Main >> Valves >> Manley >> BB Chevy Manley Valves BB Chevy (scroll down and click on blue links for all BBC Valves)   BBC STREET FLO VALVES WITH 3/8" STEMS Superior to all mid ranged priced valves XH-424 Stainless Exhaust Materials NK-841 Stainless Intake Material Chrome Stems and Hard Tips Swirl Polished and Fully Machined Improved Flow with "Pro Flo" Underhead   BBC RACE FLO VALVES STOCK 3/8" STEM DIAMETER Unsurpassed by the Competition's Best XH-426 Stainless Exhaust Materials NK-842 Stainless Intake Material Chrome Stems and Hard Tips Swirl Polished and Fully Machined   BBC RACE MASTER VALVES STOCK 3/8" STEM DIAMETER XH-426 Stainless Exhaust Materials NK-842 Stainless Intake Material Chrome Stems and Hard Tips Swirl Polished and Fully Machined   BBC RACE MASTER VALVES STOCK 11/32" STEM DIAMETER Unsurpassed by the Competition's Best XH-426 Stainless Exhaust Materials NK-842 Stainless Intake Material Chrome Stems and Hard Tips Swirl Polished and Fully Machined 11/32" Stems for Improved Flow, Lighter Weight   BBC SEVERE DUTYŽ VALVES WITH 3/8" & 5/16" STEMS   BBC SEVERE DUTY "PRO FLO" VALVES WITH Stock 3/8" STEMS   BBC SEVERE DUTYŽ VALVES WITH 11/32" STEMS  DART BB PRO 1 and 320/360 HEADS - SEVERE DUTY 11/32" STEMS   BBC BRODIX BB-4/ SAR EDELBROCK VICTOR & CHEVROLET #12363425 HEADS SEVERE DUTYŽ VALVES W/ 11/32"STEM DIAMETERS  BBC PONTIAC "PRO STOCK', DART "BIG CHIEF" - SEVERE DUTY VALVES   BBC EXTREME DUTY & MARINE VALVES STOCK 3/8" STEM DIAMETERS Extreme Duty and Marine XH-430 (Inconel) Exhaust Material NK-844 Intake Material Chrome Stems and Hard Tips Swirl Polished and Fully Machined   BBC EXTREME DUTY & MARINE VALVES STOCK 11/32" STEM DIAMETERS Extreme Duty and Marine XH-430 (Inconel) Exhaust Material Smaller Stem Diameter Greater Flow and Less Weight Chrome Stems and Hard Tips Swirl Polished and Fully Machined