleted the secondary catted with the original down pipe make sense to gain a few horsepower with more flow thank
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      07-23-2011, 01:40 PM   #2
Jeff@TopGearSolutions
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It wont produce any seat of the pants power but every little bit helps in the quest for more power.
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      07-23-2011, 01:49 PM   #3
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Anything you can do to free up the exhaust, will create power.
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      07-23-2011, 02:18 PM   #4
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Very little power, mostly sound.
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      07-23-2011, 03:54 PM   #5
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What kind of sound difference will it make? I've got a magnaflow axel back and I'm looking for a little more volume, will removing the secondary cats add volume or just change the tone?
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