Our stage-3 custom tune is rated at 600HP on pump gas and 620HP on 100 octane race gas. This kit includes our X design 2 muffler race exhaust with Gesi high flow EPA approved catalytic converters, 3.5″ sport intercoolers, and custom tuning. Optional upgrade to the 4.5″ race intercoolers for additional fee is available. We offer custom race gas files as well as brake boosting along with launch control upon request. We can upload multiple tunes via our hand held flasher purchased separately.