264° street/drift performance cams. Improved low to mid-range power and fast spool. Ultimate throttle response with NVCS. Suits turbo upgrade 54mm-62mm. OEM spring can be used up to 7500rpm and 14psi of boost. For higher rpm and boost Kelford Cams recommend the drop-in valve spring KVS25NEO-DI. No cylinder head clearancing required. OEM base circle diameter. Yoke style trigger fitted to the exhaust cam for CAS.