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Skunk2 Racing
Skunk2 Racing Camshaft and Valve Train Applications

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VTEC Camshaft
Honda/Acura
Engine CodeEngine TypeTypeLift/DurationPart NumberNote
D16Z1.6L SOHC VTECStage 1IN. 0.448/225305-05-0100Valvetrain upgrade recommended
EX. 0.410/249
D16Y1.6L SOHC VTECStage 1IN. 0.448/225305-05-0120Valvetrain upgrade recommended
EX. 0.410/249
B16A-B, B17A, B18C1-51.6L-1.8L DOHC VTECStage 1IN. 0.456, 252305-05-0140Valvetrain upgrade recommended. CARB Exempt
EX. 0.426, 249
Stage 2IN. 0.485, 266305-05-0145Valvetrain upgrade required
EX. 0.466, 262
Stage 3IN. 0.504, 270305-05-0150Valvetrain upgrade required
EX. 0.465, 279
Turbo 1IN. 0.409,223305-05-0156Pro Series valve springs recommended for Turbo applications; P/N 311-05-5350
EX. 0.394,227
Turbo 2IN. 0.433,231305-05-0157Pro Series valve springs recommended for Turbo applications; P/N 311-05-5350
EX. 0.417,236
Pro 1IN. 0.496,264305-05-5140Valvetrain upgrade required
EX. 0.469,264
Pro 2IN. 0.504,270305-05-5145Valvetrain upgrade required
EX. 0.473,276
Pro3IN. 0.512,277305-05-5150Valvetrain upgrade required
EX. 0.488,284
H22A2.2L DOHC VTECStage IIN. 0.475, 255305-05-0200Valvetrain upgrade recommended
EX. 0.436, 255
Stage IIIN. 0.505, 270305-05-0205Valvetrain upgrade required
EX. 0.465, 275
Turbo ITBA305-05-0216Dual Valve Springs recommended for Turbo applications; P/N 311-05-0360
TBA
Turbo IITBA305-05-0217Dual Valve Springs recommended for Turbo applications; P/N 311-05-0360
TBA
Pro 1TBA305-05-5200Valvetrain upgrade required
TBA
Pro2TBA305-05-5205Valvetrain upgrade required
TBA
Pro 3TBA305-05-5210Valvetrain upgrade required
TBA
K20A22.0L DOHC i-VTECStage 1IN. 0.531,266305-05-0220Valvetrain upgrade recommended
EX. 0.492,262
Stage 2TBA305-05-0225Valvetrain upgrade required
TBA
Stage 3TBA305-05-0230Valvetrain upgrade required
TBA
Turbo 1TBA305-05-0236Pro Series valve springs recommended for Turbo applications; P/N 311-05-5350
TBA
Turbo 2TBA305-05-0237Pro Series valve springs recommended for Turbo applications; P/N 311-05-5350
TBA
K20A3, K24A1/A3/A4DOHC i-VTECStage 1TBA305-05-0250Valvetrain upgrade recommended
TBA
Stage 2TBA305-05-0255Valvetrain upgrade required
TBA
Stage 3TBA305-05-0260Valvetrain upgrade required
TBA
Turbo 1TBA305-05-0265
TBA
Mitsubishi
Engine CodeEngine TypeTypeLift/DurationPart NumberNote
4G63BT2.0L DOHC 2003-05 EVO VIIISetIN. 10.8,264305-06-0240
EX. 10.2,272
264 IntakeIN. 10.4,264305-06-0242
272 Exhaust EX. 9.8,272305-06-0244

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Intake Valves
Engine CodeEngine TypeCompressionStock Size+0.5mm+1.0mm
D16Z1.6L SOHC VTECStandard310-05-0420310-05-0423---
High310-05-0410310-05-0413---
B16A-B, B17A, B18C1-51.6L-1.8L DOHC VTECStandard310-05-0340310-05-0343---
High310-05-0330310-05-0333---
H22A2.2L DOHC VTECStandard310-05-0380310-05-0383310-05-0385
High310-05-0370310-05-0373310-05-0375
K20A/K24A2.0L/2.4L DOHC i-VTECStandard310-05-0441310-05-0443310-05-0440
High310-05-0436310-05-0439310-05-0444

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Exhaust Valves
Engine CodeEngine TypeCompressionStock Size+0.5mm+1.0mm
D16Z1.6L SOHC VTECStandard310-05-0400310-05-0403---
High310-05-0390310-05-0393---
B16A-B, B17A, B18C1-51.6L-1.8L DOHC VTECStandard310-05-0320310-05-0323---
High310-05-0310310-05-0313---
H22A2.2L DOHC VTECStandard310-05-0360310-05-0363310-05-0365
High310-05-0350310-05-0353310-05-0355
K20A/K24A2.0L/2.4L DOHC i-VTECStandard310-05-0431310-05-0433---
High310-05-0426310-05-0429---

