Every intake port, every exhaust port, every valve bowl and every combustion chamber is 100% CNC machined on special, dedicated Pro 1 castings. Our 5-axis computer controlled machining centers produce compound curves and complex shapes that no human could duplicate with a hand grinder.

Features:

  • Premium alloy: Dart aluminum heads are cast from virgin 355-T61 aerospace alloy for superior strength and integrity.
  • Bolt on compatibility: 2 degree rolled valve angle and standard spacing accommodates all stock accessories.
  • Heart shaped 121cc chambers improve combustion efficiency.
  • CNC machining ensures that every chamber has the same volume so that every cylinder maintains equal compression.
  • Raised spark plug location improves flame travel for a quicker, more complete burn, producing more power.
  • Multi-angle intake seats and radiused exhaust seats greatly improve air flow.
  • Hardened exhaust seats are compatible with unleaded gasoline.
  • Exhaust ports raised .300” to improve flow (requires 1” longer head bolts next to exhaust ports).
  • Spark plug holes are machined for gasketed 3/4” reach plugs.
  • Manganese bronze valve guides ensure long term reliability.
  • All cylinder heads sold individually.

44 Items

//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000010 Dart Pro 1 BBC Head (19000010)
Pro 1 BBC 275 Oval Port Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000010M Dart Pro 1 BBC Head (19000010M)
Pro 1 BBC Marine 275 Oval Port Cylinder Head
Bare Marine Casting
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000070 Dart Pro 1 BBC Head (19000070)
Pro 1 BBC 275 Oval Port Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000070M Dart Pro 1 BBC Head (19000070M)
Pro 1 BBC Marine 275 Oval Port Cylinder Head
Bare Marine Casting
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000111 Dart Pro 1 BBC Head (19000111)
Pro 1 BBC 275 Oval Port Cylinder Head
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000112 Dart Pro 1 BBC Head (19000112)
Pro 1 BBC 275 Oval Port Cylinder Head
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000112M Dart Pro 1 BBC Head (19000112M)
Pro 1 BBC Marine 275 Oval Port Cylinder Head
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.190 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000116 Dart Pro 1 BBC Head (19000116)
Pro 1 BBC 275 Oval Port Cylinder Head
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000171 Dart Pro 1 BBC Head (19000171)
Pro 1 BBC 275 Oval Port Cylinder Head
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.190 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000172 Dart Pro 1 BBC Head (19000172)
Pro 1 BBC 275 Oval Port Cylinder Head
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.190 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19000172M Dart Pro 1 BBC Head (19000172M)
Pro 1 BBC Marine 275 Oval Port Cylinder Head
Comb Chamber : 121cc
Intake Runners : 275cc
Valves : 2.190 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100010 Dart Pro 1 BBC Head (19100010)
Pro 1 BBC 310 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100010M Dart Pro 1 BBC Head (19100010M)
Pro 1 BBC Marine 310 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100030 Dart Pro 1 BBC Head (19100030)
Pro 1 BBC 310 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100030M Dart Pro 1 BBC Head (19100030M)
Pro 1 BBC Marine 310 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100070M Dart Pro 1 BBC Head (19100070M)
Pro 1 BBC Marine 310 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100111 Dart Pro 1 BBC Head (19100111)
Pro 1 BBC 310 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100112 Dart Pro 1 BBC Head (19100112)
Pro 1 BBC 310 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100112M Dart Pro 1 BBC Head (19100112M)
Pro 1 BBC Marine 310 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100116 Dart Pro 1 BBC Head (19100116)
Pro 1 BBC 310 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100132 Dart Pro 1 BBC Head (19100132)
Pro 1 BBC 310 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19100136 Dart Pro 1 BBC Head (19100136)
Pro 1 BBC 310 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 310cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200010 Dart Pro 1 BBC Head (19200010)
Pro 1 BBC 325 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200030 Dart Pro 1 BBC Head (19200030)
Pro 1 BBC 325 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200030M Dart Pro 1 BBC Head (19200030M)
Pro 1 BBC Marine 325 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200111 Dart Pro 1 BBC Head (19200111)
Pro 1 BBC 325 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200112 Dart Pro 1 BBC Head (19200112)
Pro 1 BBC 325 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200112M Dart Pro 1 BBC Head (19200112M)
Pro 1 BBC Marine 325 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200116 Dart Pro 1 BBC Head (19200116)
Pro 1 BBC 325 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.250 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200132 Dart Pro 1 BBC Head (19200132)
Pro 1 BBC 325 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200132M Dart Pro 1 BBC Head (19200132M)
Pro 1 BBC Marine 325 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19200136 Dart Pro 1 BBC Head (19200136)
Pro 1 BBC 325 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 325cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19300030 Dart Pro 1 BBC Head (19300030)
Pro 1 BBC 345 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 345cc
Valves : 2.190 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19300030M Dart Pro 1 BBC Head (19300030M)
Pro 1 BBC Marine 345 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 345cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19300132 Dart Pro 1 BBC Head (19300132)
Pro 1 BBC 345 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 345cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19300136 Dart Pro 1 BBC Head (19300136)
Pro 1 BBC 345 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 345cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19474030 Dart Pro 1 BBC Head (19474030)
Pro 1 CNC BBC 335 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 335cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19474030M Dart Pro 1 BBC Head (19474030M)
Pro 1 BBC Marine 335 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 355cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19474136 Dart Pro 1 BBC Head (19474136)
Pro 1 CNC BBC 335 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 335cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19474139 Dart Pro 1 BBC Head (19474139)
Pro 1 CNC BBC 335 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 335cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19574030 Dart Pro 1 BBC Head (19574030)
Pro 1 CNC BBC 355 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 355cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19574030M Dart Pro 1 BBC Head (19574030M)
Pro 1 BBC Marine 355 Cylinder Head
Bare Casting
Comb Chamber : 121cc
Intake Runners : 355cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/378165c1-b0da-4c10-b3df-1669751420e9-50.jpg 19574136 Dart Pro 1 BBC Head (19574136)
Pro 1 CNC BBC Cyl Head
1.625 Dual Springs
Comb Chamber : 121cc
Intake Runners : 355cc
Valves : 2.300 Int / 1.880 Exh
//d5otzd52uv6zz.cloudfront.net/4ec4ab60-fcc8-4f05-89fa-344f7bffbd62-50.jpg 19574139 Dart Pro 1 BBC Head (19574139)
Pro 1 CNC BBC 355 Cylinder Head
Comb Chamber : 121cc
Intake Runners : 355cc
Valves : 2.300 Int / 1.880 Exh

© 2019 RPMWare Inc. All Rights Reserved.
Terms of Service