Description
ProMaxx BBC 317cc As Cast (Bare Heads) = $1150 pr
Specs:
2.250″/1.880″ valve sizes,
119cc chambers
317cc Intake Runner
Flow Specs @ 28″ w/2.250″/1.880″ w/30° Backcut valves
.200″ .300″ .400″ .500″ .600″ .700″ .800″ .900″
Intake 151 230 292 338 367 379 372 379
Exhaust 120 162 197 238 254 260 270 270
Add $500 for Assembled Heads for Flat Tappet cams up to.650″ lift:
Stainless Steel Erson Competition Series 2.250″/1.880″ Valves 11/32″
Erson 3425 Dual 1.460″ Springs 125lb @ 1.900″ / 415 @ 1.250″ .650″ max lift
Erson Steel Retainers, 7* Locks,7/16″ Rocker Studs, 3/8″ Guide Plates, Viton Seals
Add $600 for Assembled Heads for Hyd. Roller cams up to.650″ lift:
Stainless Steel Erson Competition Series 2.250″/1.880″ Valves 11/32″
Erson 3600 Dual 1.540″ Springs 180lb @ 1.950″ / 500 @ 1.300″ .700″ max lift
Erson Steel Retainers, 10* Locks,7/16″ Rocker Studs, 3/8″ Guide Plates, Viton Seals
Add $800 for Assembled Heads for Solid Roller cams up to.780″ lift:
Stainless Steel Erson Competition Series 2.250″/1.880″ Valves 11/32″
Erson 3870 Dual Cyloy 1.625″ Springs 235lb @ 2.00″ / 680 @ 1.300″ .780″ max lift
Erson Titanium Retainers, 10* Locks,7/16″ Rocker Studs, 3/8″ Guide Plates, Viton Seals
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