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Complete Intake & Exhaust Valves Sets
Engine CodeEngine TypeCompressionStock Size+0.5mm+1.0mm
D16Z1.6L SOHC VTECStandard310-05-2410310-05-2430---
High310-05-2420310-05-2440---
B16A-B, B17A, B18C1-51.6L-1.8L DOHC VTECStandard310-05-2310310-05-2330---
High310-05-2320310-05-2340---
H22A2.2L DOHC VTECStandard310-05-2350310-05-2370310-05-2390
High310-05-2360310-05-2380310-05-2400
K20A/K24A2.0L/2.4L DOHC i-VTECStandard310-05-2535310-05-2537---
High310-05-2540310-05-2543---

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Racing Valve Springs
Engine CodeEngine TypeSeat PressureOpen PressureMax. LiftNotePart Number
D16Y, D16Z1.6L SOHC VTEC35lbs @ 2.000"170lbs @ 0.400" Lift0.470"Single Springs311-05-0340
D16Y, D16Z1.6L SOHC VTEC TURBO   Single Springs311-05-0345
B16A-B, B17A, B18C1-51.6L-1.8L DOHC VTEC72lbs @ 1.300"185lbs @ 0.400" Lift0.495"Dual Springs311-05-0350
B18A-B, B20B-Z1.8/2.0L DOHC Non-VTEC   Single Springs311-05-0370
H22A2.2L DOHC VTEC100lbs @ 1.400"240lbs @ 0.500" Lift0.530"Dual Springs311-05-0360
K20A2-32.0L DOHC i-VTEC   Dual Springs311-05-0380
K20A52.0L DOHC i-VTEC   Dual Springs311-05-0380
K24A1-22.4L DOHC i-VTEC   Dual Springs311-05-0380
Pro Series Dual Valve Springs
B16A-B18C1-51.6/1.8L DOHC VTEC   Dual Springs311-05-5350
K20A2-32.0L DOHC i-VTEC   Dual Springs311-05-5380

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Valve Spring & Retainer Kits
YearModelNoteStandardPro Series
Mitusbishi
2003-2005EVO VIII 2.0L 4G63Bt DOHC(Includes Spring Base Kit) 16 Spings / 16 Retainers311-06-0390311-06-5390
Subaru
2002-2005WRX Turbo / STi(Includes Spring Base Kit) 16 Spings / 16 Retainers311-12-0400311-12-5400

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Titanium Valve Spring Retainers
Engine CodeEngine TypePart Number
Honda/Acura
D16Z1.6L SOHC VTEC308-05-0200
B16A-B, B17A, B18C1-51.6L-1.8L DOHC VTEC308-05-0300
B18A-B, B20B-Z1.8L-2.0L DOHC308-05-2260
H22A2.2L DOHC VTEC308-05-0300
K20 / K242.0L DOHC iVTEC308-05-0410
Mitsubishi
2003-05 EVO VIII (See Valve Spring & Retainer Kit)
Subaru
2002-05 WRX Turbo / STi (See Valve Spring & Retainer Kit)

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Adjustable Cam Gears
ModelYearEngine TypeBlueRedSilverPro Series
Acura
RSX2002-20062.0L DOHC i-VTEC K20A  304-05-0270 / 304-05-0275 
TSX2004-20062.4L DOHC i-VTEC K24A  304-05-0270 / 304-05-0275 
       
Integra1990-20011.8L DOHC304-05-0180304-05-0190304-05-0200304-05-5202
Honda
Accord1990-20012.2L SOHC304-05-0230304-05-0240304-05-0245 
Civic, CRX, Del Sol1988-20001.5L-1.6L SOHC304-05-0150304-05-0160304-05-0170304-05-5170
Civic Si1999-20001.6L DOHC VTEC304-05-0180304-05-0190304-05-0200304-05-5202
2002-20062.0L DOHC i-VTEC K20A  304-05-0270 / 304-05-0275 
CRV1997-20012.0L DOHC304-05-0180304-05-0190304-05-0200304-05-5202
2002-20062.0L DOHC i-VTEC K20A  304-05-0270 / 304-05-0275 
Del Sol1994-19971.6L DOHC VTEC304-05-0180304-05-0190304-05-0200304-05-5202
Element2003-20062.4L DOHC i-VTEC K24A  304-05-0270 / 304-05-0275 
Prelude1992-19962.2L SOHC304-05-0230304-05-0240304-05-0245 
1992-19962.3L DOHC304-05-0180304-05-0190304-05-0200304-05-5202
1994-20012.2L DOHC VTEC304-05-0210304-05-0220304-05-0225304-05-5225
Mitsubishi
Eclipse Turbo1995-19992.2L DOHC 4G63BT304-06-0250304-06-0260304-06-0265 
EVO VII2003-20052.0L DOHC 4G63   304-06-5265

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