New "Iron" style ALUMINUM HEAD Set for all 1937 - 1948 UL & ULH motor Premium grade cast aluminum HEADS are made using newest technology and machining HEADS incorporate KR-model look-a-like chamber for best performance of your old flathead Compression is around 6.5:1 if fitted to 74" motor, and 6.9:1 on 80" motors. Dynotesting shows power went up 18% and torque 13% over stock heads HEADS will take 1/2" valve lift, and there is still material left for pop-up piston modifications Run as cast or paint black for original 1930s - 1940s look (as shown) HEADS come machined for 14mm Spark Plugs and a set of 18 Special Head Bolt Washers
New "Iron" style ALUMINUM HEAD Set for all 1937 - 1948 UL & ULH motor Premium grade cast aluminum HEADS are made using newest technology and machining HEADS incorporate KR-model look-a-like chamber for best performance of your old flathead Compression is around 6.5:1 if fitted to 74" motor, and 6.9:1 on 80" motors. Dynotesting shows power went up 18% and torque 13% over stock heads HEADS will take 1/2" valve lift, and there is still material left for pop-up piston modifications Run as cast or paint black for original 1930s - 1940s look (as shown) HEADS come machined for 14mm Spark Plugs and a set of 18 Special Head Bolt Washers
