Motorshop Raw Iron Cylinder Head Set for Harley UL 74-80 Inch (1937–1948)

Raw iron front and rear cylinder heads for Harley UL 74-inch and 80-inch engines, cast after the OEM Cast Ironheads and featuring WR-shaped combustion chambers for efficient combustion and authentic vintage styling.

The head set accepts 18mm spark plugs and Ironhead-length head bolts, enabling versatile compatibility with classic Harley models from 1937 to 1948. It is machined for brass primer cups to ensure proper fitment and sealing.

• WR-shaped combustion chambers for improved combustion efficiency
• Accepts 18mm spark plugs and Ironhead-length head bolts
• Machined for brass primer cups to ensure proper fitment and sealing
• Uses 1-3/8 inch large hex spark plugs for easier installation and maintenance
• Constructed in Taiwan
• Recommended pairing: V-Twin copper head gaskets for better sealing and heat transfer
• Suggested accessories: #49-0009 Brass Head Primer Cups and #49-0878 18mm Doering Spark Plug Set
• Fitment: Harley Davidson UL models from 1937 through 1948

Raw iron front and rear head set is for 74 inch and 80 inch models. This set is casted after the OE Cast Ironheads which features the squish inchWR inch combustion chamber.

Upgrade your vintage Harley Davidson UL engine with the Motorshop Raw Iron Cylinder Head Set, designed to deliver reliable performance and authentic style. These heads accept 18mm spark plugs and Ironhead length head bolts, making them compatible with a range of classic Harley models from 1937 to 1946. Crafted with precision, the heads are machined for brass primer cups, ensuring proper fitment and sealing. For optimal performance, it is recommended to use V-Twin copper head gaskets with this set, enhancing gasket sealing and heat transfer efficiency. The heads feature WR shape combustion chambers, which promote efficient combustion and power output. The large 1-3/8 inch hex allows for easy installation and maintenance of the spark plugs, simplifying your engine rebuild or upgrade process.

Features:

• Accepts 18mm spark plugs and Ironhead length head bolts for versatile compatibility

• Machined for brass primer cups to ensure proper fitment and sealing

• s WR shape combustion chambers for improved combustion efficiency

• Uses 1-3/8 inch large hex spark plugs for easier installation and maintenance

• Suggested to use with #49-0009 Brass Head Primer Cups and #49-0878 18mm Doering Spark Plug Set for optimal performance

• Constructed in Taiwan for quality manufacturing

• Compatible with Harley Davidson UL models from 1937 through 1946

Fitment:
Harley Davidson UL 1937
Harley Davidson UL 1938
Harley Davidson UL 1939
Harley Davidson UL 1940
Harley Davidson UL 1941
Harley Davidson UL 1942
Harley Davidson UL 1943
Harley Davidson UL 1944
Harley Davidson UL 1945
Harley Davidson UL 1946
Harley Davidson UL 1947
Harley Davidson UL 1948