New "Iron" style ALUMINUM HEAD Set for all 1937 - 1948 UL & ULH motors (Also fits the one year only 1936 VL motor with 9 Head Bolts) 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 use Iron Head Bolt Washers or our Special Washers(no room for the big aluminum head Washers)
New "Iron" style ALUMINUM HEAD Set for all 1937 - 1948 UL & ULH motors (Also fits the one year only 1936 VL motor with 9 Head Bolts) 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 use Iron Head Bolt Washers or our Special Washers(no room for the big aluminum head Washers)
