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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 > I want a little more loud... Add HFC?



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      02-18-2013, 11:47 PM   #1
e92ben
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I want a little more loud... Add HFC?

Hey guys just wanted some help.

I have RR catless DP and dinan exhaust. I love it but want it a tad more aggressive.

I was wondering about adding high flow cats to replace my secondary cats.

I would cut them off but i do NOT want the smell.

Anyone know if high flow cats would add a positive change to the exhaust note? Thanks.
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      02-19-2013, 12:07 AM   #2
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I would think it would increase but not enough to make it worth the money, after a week you wouldn't even remember that it sounded different.

IMO removing them would definitely give you the sound you are looking for
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      02-19-2013, 08:56 AM   #3
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Quote:
Originally Posted by Marcadelic
I would think it would increase but not enough to make it worth the money, after a week you wouldn't even remember that it sounded different.

IMO removing them would definitely give you the sound you are looking for
Thanks for the reply. Everyone says horror stories about smells being fully catless?
I got 2 nephews that ride in the car at least once a week I don't want it to bother them nor me
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      02-19-2013, 12:57 PM   #4
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Quote:
Originally Posted by e92ben View Post
Thanks for the reply. Everyone says horror stories about smells being fully catless?
I got 2 nephews that ride in the car at least once a week I don't want it to bother them nor me
i think it will be hardly noticeable, but if you really don't want to delete them then i would say go ahead and try the high flow cats, worst case you can always sell the dinan ones and buy the new VRSF version that's coming out and still have money left over
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