EVO 9 solid lifter 272° cams. The best all round performing motorsport cams. These are the solid lifter version of our mega popular TX272 profile. Suits racing 4G63 engines in the 400-700hp range. 54-64mm turbo size range. Broader power band and improved throttle response when using MIVEC. Not for OEM hydraulic lifters, must convert to solid lifter. For up to 8500rpm and 35psi boost Kelford Cams recommend valve spring KVS63-BTK.