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      09-05-2012, 12:18 PM   #67
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Challenge F30 335 Dyno Results for our HFC Downpipe combined with our Sports Catback Exhaust. We finally had a chance to get our F30 335 on the dyno again Friday and saw some great results even with the stock ECU. The car put down peak TQ gains of 30 ft lbs. with a solid 20-25 ft lbs. gain across majority of the powerband. Horsepower gains were 20-23hp peak and between 12-20 hp gains across most of the powerband. This means great usable power and gains at every RPM.



Last edited by GTM_Challenge; 09-05-2012 at 12:40 PM.
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      09-05-2012, 11:27 PM   #68
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Awesome numbers!!!
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      09-06-2012, 02:50 PM   #69
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it sounds fantastic. love you guys for putting effort developing things for F30.

i hope drone is minimum at cruising speed.
is your shop car AT or manual?
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      09-06-2012, 03:08 PM   #70
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Quote:
Originally Posted by parky1215 View Post
it sounds fantastic. love you guys for putting effort developing things for F30.

i hope drone is minimum at cruising speed.
is your shop car AT or manual?
Thanks, Depends on the RPM but, there is very very minimal drone at highway cruising speeds with the downpipe. The car we have here is manual.

With the stock cat, there was no hint of drone at all.

Last edited by GTM_Challenge; 09-06-2012 at 03:34 PM.
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      09-06-2012, 03:59 PM   #71
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Adding the hfc downpipe to my order!
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      09-09-2012, 06:54 AM   #72
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That sounds sooo sick with the HFC!

GTM, will this work with the ix also?

Last edited by Ermagerd; 09-09-2012 at 06:59 AM.
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      09-10-2012, 11:59 AM   #73
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That sounds sooo sick with the HFC!

GTM, will this work with the ix also?
We have not yet got an ix 335 model here locally to test fit it, but hope to soon.
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      10-02-2012, 07:58 PM   #74
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any updates? can you take a picture of how the exhaust looks under the car?
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      10-09-2012, 10:34 AM   #75
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Quote:
Originally Posted by J-boogey View Post
any updates? can you take a picture of how the exhaust looks under the car?
Once we finish some production units we can share some photos of the design. Its full 3inch with no crush sections or tapers. We us a reinforced 3in flex section up front as well in the same location as stock.
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      10-10-2012, 08:50 PM   #76
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I love the sound of this exhaust!
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      10-29-2012, 06:51 AM   #77
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The exhaust sounds superb, plus I think it looks nicer than the M-Performance exhaust even though you won't ever see it except for the tips, hah.
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      11-06-2012, 09:17 AM   #78
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is the downpipe now avalaible with highflow cat? where can i order it?
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      11-06-2012, 10:54 AM   #79
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is the downpipe now avalaible with highflow cat? where can i order it?
We should have a better idea today or tomorrow as to when they will be available. It shouldn't be much longer.
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      11-06-2012, 11:17 AM   #80
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We should have a better idea today or tomorrow as to when they will be available. It shouldn't be much longer.
Any progress on the quad tip exhaust w/ diffuser?... I'd also like to hear a review on the interior sound/noise with the sport exhuast and DP w/ HFC.
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      11-06-2012, 02:24 PM   #81
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What type of cat is in the dp? 100 or 200 cell?
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      11-06-2012, 07:13 PM   #82
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What type of cat is in the dp? 100 or 200 cell?

It's a 200 cell.
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      11-06-2012, 07:14 PM   #83
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Originally Posted by mikew2069 View Post
Any progress on the quad tip exhaust w/ diffuser?... I'd also like to hear a review on the interior sound/noise with the sport exhuast and DP w/ HFC.
For the quad tip setup, expect it to be at least 2-3 months out. We have to finalize the dual tip exhaust and diffuser first.
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      11-08-2012, 07:31 AM   #84
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news???

i will this downpipe on my car!!!!!!
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      11-11-2012, 02:22 AM   #85
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Just curious if putting a exhaust + downpipe increases your chances of getting rolled / pulled over? Is there any sort of ticket you can get if you mod your car with both? Or if it becomes noticeably louder is that a offense?

Just curious, I am pretty sure eventually I am going to get some sort of aftermarket exhaust and possibly down pipe as well..What about warranty too?
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      11-12-2012, 06:00 AM   #86
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Depends on your local and state laws
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      11-12-2012, 11:39 AM   #87
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Originally Posted by RollingHard28 View Post
Just curious if putting a exhaust + downpipe increases your chances of getting rolled / pulled over? Is there any sort of ticket you can get if you mod your car with both? Or if it becomes noticeably louder is that a offense?

Just curious, I am pretty sure eventually I am going to get some sort of aftermarket exhaust and possibly down pipe as well..What about warranty too?
Quote:
Originally Posted by Zyklonic View Post
Depends on your local and state laws
The exhaust is very dependent of your local laws, law enforcement, etc. The downpipes by themselves would most likely not draw much attention from the authorities.

Some states allow modification of the stock catalytic converter system, others do not. We don't have any issues with our shop cars here in Chicago (knock on wood).

Last edited by GTM_Challenge; 11-12-2012 at 01:03 PM.
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      11-12-2012, 11:41 AM   #88
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What kind of noise can I expect inside the car with the HFC DP and sport exhaust? I really want to wait for rear diffuser/quad outlet but I'm impatient so who knows.
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