The Subaru STI EJ257B engine features dual AVCS (Active Valve Control System). This feature enables the builder to extract massive power while retaining great low-end driveability. The Kelford range of camshafts features a very new camshaft design technology termed 'ICE'. This design technique results in an efficiency gain for these engines. No other aftermarket camshaft company offers this approach for the EJ25 engine platform.
Kelford's Stage 2 220-C camshaft set is profiled for the street and racing. Stage 2 cams feature a 272-degree intake and 268-degree exhaust cam, the high lift measures 11.30mm and 10.50mm. The camshafts require cylinder head clearancing for fitment and must use shimless buckets along with aftermarket ECU tuning.
Features / Specs
Cam Lift: Intake = 11.50mm , Exhaust = 10.75mm
Rocker Ratio: Intake = 1 , Exhaust = 1
Net Valve Lift: Intake = 11.30mm , Exhaust = 10.50mm
Kelford Cams 220-C: Street / Race
Advertised Duration: Intake = 272 , Exhaust = 268
Duration @ 1.0mm Valve Lift: Intake = 232 , Exhaust = 228
Timing @ 1.0mm Valve Lift: IVO = 14 ATDC , EVO = 60 BBDC , IVC = 66 ABDC , EVC = 12 BTDC
Suggested Centerline: Intake = 130 ATDC , Exhaust = 126 BTDC
Valve Lift @ TDC: Intake = 0.12mm , Exhaust = 0.17mm
Recommended Valve Springs: Part# KVS109-STi Valve Springs, Part# KVS1847-BT Beehive Valve Springs
Requires cylinder head modification to fit.
Good on E85 fuel.
Must have shimless buckets
Aftermarket ECU and Tuning required