Billet Proof Designs

Oil Pressure Gauge Adaptor - Chrome - For 1936-1969 Harley Davidson Big Twin Case - 1/8" NPT Fitting - Made In The USA

Chrome Bayonet CAM Style Vented Gas Cap for 1936-1973 Harley Davidson Models - Replaces HD 61103-36

Billet Proof Designs® Finned Oil Tank / Oil Bag with cap - Textured Black Aluminum - Made in USA

Billet Proof® Brass Gas Cap w/ Aluminum Stepped Flanged Tophat Bung

Vented or Non-Vented Gas Cap with Steel Stepped Flanged "Tophat" Bung - Brass

Billet Proof® Sight Glass Style External Fuel Gauge with Aluminum 3/4” NPT Stepped Flanged Tophat Bung

Billet Proof® Sight Glass External Fuel Gauge with Bung - Nickel Plated Steel Gauge, 3/4” NPT Steel Stepped Flanged Tophat Bung

Billet Proof® Hose Style Fuel Gauge for Gas Tank with Stepped Flanged "Tophat" Bung - Clear Hose, Steel Bung

Billet Proof® Hose Style External Fuel Gauge for Gas Tank - Yellow Tygon Fuel Hose w/ Flush Mount Steel Bung and Brass Hose Barbs

Billet Proof® Battery Tray for Antigravity Batteries® Small Case 4 Cell (AG-401 and XPS SC-1) Lithium Battery - Textured Black / Contrast Cut Logo - Made in USA

3/4" NPT, Female, Flanged Aluminum Bung - "Tophat" Style

Tophat Stepped Bung with Flange – 1/8” NPT Tapered Thread – Great for Mounting Fuel/Oil Valves, Elbows and Outlets - Mild Steel - Made In The USA