AA HFC hangs low?

warp10 · 07-31-2012, 05:18 PM

Hey guys,

I installed my Active Autowerke HFC Xpipe and I have noticed that the clamp the holds the HFC's to the x pipe hangs below the the car. I will post pics...I am on my iPhone.

newmedicines · 07-31-2012, 08:08 PM

Sorry if its unrelated but what exhaust did you put your hfc with? Did it throw any cel?

warp10 · 07-31-2012, 08:29 PM

I paired it with a UUC cat back here is a video Honestly not sure because it went a head and but in the delete-r. But from other members these will throw a CEL

warp10 · 07-31-2012, 10:00 PM

The clamps that hold the hfc are right up against the heat shield and vibrates under a heavy acceleration. It is just causing some ground clearance issues. Any one else have this issue?

Jbook · 07-31-2012, 11:07 PM

I know what you mean... my AA HFC are easily the lowest part under my car and sometimes scrape on really big speed bumps or if I go up a short steep driveway. As far as the vibration is concerned, just bend the heat shield back and it will fix your problem

warp10 · 07-31-2012, 11:56 PM

Read my post in another thread about what to do to get rid of vibration. You need to bend the heat shield in several places and i listed all the ones to check. You are likely hitting the black "brace" as well and would be better served by removing it and replacing the bolts back on the frame without the black thing. It WILL fit well with no vibration after all this is done.

What pisses me off is why a big company like AA cannot make a factory fitting exhaust pipe. I mean they don't even put all the same hanger points on the thing as they leave out one of them near the high flow cat area. Just not that hard to make something fit like factory. THe thing is its not even the high flow cats that are a bad fit, even though those are the only thing I could understand being hard to fit due to the size. Oh well. worth it for the sound IMO. I love the sound[/quote]

Can you post the link to your thread you mentioned. Also I agree that the sound is worth it!'

persian54 · 08-01-2012, 12:04 AM

I used to have an AA HFC Xpipe

I did like the sound (it was a bit raspy and raw, as I had it hooked up with an OEM rear), but it bothered me that it would sometimes scrape when I went over steep bumps and driveways. it's simply a design flaw

pbonsalb · 08-01-2012, 05:32 AM

V Band clamps do require an extra 3/4 inch on top and on bottom (and on the sides) and this reduces clearance. But they make it easy to install and remove a section of exhaust and they usually don't leak. You can remove it and weld the HFC section in place. You can cut it out and use a 3 inch wide band clamp that fits flush everywhere except the joint (and you can locate that on the side).

s65power · 08-01-2012, 11:38 AM

I had this problem with the Fabspeed setup on the left side. It would hit over speed bumps. I wound up selling that exhaust and never got that resolved.

Some cats have trouble fitting and you have to pound the heat shield to make enough room. I don't have experience with the AA one but it sounds good!

dapopa9 · 08-01-2012, 05:13 PM

Yes it hangs a bit lower than the stock setup. Make sure the heatshield is not touching the pipes...that is most likely what is causing your vibration.

M3PO · 08-01-2012, 05:22 PM

Quote:

Originally Posted by s65power

I had this problem with the Fabspeed setup on the left side. It would hit over speed bumps. I wound up selling that exhaust and never got that resolved.

Some cats have trouble fitting and you have to pound the heat shield to make enough room. I don't have experience with the AA one but it sounds good!

Left as in driver's side? That's strange because you can rotate the driver's side up a bit. On the passenger side, you can't because the flange is welded to the header.

My Fabspeed cats hang low. One has a big dent. This car doesn't work well with round HFC it seems.

SalDoyley · 08-01-2012, 07:55 PM

Nothing you can really do-I tried a bunch to get this up higher

C|3R1C · 08-01-2012, 08:09 PM

I'm trying a way next week to raise the pipe a little (the catback at least) ill let you know how it works.

GIdriver · 08-01-2012, 08:11 PM

Quote:

Originally Posted by warp10motorsports

Hey guys,

I installed my Active Autowerke HFC Xpipe and I have noticed that the clamp the holds the HFC's to the x pipe hangs below the the car. I will post pics...I am on my iPhone.

Hmm... That seems pretty low...

GIdriver · 08-02-2012, 08:28 AM

Quote:

Originally Posted by m3alabama

Do you even have this xpipe? His exhaust is hanging low like everyone's and this is normal for the AA. Why comment when you don't even have this setup!! or never did have it!

Hold it right there, mister. When I saw the picture I was truly amazed of how low the x-pipe hangs. I recently installed the Akra Evo and fits PERFECTLY. If you are implying that I wanted to worry the OP, you are plain wrong! By the time I made the comment it was obvious to the OP that this is usual for the AA x-pipe. If I gave the wrong impression, my apologies to the OP, not to you though. So don't come out swinging with no reason. Last but not least, this is an internet forum, people can make comments.

aus · 08-02-2012, 10:41 AM

Wonder why this hasn't been brought up in the past?

.

