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Apart from the above, the new Y62 has variable intake and exhaust valve timing. Find some really smart guy who can tune this, as in break into the ecu and just program the timing so it's sounds as you wish. These aren't ancient old tech push rod dinosaurs like you would find in a commodore. These are nice quiet well built engines. If you want them to sound nice throw a full exhaust system on with a supercharger or step it up a bit and turbocharge the big girl.