JAGG Oil Filter Adapter w/Thermostat - W/Front Mount Spin ON Filter — Harley-Davidson (1984-1998)

JAGG oil filter adapter with integrated thermostatic bypass valve, designed to mount between the oil filter and block to provide easy access for oil cooler plumbing. Flows oil through the filter first, then routes to the cooler only after the engine reaches operating temperature for faster warmup.

Features

• Built-in thermostatic oil bypass valve
• Flows through filter first for better flow
• Pro Line swivel fittings included
• Easy oil cooler installation access

Specifications

• Brand: JAGG
• Manufacturer Part #: 4550
• Length: 6 in
• Width: 5 in
• Height: 4 in
• Weight: 1.2 lbs

Fitment

Fits Big-Twin carbureted EVO models with front-mount spin-on oil filters, XL Sportsters, and Buells. Required for oil cooler installation on 2004-up Sportsters.

Frequently Asked Questions

Do I need this adapter to install an oil cooler?

Yes — this adapter is required on 2004-up Sportsters for oil cooler installation. It provides the plumbing path from the filter to the cooler.

What does the thermostatic bypass valve do?

It allows oil to bypass the cooler until the engine reaches operating temperature, speeding up warmup times and protecting a cold engine.

Will oil flow through the filter first?

Yes — oil flows through the filter before reaching the cooler, ensuring better filtration and flow.

What fittings are included?

Pro Line swivel fittings are included for easy oil line connections to your cooler.