Hey guys I have a 2004 G35 Sedan 6MT. I recently got it dyno'd at Sublime Speed Technology in Omaha.
This is the list of mods that were on my car when I bought it.

Engine:
-Stillen Intake
-Custom Magnaflow header back exhaust

Suspension:
-Hotchkis Sway Bars (front and rear)

Wheels and Tires
-17" Kosei wheels wrapped in Toyo Proxes (shown in attached picture)
-17" Kosei wheels wrapped in Bridgestone Blizzak LM-22


Here are the dyno results attached below

 

good to know. that gives me a ballpark of what i'd see with mine. i know diff dynos yield diff numbers, but this is a start. using 10% driveline power loss that's about 280flywheel hp which sounds right...