I'm more suprised that the engine makes power all the way up to 8400rpm. A lot of people can get an engine to spin that high but getting it to flow is a different story.
'06 Arctic Metallic 325i | Sport Package | 6MT | Dinan Stage III suspension | Dinan exhaust | 330i manifold swap! Click here!
| Active Autowerke tune | 135i Brake Calipers | Deiselboost caliper brackets | E46 M3 front rotors