Produces solid bottom-end performance and gains above 2800 RPM compared to the stock cams. Direct bolt-in replacement for M-Eight engines; can be used with stock valve springs, pushrods, lifters and exhaust. Will respond well when used with slip-on mufflers or a full exhaust system and a high-flow air cleaner. Use of performance valve springs is not required but may result in a quieter, smoother-running valve train. Responds well when combined with increased engine bore and/or compression