Stedman Motorsports

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Stedman Motorsports If you are new to the exciting world of powersports you can take comfort in knowing that Stedman Motorsports is here to help with you high performance... CST.

About Stedman Motorsports / Monster Motorsports / Monster Turbos
In the Beginning:
We started out as a small storefront and mail order business in Grand Rapids, Michigan, the heart of the Midwest snowmobile country. Today, now located in Moulton, Alabama, we can fulfill your order from our 10,000 square foot service center. As well we are a full service shop with a in house dyno for all your Tuning Needs. The Growing Years: 1990-2013-2022

We have full-line of catalogs servicing Harley-Davidson®, Off Road (dirt bike and ATV), Snowmobile, Metric Motorcycle and Personal Watercraft Racing enthusiasts. Each catalog features a complete line of apparel, parts and accessories from hundreds of manufacturers worldwide. Stedman Motorsports is regularly keeping up-to-date merchandise and is able to offer a full range of product(s). Our staff consists of knowledgeable sales operators, customer service and technical support. Each and every staff person is ready to help make your shopping experience pleasant. Our customer service hours are Tuesday - Friday 10 a.m. to 5 p.m. CST; Saturday 10 a.m. to 2:00 p.m. Not only can you order by telephone 10am to 5pm Central, 4 days a week; Stedman Motorsports Monster Motorsports has made shopping via the Internet an easy task for all customers. The Technical Support staff is made of personnel that are interested and know all about power sports. They have the resources available to help you answer questions you need to know. Technical Support can assist you. Technical Support is available T-F 10am-5pm
We Offer Turbo Systems for Today's Sports Bikes, Custom Systems & D.I.Y Products for the Person that wants to build their own. We Are The Number One Manufacturer of Sportbike Turbo Systems, Proudly Built in the USA !

10/12/2026

🔥 CRUISERS, SPORT BIKES & HARLEYS—LET’S GET YOUR BIKE DIALED IN! 🔥 256-974-4099
I’ve got openings for motorcycle dyno tuning and ECU flashing at Stedman Motorsports! With 35+ years of hands-on experience, I focus on more than a horsepower number—it’s about strong power, crisp throttle response, and a bike that runs right.
Suzuki • Yamaha • Honda • BMW • Kawasaki • Harley-Davidson
From stock cruisers to built sport bikes and turbo setups, let’s get your combination working the way it should. Get your bike on the schedule and let’s put it on the rollers! 💪
📍 Moulton, Alabama | MonsterTurbos.com
Stedman Motorsports — Where Horsepower Happens.

If you are new to the exciting world of powersports you can take comfort in knowing that Stedman Motorsports is here to help with you high performance...

🚨 FABRICATORS—STOP SCROLLING! 🚨Building a turbo setup? Mock it up before you commit! 💪Our wastegate mock-ups for Turbosm...
10/12/2026

🚨 FABRICATORS—STOP SCROLLING! 🚨
Building a turbo setup? Mock it up before you commit! đź’Ş
Our wastegate mock-ups for Turbosmart applications help you dial in placement, check clearances, and plan your piping—without putting your expensive wastegate in the middle of the fabrication mess.
40 mm • 45 mm • THE BIG BOY!
🔥 We’ll be adding these to MonsterTurbos.com soon—stay tuned!
Less guesswork. Less rework. More building.
Monster Turbos — Where Horsepower Happens.
For fabrication mock-up only—not functioning wastegates.

10/12/2026

Building a turbo setup? Mock it up before you commit! đź’Ş

Get a first look at our wastegate mock-ups for Turbosmart applications: 40 mm, 45 mm, and THE BIG BOY!

Plan placement. Check clearances. Work out your piping.

🔥 Coming soon to MonsterTurbos.com—stay tuned for the drop!

Less guesswork. Less rework. More building.

For fabrication mock-up only—not functioning wastegates

This is the Protype model of the Medusa GSXR1000 turbo header that we will offer.
10/10/2026

This is the Protype model of the Medusa GSXR1000 turbo header that we will offer.

316SS full 4-1 Merge turbo headers… We have been working on the project for wile now, doing R&D and now fished the fitme...
10/09/2026

316SS full 4-1 Merge turbo headers…

We have been working on the project for wile now, doing R&D and now fished the fitment of 4 different turbos combos for Suzuki models, 05-08 GSXR 1000 and Hayabusa and now we are working on Gen1 ZX10 more info coming soon.

Just an FYI for anyone running a compensateing standalone ECU on a turbo/nitrous/all motor bikes : Most setups rely on a...
09/19/2026

Just an FYI for anyone running a compensateing standalone ECU on a turbo/nitrous/all motor bikes :

Most setups rely on a single O2 sensor in the collector, meaning the ECU target-tunes based on a 4-cylinder average. If you are under heavy boost-spraying the house down and one injector goes bad or maxes out, the ECU won't catch it. It will only see the total average leaning out on the O2 sensor. To compensate and hit your target air/fuel ratio, the ECU will start cramming massive amounts of extra fuel into the other three healthy cylinders. While the overall average might look perfectly fine on your logger or dash, that single cylinder with the bad injector is running critically lean under full boost. It takes less than a second of a hard pull for a cylinder running lean under boost to melt a piston, torch a plug, or completely blow the motor apart. (Learn to Read Your Spark Plugs)

Important Announcement !from Stedman Motorsports / Monster TurbosEffective immediately, we will no longer accept general...
09/09/2026

Important Announcement !

from Stedman Motorsports / Monster Turbos

Effective immediately, we will no longer accept general motorcycle service or repair work.

Moving forward, we will focus exclusively on custom fabrication and manufacturing, Monster Turbos products and turbo systems, and motorcycle dyno tuning.

If your motorcycle is currently at our shop, we will contact you personally to discuss its status and determine the best way to move forward.

We aren’t closing—we’re changing direction and moving into the next chapter.

Where Horsepower Happens

This photo is just a basic layout ideal how your fuel should look when turbo charging your motorcycle.
09/09/2026

This photo is just a basic layout ideal how your fuel should look when turbo charging your motorcycle.

Major Changes coming Next Week, also if you have one of our Cell Phones numbers delete it as we are no longer offering t...
09/04/2026

Major Changes coming Next Week, also if you have one of our Cell Phones numbers delete it as we are no longer offering the cell phone option of commutation...

Address

14590 Court St
Moulton, AL
35650

Opening Hours

Tuesday 10am - 5pm
Wednesday 10am - 5pm
Thursday 10am - 5pm
Friday 10am - 5pm

Telephone

(256) 974-4099

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