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CNC ported GM 862/706 Castings, 227cc intake runner, 84cc exhaust runner, 62cc chamber. Our stage 1 will use stock valves in the 2.0/1.55 size (sold as a pair)
SKU: wil-cnc-862-706
Free shipping
Manufacturer: Wilkes Performance
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$1,100.00

CNC ported GM 862/706 Castings

227cc intake runner, 84cc exhaust runner

62cc chamber

Our stage 1 will use stock valves in the 2.0/1.55 size

Lift Intake Flow (cfm) Exhaust Flow (cfm)
.200" 148 110
.300" 207 144
.400" 254 186
.500" 292 206
.600" 308 223
.650" 310 226

CNC ported GM 862/706 Castings

227cc intake runner, 84cc exhaust runner

62cc chamber

Our stage 1 will use stock valves in the 2.0/1.55 size

Lift Intake Flow (cfm) Exhaust Flow (cfm)
.200" 148 110
.300" 207 144
.400" 254 186
.500" 292 206
.600" 308 223
.650" 310 226
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