for Evolution Big Twin

The Big Twin Evolution engine is ideally suited for the installation of hotter cams. The cylinder head design combined with the latest hydraulic lifters allow 6000 RPM and more even with Original valve springs. For maximum performance we recommend the use of adjustable pushrods.

The cam that S&S uses in their Hot Set Up kits. Best suited for stroker motors up to 88 cui.with 9.5:1 and higher compression ratio or big inch engines up to 98 cui and compression ratios up to 9.5 - 10:1. Moderate duration makes for great mid range performance where most riding is done. Hi-lift springs and collars and adjustable pushrods are required. All clearances must be checked.