Originally Posted by PenisFace

Ecu Tuning on an otherwise bone stock Evo 8 added 30-35 hp. 0-60 in 4.5 seconds, 13.0 quarter mile.

Ecu tuning, downpipe, catback exhaust, and passive boost solenoid emulator added 70 hp. 0-60 4.3 seconds, 12.8 quarter mile.

ecu tuning, passive boost solenoid emulator, 3" catback exhaust, 3" downpipe with high-flow cat, adjustabe camgears, and upgraded fuel pump added 90 hp.0-60 4 seconds, 12.5 quarter mile.

Ecu tuning, passive boost solenoid emulator, 3" catback exhaust, 3" downpipe with high-flow cat, adjustable camgears, HKS camshafts, and upgraded fuel pump adds 120-130 hp. 0-60 3.8 seconds, 12.1 quarter mile

The cream of the crop from the site i'm getting this from upgrades tons of stuff, but isnt too cheap. upgraded turbo, cams, ecu, etc for 550whp, 0-60 3 seconds, 11.2 quarter mile.

You could easily add more, but those are the least expensive and most common evo 8 upgrades. The stock turbo is good for 430 hp and tq or around there.