Ultracool Side Mount Naked Oil Cooler

Ultracool Side Mount Naked oil cooler drops motorcycle oil temps up to 50 degrees on Harley Touring, Softail, and Dyna models. Dual thermostat-controlled fans activate at 210°F and maintain optimal oil temperature between 200–230°F, protecting the engine during heat soak and extended riding.

Features

• Dual-pass aluminum heat exchanger with turbulators
• Thermostat-controlled dual fans (220 CFM) kick in at 210°F, shut off at 185°F
• Black nylon-coated stainless steel braided oil lines with AN6 fittings
• Waterproof IP68 sealed fans and connectors
• LED indicator light shows when fans are running
• Plug-and-play wiring harness connects to battery under seat
• Oil line fitting wrench and detailed instructions included

Specifications

• Brand: Ultracool
• Manufacturer Part #: SMT-4
• Style: Naked side mount (no covers)
• Frame Compatibility: 1 1/4" or 1 1/8" frames (Touring/FXR)
• Dimensions: 11 in L × 9 in W × 6 in H
• Weight: 8 lbs

Fitment

Fits Harley-Davidson Touring 1984–2016 (including 2014–2016 Twin Cooled models), Softail 1985–2017, and Dyna 1990+. Designed for 1 1/4" and 1 1/8" frame tubes typical of Touring and FXR chassis.

Frequently Asked Questions

What temperature does the fan turn on?

The thermostat switches on the dual fans when oil reaches 210°F and turns them off once oil cools to 185°F.

How much can this cooler lower my oil temperature?

Up to 50 degrees, maintaining optimal oil temperature between 200–230°F during extended riding and heat soak conditions.

Is installation difficult?

Plug-and-play wiring harness connects directly to the battery under the seat. Oil lines connect with included AN6 fittings and the special fitting wrench. Detailed instructions and wrench are included.

Will water enter the connectors if I ride in the rain?

No — all electrical connectors and fan seals are rated IP68 waterproof and designed for wet-weather riding.

Does this fit my 2017+ Softail?

This cooler is listed for Softail 1985–2017. Verify your exact model year and frame tube diameter (1 1/4" or 1 1/8") before ordering to ensure fitment.