handle the high heat that the boost and outside temperatures create ..the sport 600's will generate less heat at higher boost settings than the sport 500's. If you plan to run more than 20psi on pump gas ...get high octane fuel and / or forged pistons ....water injection will help also lower intake temperatures as well ..
~~ 430rwhp and 460 lbs/tq ~~ ( on Sport 500's )
~~ 400 rwhp from 4500 RPM's to red line ~~ :) ~~ 400 ft/lbs from 3700 RPM's to red line ~~ :)