Kelford Cams: 258/268 | Drop-In Turbo K20C4

258°/268° drop-in cams for the K20C4. These cams are designed to maximise the limitations of the OEM valve spring in street/track day cars. Cam profiles designed to be kinder to valvetrain to allow more valvetrain safety when adding additional boost. Good mid-range to higher rpm gains. Suits OEM turbo or bolt-on turbo upgrade (48-55mm) with a reflash of stock ECU. Maintains smooth idle. Must retain OEM rpm limit with OEM valve spring. Primary exhaust lobe spec: 244° / 9.9mm