I really did not Believe they did Substantially about the bigport and smallport? I'd a S/T 20v as soon as that hated everyday living when it had been disconnected.. I've read the 5500 rpm Restrict has something to accomplish with the ignitor/ ecu/ dizzy setup. CAn anybody get rid of https://4age20vblacktopforsale37935.blogchaat.com/26775400/the-best-side-of-blacktop-20v-4age