Zzhou · 08-02-2012, 03:25 PM

my AA catless x-pipe has kinda same issue with the clamp, i just bend the heat shield and that will help. but still has vibration. I paired with AA exhaust.

edwinm3 · 08-03-2012, 06:37 AM

I don't know what's wrong, maybe it needs some adjustment. Mine is perfectly leveled and no scraping or vibration/rattling

bigjae1976 · 08-03-2012, 08:50 AM

Just hammer and bend it into an oval.

warp10 · 08-06-2012, 09:15 PM

Quote:

Originally Posted by bigjae1976

Just hammer and bend it into an oval.

bend what into an oval??

VCMpower · 08-11-2012, 11:50 PM

It's unfortunate, but they are so effective at the task.

330iTiAg · 08-12-2012, 01:01 AM

Couldn't a muffler shop weld on the missing OEM hanger position(s)?

07-31-2012, 05:18 PM	#1
warp10 Lieutenant Drives: 2011 M3 Jet Black:ZCP, ZCV, ZP Join Date: May 2011 Location: Atlanta, Ga Posts: 418 iTrader: (0) Garage List 2011 M3 [5.00] 2011 28i X3 [0.00]	AA HFC hangs low? Hey guys, I installed my Active Autowerke HFC Xpipe and I have noticed that the clamp the holds the HFC's to the x pipe hangs below the the car. I will post pics...I am on my iPhone. Attached Images Last edited by warp10; 07-31-2012 at 06:53 PM.
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07-31-2012, 08:29 PM	#3
warp10 Lieutenant Drives: 2011 M3 Jet Black:ZCP, ZCV, ZP Join Date: May 2011 Location: Atlanta, Ga Posts: 418 iTrader: (0) Garage List 2011 M3 [5.00] 2011 28i X3 [0.00]	I paired it with a UUC cat back here is a video Honestly not sure because it went a head and but in the delete-r. But from other members these will throw a CEL Last edited by warp10; 07-31-2012 at 08:44 PM.

07-31-2012, 11:07 PM	#5
Jbook Captain Drives: '11 ESS E90 M3 Join Date: Sep 2010 Location: San Jose - Bay Area Posts: 784 iTrader: (15) Garage List 2011 BMW E90 M3 [5.00]	I know what you mean... my AA HFC are easily the lowest part under my car and sometimes scrape on really big speed bumps or if I go up a short steep driveway. As far as the vibration is concerned, just bend the heat shield back and it will fix your problem __________________ ESS VT2-625 w/ Stack Gauges \| Dinan Stg 2 Suspension, CF Strut Braces, & Pedals \| Akrapovic Exhaust \| Active Autowerke X-Pipe w/ HFC \| Vorsteiner VS-400 Wheels, CF Lip, CF Type II Diffuser, & White Piped Floormats \| BMW Performance CF Spoiler, CF Mirror Covers w/ M5 paint scheme, & Performance Steering Wheel w/ Custom White Stripe \| Apex Arc-8 track wheels

08-01-2012, 12:04 AM	#7
persian54 Lieutenant General Drives: MW E93 M3/E89 Z4 35i Join Date: Jun 2009 Location: The Valley, SoCal Posts: 15,351 iTrader: (258)	I used to have an AA HFC Xpipe I did like the sound (it was a bit raspy and raw, as I had it hooked up with an OEM rear), but it bothered me that it would sometimes scrape when I went over steep bumps and driveways. it's simply a design flaw __________________ Next track day: http://www.m3post.com/forums/showthread.php?t=651089 Sorry I'm just someone who comes on here to fill a void..I dont have the $ to own a BMW. This is a nice E93:http://www.e90post.com/forums/showthread.php?t=434032

08-01-2012, 05:13 PM	#10
dapopa9 Lieutenant Drives: 2008 E90 M3 Join Date: Apr 2008 Location: San Diego Posts: 473 iTrader: (0)	Yes it hangs a bit lower than the stock setup. Make sure the heatshield is not touching the pipes...that is most likely what is causing your vibration. __________________

07-31-2012, 08:08 PM	#2
newmedicines Private Drives: Grey Join Date: Jul 2012 Location: Socal Posts: 88 iTrader: (0)	Sorry if its unrelated but what exhaust did you put your hfc with? Did it throw any cel?

07-31-2012, 10:00 PM	#4
warp10 Lieutenant Drives: 2011 M3 Jet Black:ZCP, ZCV, ZP Join Date: May 2011 Location: Atlanta, Ga Posts: 418 iTrader: (0) Garage List 2011 M3 [5.00] 2011 28i X3 [0.00]	The clamps that hold the hfc are right up against the heat shield and vibrates under a heavy acceleration. It is just causing some ground clearance issues. Any one else have this issue?

07-31-2012, 11:56 PM	#6
warp10 Lieutenant Drives: 2011 M3 Jet Black:ZCP, ZCV, ZP Join Date: May 2011 Location: Atlanta, Ga Posts: 418 iTrader: (0) Garage List 2011 M3 [5.00] 2011 28i X3 [0.00]	Read my post in another thread about what to do to get rid of vibration. You need to bend the heat shield in several places and i listed all the ones to check. You are likely hitting the black "brace" as well and would be better served by removing it and replacing the bolts back on the frame without the black thing. It WILL fit well with no vibration after all this is done. What pisses me off is why a big company like AA cannot make a factory fitting exhaust pipe. I mean they don't even put all the same hanger points on the thing as they leave out one of them near the high flow cat area. Just not that hard to make something fit like factory. THe thing is its not even the high flow cats that are a bad fit, even though those are the only thing I could understand being hard to fit due to the size. Oh well. worth it for the sound IMO. I love the sound[/quote] Can you post the link to your thread you mentioned. Also I agree that the sound is worth it!'

