Our stage-2 custom tune is rated at 600 HP on pump gas. We offer custom race gas files and custom  tuning via data logs when the 5 tune option is selected upon purchase.  This kit comes with our high flow X  design 2 muffler race exhaust with Gesi Sport EPA approved high flow catalytic converters( custom made per client specs). We strongly suggest o the 4.5″ Race  Intercoolers and for more power upgraded VTG compressor wheels(Tial Zona 65mm or 63.5mm).  We can upload multiple tunes via our hand held flasher purchased separately.