Patriot Performance 320cc BBC

Click Image For Full View

Patriot Performance 320cc BBC Freedom Series Heads Assembled #2211 Patriot Freedom Series heads have started a revolution in the performance world. They have custom designed a head to meet the demands of the BBC world, while keeping the quality high and the price reasonable. Patriot BBC heads come as cast with a 320cc intake runner, US made bronze guides, and 5 angle valve job. Chevy High Performance used these to build their 675 hp 496 in their Jan. 2008 issue. These heads come standard with a 119cc chamber, assembled in Patriot facility with 21-4N stainless 2.250" / 1.880" valves, .600" hydraulic roller springs, steel retainers, 7/16" studs, guide plates, and viton seals. Sold as Pair. Technical Specs: Combustion Chamber: 119cc Intake Runner: 320cc Exhaust Runner: cc Intake Valve: 2.250" Exhaust Valve: 1.880" Max. Valve Spring Lift: 0.600" Spring Pressure Closed: 135 lbs. @ 2.000" Spring Pressure Open: 375 lbs @ 1.400" Retainer Material: Steel Valve Seal Material: Viton Valve Guide Material: Manganese Bronze Valve Job: 5-angle Cost: $1,395

Promar Reserves the right to change manufacturers and specs without notice. HP and TQ ratings are based on actual results on a engine dyno with open headers in controlled environment tuned for maximum performance.