BMW M3 Forum (E90 E92)

BMW Garage BMW Meets Register Search Today's Posts Mark Forums Read

Go Back   M3Post - BMW M3 Forum > E90/E92 M3 Technical Topics > Engine, Transmission, Exhaust, Drivetrain, ECU Software Modifications
Post Reply
Thread Tools Search this Thread
      10-02-2010, 01:40 AM   #1
GewoW's Avatar

Drives: E92 M3 LSB/Black 6MT
Join Date: Mar 2007
Location: Montreal, Canada

iTrader: (4)

Garage List
2011 BMW M3  [4.67]
Send a message via Skype™ to GewoW
Are the Akra pipes smaller diam than stock?

I was just looking at pictures again and it seems like the Akra has smaller diameter piping than stock...anyone want to confirm/bust this?

If yes, why?

Appreciate 0
      10-02-2010, 05:14 AM   #2
"its baby blue m3 to you sir."

Drives: Silverstone Metallic II
Join Date: Jul 2009
Location: Upland California

iTrader: (2)

Send a message via AIM to MRE90M3 Send a message via MSN to MRE90M3 Send a message via Skype™ to MRE90M3
in my uneducated opinion...
I wouldnt think so, though i have seen the Choke downs on these exhaust (in diamater) to a certain extent, *skinnier than of factory.

Then again its Titanium material, i would assume the walls to be thinner, while being strong.

HOPE i didnt give TOO wrong of an answer, this is just my uneducated .02
Appreciate 0
      10-02-2010, 11:08 AM   #3
Grease Monkey
BMRLVR's Avatar

Drives: 2011 E90 M3,1994 Euro E36 M3/4
Join Date: Apr 2006
Location: Fort McMurray, Alberta, Canada

iTrader: (3)

Akra pipes are not smaller than stock.

The Stock exhaust is not round in very many places. The stock system is mostly oval, and is flattened down in many spots on the centre section. The connecting pipes on the rear muffler are actually triangular shaped.

The Akra pipes are round and mandrel bent/hydroformed so that they maintain consistent diameter from headers to mufflers. Side by side it is easy to tell the Akra is a mud superior design where flow is concerned.
2011 E90 M3 ZCP - Individual Moonstone/Individual Amarone Extended/Individual Piano Black With Inlay:LINK!!!
1994 Euro E36 M3 Sedan - Daytona Violet/Mulberry:LINK!!!
Appreciate 0
Post Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -4. The time now is 08:25 PM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.,,,,,,,,, logo and trademark are properties of BIMMERPOST