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Thread: 280whp 540i
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Old 07-31-2012, 09:47 AM
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bricas45 bricas45 is online now
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Join Date: Jan 2009
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Mein Auto: 335i, 540i6, X5
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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2013 - X5 35D
2009 - 335i coupe FBO
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Last edited by bricas45; 07-31-2012 at 12:03 PM.
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