Help Needed

Pablito1702 · 01-20-2010, 11:45 PM

Just received BMW Performance Exhaust System. There are three indents on the mid-pipe, two small ones and one large (see photos). Are these supposed to be there or is this some sort of defect?? Any responses from those who have direct experience with this system would be much appreciated

BroDoze · 01-21-2010, 12:20 AM

I'd be freakin' PISSED.

akak1997 · 01-21-2010, 12:57 AM

They are there BY DESIGN. It is quite freaky when you see them, like some guy just bang on your exhaust against the wall or something. But when you look at your stock exhaust, there are indents too to clear various things, like the diff housing...

HondaGoneRogue · 01-21-2010, 01:15 AM

Quote:

Originally Posted by akak1997

They are there BY DESIGN. It is quite freaky when you see them, like some guy just bang on your exhaust against the wall or something. But when you look at your stock exhaust, there are indents too to clear various things, like the diff housing...

+1

InsaneSkippy · 01-21-2010, 09:57 AM

Quote:

Originally Posted by Brahmzy

I'd be freakin' PISSED.

You'd be angry that your exhaust arrive in the exact form it was designed/created? I'd be pretty happy.

oldman · 01-21-2010, 10:04 AM

I have the same exhaust and the same indents. The fact that there are indents on the stock and the PE obviously means they are there on purpose for whatever reason.

enigma135 · 01-21-2010, 10:46 AM

Originally Posted by akak1997 View Post
They are there BY DESIGN. It is quite freaky when you see them, like some guy just bang on your exhaust against the wall or something. But when you look at your stock exhaust, there are indents too to clear various things, like the diff housing...

Quote:

Originally Posted by HondaGoneRogue

+1

+2

Had the same concerns, Evan at Tischer showed me another one with the same indents, and assured me they are supposed to be there. Enjoy your new exhaust

Pablito1702 · 01-21-2010, 10:59 AM

Quote:

Originally Posted by akak1997

They are there BY DESIGN. It is quite freaky when you see them, like some guy just bang on your exhaust against the wall or something. But when you look at your stock exhaust, there are indents too to clear various things, like the diff housing...

Just got confirmation from Evan at Tischer BMW, that this is the way the system ships from BMW, so apparently it IS by design (assume for clearance issues). But it does give you a shock if you are not expecting the pipe to look that way. Having exhaust system and BMW performance tuning kit installed starting today, so I am glad I resolved my concerns. I will post my impressions of both exhaust and tuning kit, when I get the car back.

BroDoze · 01-21-2010, 12:00 PM

Quote:

Originally Posted by InsaneSkippy

You'd be angry that your exhaust arrive in the exact form it was designed/created? I'd be pretty happy.

Depending on how much HP you're wanting to squeeze out of the car, I wouldn't want any pinching on my pipes. What's the point of paying $1K for mandrel bent this and that, only to have, what look to be, fairly sizable irregularities in the exaust flow.

Anybody else not find this strange? Ok, if it's by design, but then I'd question the design...

You won't see that in Maddad or any other performance exhausts...

InsaneSkippy · 01-21-2010, 12:04 PM

Quote:

Originally Posted by Brahmzy

Depending on how much HP you're wanting to squeeze out of the car, I wouldn't want any pinching on my pipes. What's the point of paying $1K for mandrel bent this and that, only to have, what look to be, fairly sizable irregularities in the exaust flow.

Anybody else not find this strange? Ok, if it's by design, but then I'd question the design...

You won't see that in Maddad or any other performance exhausts...

Do you really think companies like Maddad have the kind of R&D money BMW does? Budget aside, BMW BUILT this engine, they know it better than any vendor could ever hope. Obviously BMW wouldn't do it if there wasn't a reason for it. Why would they go through the trouble of putting in the dents if there was no reason for it?

How much HP loss do you think these dents cause?

Bottom line, he got exactly what he ordered, the dents have been discussed many times before. There's no reason he should be pissed about it like you suggested.

BroDoze · 01-21-2010, 12:11 PM

Quote:

Originally Posted by InsaneSkippy

Do you really think companies like Maddad have the kind of R&D money BMW does? Budget aside, BMW BUILT this engine, they know it better than any vendor could ever hope. Obviously BMW wouldn't do it if there wasn't a reason for it. Why would they go through the trouble of putting in the dents if there was no reason for it?

How much HP loss do you think these dents cause?

Bottom line, he got exactly what he ordered, the dents have been discussed many times before. There's no reason he should be pissed about it like you suggested.

And has the BMW Perf exhaust been accurately dyno'd for real gains vs. stock and others?

