EVO 8 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. Not for OEM hydraulic lifters, must convert to solid lifter. For up to 8500rpm and 35psi boost Kelford Cams recommend valve spring KVS63-BTK.