power for power, this is what you'll get:
N52B30: base BHP 230 hp + 299 tq
performance mods:
- AA tune upgrade: 15 hp, 12 tq gain
- BMW performance intake: 3hp, 3 tq gain
- Exhaust: ~ 5-10 hp gain...
N54: 300 hp, 295 tq.
There's more you can do, but that's just basic numbers.
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