Aluminum 45" WLDR cylinder head set

Aluminum 45" WLDR cylinder head set

1:6 High Compression. Will fit all WL models. To maximize performance heads should be combined with + 1/8 large diameter intake valves (971199) and WLDR camshaft set (971250). Replaces OEM 16681-39, 16683-39, 9-39 and 10-39.

Fits: > 37-73 45" WL Flatheads; OEM replacement for 37-41 WLDR racer (NU)