6.3L = 507 hp
4.0L = 414 hp
The engine is 50% greater than BMW S65 and still can't product impressive hp like BMW engine. Not for me.
14 F30 335i Melbourne Red
13 E93 M3 Melbourne Red
12 E93 Space Gray ( Retired BMW buy back )
2006 E90 ( sold ) 09 E82 Space Gray ( sold )
My next vehicle would be a Zamboni