ESC OFF · 01-21-2010, 12:22 PM

Those dents are German Engineered to provide just the right amount of back-pressure....I even added some aftermarket dents to mine to make it *special*..

Enjoy the new exhaust

you will love the gurgle, especially at start-up...

1malt · 01-21-2010, 01:40 PM

Quote:

Originally Posted by ESC OFF

Those dents are German Engineered to provide just the right amount of back-pressure....I even added some aftermarket dents to mine to make it *special*..

Enjoy the new exhaust

you will love the gurgle, especially at start-up...

Special dent, I gotta get me some of those

IZAGLO · 01-23-2010, 07:21 PM

LOL...indeed...I did notice the stock exhaust does have some dents.
Had the BMW Factory Sport Exhaust installed last week. Nice unit, and yes it does sound good on start-up. The car is still fairly quiet especially with the windows up. I did notice a slight drone at 60-65 mph when the car is lugging in 6th gear. Also i did notice the exhaust sticks out a bit more than stock because it was designed to be used with the sport diffuser.....which i am ordering from ICarbon next week...All in all a nice exhaust....Not nearly as loud as my CP-E TBE i had on my last car......but with this puppy, i will NEVER go off warranty...toooooo many problems going that route on my last ride...say what you want about some dealers being mod friendly.....they are till something major happens then you are at there mercy....never again.....so BMW and Dinan for now....

01-20-2010, 11:45 PM	#1
Pablito1702 Pablo 39 Rep 263 Posts Drives: 2009 135i Join Date: Dec 2009 Location: Orange County, CA iTrader: (3)	Help Needed - Indents on BMW Performance Exhaust Just received BMW Performance Exhaust System. There are three indents on the mid-pipe, two small ones and one large (see photos). Are these supposed to be there or is this some sort of defect?? Any responses from those who have direct experience with this system would be much appreciated Attached Images
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01-21-2010, 12:20 AM	#2
BroDoze Captain 168 Rep 807 Posts Drives: Stuff Join Date: Nov 2009 Location: Colorado iTrader: (0)	I'd be freakin' PISSED. __________________ ///M
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01-21-2010, 12:57 AM	#3
akak1997 Major 62 Rep 1,159 Posts Drives: BMW 135 @ 135mph Join Date: Aug 2008 Location: Los Angeles iTrader: (2) Garage List 2008 135i [0.00]	They are there BY DESIGN. It is quite freaky when you see them, like some guy just bang on your exhaust against the wall or something. But when you look at your stock exhaust, there are indents too to clear various things, like the diff housing...
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01-21-2010, 10:04 AM	#6
oldman . 31 Rep 439 Posts Drives: 09 135i AW Coupe Join Date: Sep 2008 Location: NSW Australia iTrader: (0)	I have the same exhaust and the same indents. The fact that there are indents on the stock and the PE obviously means they are there on purpose for whatever reason. __________________ __________________ MY09 135i AW \| Manual \| Pro NAV \| CA \| Logic 7 Hi Fi \| BMW Performance Exhaust \| BMS Dual Intake \| iCarbon CF Rear Diffuser \|
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01-21-2010, 12:22 PM	#12
ESC OFF Major 40 Rep 1,058 Posts Drives: 1M, CaymanS, 914, 500 Abarth Join Date: Oct 2009 Location: Chicago iTrader: (0)	Jeez it's just an exhaust Those dents are German Engineered to provide just the right amount of back-pressure....I even added some aftermarket dents to mine to make it special.. Enjoy the new exhaust you will love the gurgle, especially at start-up... __________________ The faster you go, the better it feels
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01-23-2010, 07:21 PM	#14
IZAGLO Mbira 30 Rep 1,011 Posts Drives: Sedonna Red 09 135i SOLD Join Date: Jan 2010 Location: Garage cleaning Brake Dust iTrader: (3)	LOL...indeed...I did notice the stock exhaust does have some dents. Had the BMW Factory Sport Exhaust installed last week. Nice unit, and yes it does sound good on start-up. The car is still fairly quiet especially with the windows up. I did notice a slight drone at 60-65 mph when the car is lugging in 6th gear. Also i did notice the exhaust sticks out a bit more than stock because it was designed to be used with the sport diffuser.....which i am ordering from ICarbon next week...All in all a nice exhaust....Not nearly as loud as my CP-E TBE i had on my last car......but with this puppy, i will NEVER go off warranty...toooooo many problems going that route on my last ride...say what you want about some dealers being mod friendly.....they are till something major happens then you are at there mercy....never again.....so BMW and Dinan for now....
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