40x35,5 Street Pro Heads - each

Street Pro Heads Are Available In 40Mm X 35.5Mm Valves With 85Mm Bore. They Come With Single Hi-Rev Valve Springs And Stainless Steel Valves. Street Pro Heads Are Over 50% Stronger Than Stock Heads, Have Larger Than Stock Ports Cast Right In, And Have 3/4 Reach Spark Plug Holes. Sold Each. Dual Valve Springs Are Available.