I'll go for a custom dyno-tune and have a Chev dealer who installs Centrifugals work on it before I take it out! the Centrifugal he installs was an option, but for the price of his blower I got the Radix, sways, plugs & wires, brakes, headers and shift kit. see: www.wiltonmotors.com. Thot that was alot to pay for the warranty, but I guess the hassel meter is ticking! R/