We highly recommend our Exterminator Kits for a complete performance package- kit components are matched to your machine and riding elevation for optimum power and performance, just select the checkbox to add the Adjustable Pipe as an option to the kit of your choice.

Speedwerx Fat Daddy Adjustable Pipe Kit

The Speedwerx Fat Daddy Adjustable Pipe allows you adjust your exhaust pipe to better suit your riding conditions and/or elevation.

The pipe comes with two removable stinger inserts one for 0-5000’ riding and one for 5000’ + riding. The advantage to this is that if you ride in both low and high elevation ranges you will not need to have two pipes to have the best of both worlds. You can change from ride to ride or even on that same ride to ensure you are getting maximum horsepower and performance. The stingers swap out with just a few exhaust springs. Saves 4 lbs. and you can still use your stock muffler for stock-like sound, or use one of our lightweight mufflers for better sound and additional weight loss. 

Fat Daddy Adjustable Pipe Kits Include:
Ceramic Coated Fat Daddy Single Pipe, Two Ceramic Coated Stinger Inserts, a Ceramic Coated Y-Pipe, and all necessary mounting hardware.

No chassis modifications needed. Pipe requires premium 91+ octane fuel and a DynoJet Power Commander V fuel controller or Speedwerx ECU Reflash.

2020 Arctic Cat 800 C-TEC 2 Exhaust Pipes Tested at DynoTech

Recently, DynoTech Research in Batavia, NY conducted an exhaust pipe comparison on a 2020 ZR 8000. A completely stock machine with 2000 miles was hooked to the SuperFlow engine dyno to run the stock exhaust against five aftermarket pipe options including the Speedwerx Pipe and Y-Pipe Kit. When all was said and done, the Speedwerx pipe topped them all with 9.8hp better than stock and 2.8 to 6.9hp better than the competitor’s exhausts! This also backs up a previous test at DynoTech that showed a 9.9hp gain on a 2018 model.

Here’s a summary of the peak power and torque numbers but for all the details on the dyno session, check out the subscriber pages at dynotechreasearch.com.

• Stock - 153.6 hp @ 7900 - 102.6 ft-lbs. @ 7800
• Pipe 1 - 156.5 hp @ 7800 - 105.8 ft-lbs @ 7750
• Pipe 2 - 159.6 hp @ 7800 – 108.1 ft-lbs @ 7600
• Pipe 3 - 160.4 hp @ 7900 - 107.2 ft-lbs. @ 7800
• Pipe 4 - 160.6 hp @ 7950 - 106.8 ft-lbs @ 7850
• Speedwerx - 163.4 hp @ 7950 - 108.6 ft-lbs. @ 7850
• This also backs up a previous test at DynoTech that showed a 9.9hp gain on a 2018 model.

The pipe is just one part of the performance equation though. We highly recommend our Exterminator Kits to get a complete bolt-on performance package developed on our dyno and thoroughly field tested to meet our strict performance standards. The Stage 2 Exterminator Kits are the ultimate choice for those wanting maximum power and performance in a naturally aspirated, stock displacement bolt-on package with pull and go reliability on pump gas! The Stage 2 consists of our Fat Daddy Single Pipe and Y-Pipe, ECU Flash, Stealth Head Mod, VForce Reeds (2018-2019 only), Hypershift Clutch Kit, High Flow Intake Vents, Aluminum Panel Vents, and Exhaust Valve Cable Gauge. The Stage 2 delivers 12-13hp more at the peak, and 16-17hp more in the midrange, and you'll also save 13.9 to 18lbs when combined with one of our lightweight mufflers! 

Not only was our Fat Daddy Pipe and Y-Pipe the clear winner among the those tested by DynoTech, it's 4.5lbs lighter than stock too. We also have a high elevation specific pipe for better performance at altitude, or an optional adjustable pipe with interchangeable stingers if you regularly switch between high and low elevation. Now available for all 2018-2021 models, our ECU Flashes that are developed in-house change the fuel and timing parameters to ensure you’re getting maximum power and excellent throttle response with pull and go reliability on pump gas. The Stealth Head Mod has our interchangable billet domes with a special chamber and cooling design to reduce the chances of triggering the knock sensor to keep you at peak power all the time, and it also enables those riding at higher elevations to safely bump up the compression on premium pump fuel as well. We tested numerous reed designs in 2017, and settled on a special design from VForce that proved to be better than all others on the 2018-2019 engine, while the 2020-2021 kits work well with the stock reeds due to the different OEM cylinder and injection design. Our Hypershift Clutch Kits keep the revs in the sweet spot to get all that added power to the ground when pipe temps and RPM’s climb on a long pull across the lake or up the mountain. The Intake Vents deliver more cool air to make more power, and the Panel Vents help keep your belt and clutch temps in check. The Exhaust Valve Gauge is an easy way to check cable lengths to ensure they are in spec to eliminate any potential running issues, something that's often overlooked on these machines. Add our standard Lightweight Muffler that's 9.4lbs lighter or the L2 Series that sheds 13.5lbs, and you'll save 13.9 to 18 pounds overall!

We also offer a Stage 1 Exterminator Kit for a little easier installation at a lower price point. It does not include the Stealth Head or VForce Reeds so the power gains aren't as strong in the midrange, but it's noticably better than stock with the same 12-13hp peak power gain. If you find yourself wanting more, you can always upgrade to the Stage 2 spec down the road as well. 

ABOUT OUR EXHAUSTS:
All of our Fat Daddy single pipes undergo countless hours of testing and development combined with hours of design and fitting. We have taken the time necessary to produce the best single pipes for your machines. Here are some of the key benefits to using our single pipes:

STRAIGHT-UP USA HORSEPOWER
Every pipe is designed, DYNO tested and then field tested to produce real, accurate and reliable horsepower gains. Our pipes are not built for one run across the lake or on the trail. Our pipes are built to last and our pipes work!

CERAMIC COATING
All of our single pipes come with a long lasting finish that offers a great look while also acting as a thermal barrier to keep heat inside the pipe for optimum performance.
 
LIGHTWEIGHT
All of our single pipes are lighter than the stock system.  You can expect an average weight savings of about 5 lbs.

GREAT FIT
All single pipes are designed to run into the stock muffler for simple installation.

QUIET
You can expect stock sound levels while using the stock muffler.

DETAILED INSTRUCTIONS
Each single pipe comes complete with a full instruction/set-up sheet which includes jetting specifications if needed, clutch set-up suggestions, as well as full installation instructions.

Our Fat Daddy Adjustable Pipe Kit comes with interchangeable stinger inserts which allow you to easily tune your pipe for different elevations.
9.8hp gain as tested at DynoTech Research!