2JZ VVTi Engine Camshaft. 260° street performance cams. Improved low to mid-range power and fast spool. Ultimate throttle response with VVTi. Suits upgraded twin turbos or single turbo conversion 54-64mm. Can use OEM valve spring up to stock boost and rpm limit. For up to 7500rpm and 30psi boost Kelford Cams recommend valve spring KVS02.