Fastwong
2579
More power, maybe even on the weight?
Power is up to 440hp at the wheels, under 6k rpm not too different from stock but 6k-8k rpm is a rush (early 430hp dyno before exhaust and final tuning but this is close)

I never weighted the car post mods but I guess around even? Rollbar is heavy and X51 intake is aluminum instead of plastic but lion battery, wheels, and titanium exhaust are all lighter.
Stock intake:

X51 with larger runners
Wheels are lighter after BBS swiss cheesed them:
Custom pistons are the same weight but stronger and coated:
Bigger 550hp 4.5L engine getting built: