Patriots Freedom Series Small Block Ford Heads have started a revolution in the performance world. Patriot has custom designed a head to meet the needs of the SBF world, while keeping the quality high and the price reasonable. The SBF heads come as cast with a 185cc intake runner, US made bronze guides, and our 5 angle valve job. Patriot has seen these heads add over 75 hp over a set of ported "E7" 5.0 heads. Sold as a pair fully assembled or Bare - drilled with 1/2"head bolts