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      02-04-2013, 10:19 PM   #11
Drives: E90 328xi
Join Date: Jul 2012
Location: Pittsburgh, PA

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Originally Posted by E46driver View Post
Then doesn't that mean the n51 cars come from the factory with more power overall?
no. the compression ratio of the n51 is lower.. not by much, just a little. I am pretty sure the n51 also has an extra set of cats. someone can correct me if i'm wrong, but i think those are the two biggest differences
2007 328xi - Sport Package - Cold Weather Package - 6MT - AA Stage 2 Tune - BMW PE - Secondary Cats Removed - 3 Stage Intake Manifold - AFe Stage 2 SI Intake - Cyba Scoops - CDV Delete - H&R Sport Springs & RSB - Bilstein Sport Shocks - 335xi Brakes, Black Kidneys - CF Mirror Caps - Custom Gunmetal Powder Coated M-Parallels
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