Harddrive Billet Oil Pump - BIG Twin 1973-1991 — Harley-Davidson Super Glide, Electra Glide, Electra Glide Classic (1973-1992)

Harddrive billet oil pump for Big Twin engines, cast aluminum construction CNC machined and polished to a high-gloss finish. Upgrades 1973-1980 engines to the 1981-up oiling system that splits bottom and top end supply, increasing oil pressure to hydraulic lifters and top end.

Features

• Cast aluminum, CNC machined and polished finish
• Splits bottom and top end oil supply for increased hydraulic lifter pressure
• Routes surplus oil to main passage to avoid unnecessary filtering
• Includes gaskets, drive shaft with keys and snap ring, check ball and relief valve assemblies
• Optional oil supply fitting locations for custom routing

Specifications

• Brand: Harddrive
• Manufacturer Part #: 301495
• UPC: 191361165443
• Length: 7.65 in
• Width: 7.6 in
• Height: 3.6 in
• Weight: 2.84 lbs
• Country of Origin: China (Taiwan)

Fitment

Fits Harley-Davidson Big Twin engines 1973 through 1991. Note: Cases manufactured 1970-1980 may require drilling for proper fitment.

Frequently Asked Questions

Will this fit my 1973-1980 Big Twin?

Yes, but cases from 1970-1980 may require drilling. Check your engine case before installation.

What's included in the box?

Oil pump assembly, gaskets, drive shaft with keys and snap ring, mounting hardware, check ball, and pressure relief valve assemblies.

Does this upgrade my oiling system?

Yes — this pump splits bottom and top end oil supply like 1981-up engines, increasing pressure to hydraulic lifters and the top end.

Can I customize the oil routing?

Yes — the pump offers optional oil supply fitting locations. For oil tanks below the transmission, use stock locations for best lubrication.

Will this require modifications to my engine?

Most installations bolt in, but 1970-1980 cases may need drilling — verify your case before ordering.