282° high HP solid lifter racing cams to suit well built time attack and drag racing engines. Suits 700hp+ 62mm+ turbo. Great with E85 and similar ethanol blend fuels. Broader power band and improved throttle response when using MIVEC. Not for OEM hydraulic lifters, must convert to solid lifter. For up to 9000rpm and 40psi boost Kelford Cams recommend valve spring KVS63-EXTREME.