• 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, 100 steel retainers, 100 locks, 7/16" studs, 3/8" guide plates, bowls blended, intake ports matched, and competition multi-angle valve job.
• 45 H.P. over out of box, completely CNC ported

BB Chevy BB-2 Plus, 312 Intake, 119cc Chamber, 427-509 Cu.In., 2.250/1.880" Intake/Exhaust, (.700" max lift)

BB Chevy BB-2 Xtra, 365 Intake, 119cc Chamber, 540-582 Cu.In., 2.300/1.880" Intake/Exhaust, (.700" max lift)

BB Chevy BB-2 Xtra 1.625, 365 Intake, 119cc Chamber, 509-565 Cu.In., 2.300/1.880" Intake/Exhaust, (.800" max lift)

BB Chevy BB-2 Xtra CNC Ported, flows over 405 cfm, 405+ Intake, 119cc Chamber, 540-632 Cu.In., 2.300/1.880" Intake/Exhaust, (.800" max lift) *Add 45 H.P. over out of box, completely CNC ported

BB Chevy Big Duke PD1802, Intake flows over 480 cfm @.800" lift w/4.600" bore, 540-632 Cu.In., 2.400/1.900" Intake/Exhaust,