GOS Performance

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GOS Performance Located in the heart of the Rocky Mountains, is your # 1 source for Cummins conversions and Allison transmission conversions. Unparalleled support, period.

Located in the heart of the Rocky Mountains, we are your # 1 source for Ford Cummins conversions and Allison transmission conversions! We manufacture and sell the best conversion parts in the industry, with no middle man involved. We are your direct source for Cummins conversion parts. Here at GOS you can rest assured that the product you purchase is the best money can buy. Customer service is our #1 priority before, during, and after the sale, which is why our technical support team is second-to-none. We have been performing Cummins swaps since 2001. What does this mean for our customers? Need help with torque specs? We have the answers. Need help with proper install procedures? It doesn't matter if you are a do it yourselfer, a seasoned vet or a service repair shop, if you can't find the part or information you need? Please call us at 1-800-620-4467, or e-mail us at [email protected]

Fresh rubber meeting high-end metal. We're mounting up this clean ICON Alloys wheel wrapped in rugged all-terrain rubber...
10/19/2026

Fresh rubber meeting high-end metal. We're mounting up this clean ICON Alloys wheel wrapped in rugged all-terrain rubber. Precision balancing ensures zero vibration at highway speeds while giving your truck the aggressive off-road look it deserves.

Style meets performance—every time.

Fully assembled, plumbed, and ready to drop in. High-pressure fuel lines, upgraded filtration, and a fresh coat—this Cu...
10/16/2026

Fully assembled, plumbed, and ready to drop in. High-pressure fuel lines, upgraded filtration, and a fresh coat—this Cummins setup is prepped to handle serious torque and heavy workloads. When GOS Performance builds an engine, every detail from the block to the harness is set up for peak efficiency and longevity.

Nothing beats the sight of fresh iron heading under the hood.

Golden hour hits different when your truck looks this good. This Ford Super Duty is fully dialed in with custom lighting...
10/12/2026

Golden hour hits different when your truck looks this good. This Ford Super Duty is fully dialed in with custom lighting, upgraded stance, and the power under the hood to handle whatever lies ahead. Built for the open road, heavy hauls, and scenic backcountry stops.

Where is your rig taking you this weekend?

The details underneath make all the difference on the road. 🔧 Our tech is hard at work dialing in this front suspension ...
10/09/2026

The details underneath make all the difference on the road. 🔧 Our tech is hard at work dialing in this front suspension coil springs and steering linkage upgrade. Proper installation is critical to keeping your steering tight, your ride smooth, and your components lasting for the long haul.

We don't cut corners—we build it to perform.

A clean look with the stance to back it up. This Chevy Silverado Z71 came through the shop for a fresh suspension lift a...
10/05/2026

A clean look with the stance to back it up. This Chevy Silverado Z71 came through the shop for a fresh suspension lift and wheel setup to give it the perfect balance of aggressive styling and capability. Clean lines, proper clearance, and zero compromises on ride quality.

How’s your truck looking for the weekend?

Clean, precise, and ready to make serious power. When you build with GOS Performance, every bolt, line, and clearance is...
10/02/2026

Clean, precise, and ready to make serious power. When you build with GOS Performance, every bolt, line, and clearance is double-checked for perfection.

Ready to give your truck the powerplant it deserves?

Professional installation ensures improved handling, better off-road clearance, and the strength to tackle anything. Tru...
09/28/2026

Professional installation ensures improved handling, better off-road clearance, and the strength to tackle anything. Trust GOS Performance to get your truck's stance and strength right.

The mark of performance, spotted in its natural habitat. 🐊 This hard-working red truck wears the GOS Performance decal w...
09/25/2026

The mark of performance, spotted in its natural habitat. 🐊 This hard-working red truck wears the GOS Performance decal with pride, right next to the Duramax Diesel badge. Real trucks, real mud, and the real-world results that come with GOS expertise.

When you see the GOS Gator, you know serious performance is under the hood. What kind of power drives you?

Preventing head gasket failures under high boost is essential. Using ARP hardware guarantees a rock-solid foundation. We...
09/21/2026

Preventing head gasket failures under high boost is essential. Using ARP hardware guarantees a rock-solid foundation. We build 'em tough, we build 'em to last, and we build 'em GOS.

Behind every high-performance truck is a workspace where preparation meets power. Is your truck ready for the next level...
09/18/2026

Behind every high-performance truck is a workspace where preparation meets power.

Is your truck ready for the next level?

Address

306 S 12th Street Unit B
Livingston, MT
59047

Opening Hours

Monday 8am - 5pm
Tuesday 8am - 5pm
Wednesday 8am - 5pm
Thursday 8am - 5pm
Friday 8am - 5pm

Telephone

+14062225440

Website

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