Dyno Testing
On Site
in Great Falls

Repeatable, Accurate Dyno Runs,
In house, On site.
Schedule your run today.

LEARN MORE ABOUT OUR DYNO

Welcome to
Dooley's Diesel
We Diagnose, Upgrade,
and rebuild
Gas & Deisel Trucks.

You have a Truck.
We should be the ones who fix it.

Questions about your truck?

S.O.A Pistons
Speed of Air
OE & Aftermarket
Parts & Accessories

Clean Engine Technology
• Reduce Fuel Consumption
• Reduce Emissions
• Increased Horsepower

LEARN MORE ABOUT SOA

All New
Dooley's Diesel
Tees, Hoodies
& Apparel
In the Shop!

CLICK HERE
TO SEE OUR NEW INVENTORY!

SHOP NOW

Premium
Primrose
Additives

Authorized Dealer
Primrose Additives

Buy Online >

ASE Master
Certified
20+ years

Having the right tools,
is only good if you know how to use them.
Veteran Owned and Operated

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Quality

Tech

Easy

Fast

Services

Banks Power
K&N Filters
Superchips
Bully Dog

Our Vendors

We are a direct distributor for these manufacturers.