S&S, ‚Flathead Power‘ cylinder head, rear

Beschreibung

Aluminum rear head only. Fits all 37-48 74" side valve engines when converted to 80" (larger bore) and all stock 80" engines. Aluminum heads were stock on 40-41 80" engines, and optional for others. Head has 126cc capacity, for stock compression. Head can be milled .070", which makes it equivalent to stock high compression head. Note: Spark plug hole is 18mm threaded so stock style large spark plugs can be used. Note: See 531672 for front head only and 531671 for front & rear head set.