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      10-03-2012, 12:48 PM   #1
1MOREMOD
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any clip of hfc plus OEM exhaust mod

i have the challenge sport and would like it to be a little louder. anyone have both a primary cat delete and oem exhuast mod clip i can hear to help me decide. any draw back here. right now i notice a little tinny sound at certain rpms.
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      10-03-2012, 01:08 PM   #2
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I will try and get some clips for you when I meet my friend this weekend. It sounds phenomenal, although the videos may not do it justice.
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      10-05-2012, 06:48 PM   #3
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I don't have catless primaries but HFC primary, deleted secondaries/quad resonated x-pipe with the OEM exhaust mod. I can post a vid of that if you like. I also have a sound clip from when i dyno'd the car. I had to add another set of resonators to the x-pipe because I thought it sounded way to high pitched & raspy. I love the exhaust note now though.
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      10-05-2012, 07:20 PM   #4
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sure lets hear it.
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      10-06-2012, 07:55 AM   #5
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I have primary cats deleted + oem mod. Very bright and loud with widows open.
Listen here:


Last edited by raywong; 10-07-2012 at 07:40 AM.
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      10-07-2012, 07:42 AM   #6
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one more:

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      10-08-2012, 02:10 PM   #7
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sounds good i may need to do this in the off season this winter along with my camber plates.
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      10-08-2012, 06:05 PM   #8
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Those vids sound similar to mine with oem mod and secondary cat delete. Maybe a little louder and more raspy though.
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      10-08-2012, 08:29 PM   #9
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I have heard this set up in person...sounds awesome but is LOUD!
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      10-09-2012, 01:20 AM   #10
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It is a lot louder than stock, took me some time to get used to. The only bad thing about this mod is, it is either very quiet or very loud, no in between. Sometimes I don't like to attract too much attention driving this car, but whenever I tried to pass anyone at any speed, my car screams out "look at me I modded my bmw get the fxxk out of my way". It is embarrassing! A lot of dirty look from other road users. It is different when driving a loud Ferrari, it is expected to be loud, people smile instead of dirty look. If I could start all over again, I would replace the smaller perforated sections instead of the larger one, and I wouldn't over stuff the absorption chamber with extra fibre. That way you get no drone, bright tone, and scream only at higher rpm.
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