These racing cams are designed for engines with high compression (12:1+), a ported cylinder head with big valves, and a well-designed intake and exhaust system. They provide more top-end power than the 'B' cam and can pull to around 10k+ rpm depending on the engine. These cams are great for very lightweight circuit racing chassis with a close ratio gearbox and All Motor drag racing cars running on race gas.
- Kelford Cams recommend using their KVS109-3S valve spring with these cams.