E46Fanatics - View Single Post - Difference between s54 and m54
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Old 10-20-2010, 10:54 PM   #12
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Join Date: Jun 2010
Location: Ontario
Posts: 12
My Ride: 330Ci
Originally Posted by PEI330Ci View Post
It's in the cylinder head.

S54 Intake port = 275 CFM

M54 Intake port = 200 CFM

The rest of the stuff listed above is small potatoes. Want proof? I strapped an ITB intake onto a built M54 and lost 30rwtq and gained peak 5rwhp. Yuck!
Ding ding ding!!!
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