08-01-2012, 05:32 AM	#8
pbonsalb Major Drives: 08 E90 M3, 99 E36 M3 Turbo Join Date: Feb 2011 Location: Concord, NH Posts: 1,170 iTrader: (3)	V Band clamps do require an extra 3/4 inch on top and on bottom (and on the sides) and this reduces clearance. But they make it easy to install and remove a section of exhaust and they usually don't leak. You can remove it and weld the HFC section in place. You can cut it out and use a 3 inch wide band clamp that fits flush everywhere except the joint (and you can locate that on the side).

08-01-2012, 11:38 AM	#9
s65power New Member Drives: 2012 M3 Join Date: Aug 2012 Location: Cali Posts: 20 iTrader: (0)	I had this problem with the Fabspeed setup on the left side. It would hit over speed bumps. I wound up selling that exhaust and never got that resolved. Some cats have trouble fitting and you have to pound the heat shield to make enough room. I don't have experience with the AA one but it sounds good!

08-01-2012, 07:55 PM	#12
SalDoyley New Member Drives: bmw Join Date: Aug 2012 Location: you are Posts: 5 iTrader: (0)	Nothing you can really do-I tried a bunch to get this up higher __________________

08-01-2012, 08:09 PM	#13
C\|3R1C So Kewl Guy Drives: 2010 E93 M3 DCT Join Date: Sep 2011 Location: Los Angeles Posts: 407 iTrader: (0)	I'm trying a way next week to raise the pipe a little (the catback at least) ill let you know how it works. __________________ 2010 E93 M3 / AA Catless X-Pipe / AA Catback / Vorsteiner Vented Hood and Bootlid E93 Trunk / ADV1 7.1 Wheels GB / LS3 LED Lights / AFE Stage 2 / Velos Designwerks Tune In progress: AA Pulley

08-02-2012, 10:41 AM	#16
aus Major General Drives: M3 Join Date: Jul 2005 Location: Seal Beach, CA Posts: 6,172 iTrader: (5)	Wonder why this hasn't been brought up in the past? . __________________ Let me get this straight... You are swapping out parts designed by some of the top engineers in the world because some guys sponsored by a company told you it's "better??" But when you ask the same guy about tracking, "oh no, I have a kid now" or "I just detailed my car." or "i just got new tires."

08-02-2012, 03:25 PM	#17
Zzhou Lieutenant Drives: 2012 E92 SSII ZCP DCT Join Date: Aug 2011 Location: West Lafayette,IN/Shanghai,China Posts: 522 iTrader: (0)	my AA catless x-pipe has kinda same issue with the clamp, i just bend the heat shield and that will help. but still has vibration. I paired with AA exhaust. __________________ AA Green Filter/AA Pulley/AA catless X-pipes/AA signature exhaust/AA TUNE/TMS studs/Project Kics R40/AD08/Vorsteiner GTS5 Bumper/LUX H8

08-03-2012, 06:37 AM	#18
edwinm3 Captain Drives: 2008 JEREZ BLACK M3 Join Date: Nov 2011 Location: Doral Posts: 762 iTrader: (2)	I don't know what's wrong, maybe it needs some adjustment. Mine is perfectly leveled and no scraping or vibration/rattling __________________ AA Exhaust, AA X Pipe, AA SSK, AA Geen Air filter, AA Pulley, AA Tune

08-03-2012, 08:50 AM	#19
bigjae1976 Brigadier General Drives: 04 330Ci, 11 E90 M3 Individual Join Date: Mar 2006 Location: Milwaukee, WI Posts: 4,047 iTrader: (8)	Just hammer and bend it into an oval. __________________

08-11-2012, 11:50 PM	#21
VCMpower Captain Drives: 2010 Dakar Edition M3-all ops Join Date: Jan 2010 Location: Victoria B.C. Posts: 641 iTrader: (0)	It's unfortunate, but they are so effective at the task. __________________ Active Autowerke GEN 2 Level 3 591whp 410tq(@7500rpm) Dyno Dynamics 8% correction

08-12-2012, 01:01 AM	#22
330iTiAg First Lieutenant Drives: 2011.5 E92 M3 Join Date: Jun 2006 Location: Columbia, MD Posts: 327 iTrader: (0)	Couldn't a muffler shop weld on the missing OEM hanger position(s)? __________________ 2011.5 M3 Coupe: Space Gray, 4MY, ZCP, ZCV, ZP2, 494, 5AC, 655, and 752 Mods: Full Venture Shield protection kit, RPi scoops, Euro fog light switch, LUX 3.0, clear reflectors, OEM black chrome grilles and side gills

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