The BB-2 and BB-2 Plus heads work well with a heavy car and smaller engine (427-509 cu in). The BB-2 has a 305 cc intake port and flows 320 cfm; the BB-2 Plus has a 312 cc intake port and flows over 340 cfm with only the bowls blended and the intake ports matched. Both heads may be purchased angle milled to 110 cc. The combustion chambers are 119 cc and are properly shaped for use with either methanol or gasoline, preventing detonation.

• Made in the U.S.A.
• Made of A-356 virgin aluminum
• .600 raised exhaust ports
• Phosphorous Bronze valve guides
• Raised valve cover rails
• Accepts all standard pistons, intake manifolds, rockers, and exhaust headers
• Ends are drilled for accessories
• Complete assemblies include; stainless steel valves, 1.550" roller valve springs, 10° steel retainers, 10° locks, 7/16" studs, 3/8" guide plates, bowls blended, intake ports matched, and competition multi-angle valve job.

• The CNC ported BB-2 Plus castings are CNC ported to a mirror finish and flow within 1% of each other.