upgrades? Jul 11, 2014 23:41:27 GMT -5 Quote Select PostDeselect PostLink to PostMemberGive GiftBack to Top Post by Stinger on Jul 11, 2014 23:41:27 GMT -5 Yes, listed here with approximate power gains: www.stinger-performance.com/faq.htmlOur exhaust is worth about 45hp, FMIC 30hp+, filter 13hp, boost valve about 5-6hp per psi.