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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

 
 
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Old 07-31-2012, 10:47 AM
bricas45's Avatar
bricas45 bricas45 is offline
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Location: New Hampshire
 
Join Date: Jan 2009
Posts: 1,038
Mein Auto: '01 540i6, '94 325is
Quote:
Originally Posted by eparayno View Post
Great NA numbers Bricas. Goes to show how huge of a bottleneck the stock headers are. M54 guys dyno'd 15-20ish HP increase with just headers, no cats or high flow cats and the stock exhaust piping on the E46. Would you happen to have a side by side pic of the stockers and A1 headers?
Here is a side by side of the a1 headers with stock M5 (540i non-vanos) exhaust manifolds. And a seperate photo of the 540i vanos exhaust manifolds.
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2001 540i - Orient Blue

M5 bumpers, wheels, mirrors
S/C, water/air IC
A1 Headers, Random Technology Cats, Eissenmann Exhaust
3.15 diff, evosport power pullies
Koni Sports, Eibach Springs/Sway Bars

Last edited by bricas45; 07-31-2012 at 01:03 PM.
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