Billet Proof Designs® Finned Oil Tank / Oil Bag - Contrast Cut Black Aluminum - Made In the USA

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You can’t beat this level of quality and durability for the price!

Designed to work with Harley Davidsons but can easily be made to work with Triumphs as well many other bikes.

 • Keep your oil temps down! This oil bag has fins machined into the end caps to maximize heat dissipation.

 • Oversized 1/4" NPT fittings allow for much greater flow than other tanks.

 • The entire tank is powder coated in a durable textured black finish with contrast ground fins.

 • The End Caps are CNC machined from 6061 Aluminum and the body of the tank is a 6063 Aluminum extrusion.

 • 3 Quart capacity.

 • Mounts:  4-1/2” centers (3/8” 16 thread)

 • Cap:  1.25 x 12 thread aluminum

 • Fittings (4):  1/4“ NPT – Feed to pump, Return from pump, Crankcase vent and Drain.


Choose from many of our custom gas caps!



Length                        =             11-1/2"

Width                         =             6-5/8"

Height                        =             4-1/4”



Oil Bag

Aluminum Cap



Most Harley Davidson Motorcycles