Stage 3 - Workhorse W22 2001-2003 Performance Package

Stage 3  -  Workhorse W22 2001-2003 Performance Package


Order Shipment Notice: 

Most orders are shipped within 24 hours from the order date. Orders placed on the weekend or after cutoff on Friday, and orders placed on select holidays are processed on the next business day. Please see our shipping terms for more information.

Stage 3 Description:
Ultra RV Product’s Stage 3 Performance Kit takes the benefits of Stage 1 & 2 and tops it off with beautiful stainless steel Banks TorqueTube headers. Constructed of heavy-wall, 400-series stainless steel, TorqueTubes have 5/8 inch-thick flanges that are welded on both sides and then machined perfectly flat (no gaskets needed). They never crack, leak or fail. TorqueTubes tuned-length tubes produce a huge reserve of low-end torque. Now your Workhorse climbs faster and stronger, without the transmission struggling between gears. Ask any engine builder and they will tell you that allowing the engine to breathe better is the name of the game when it comes to improving horsepower, torque and fuel economy. No longer will your coach downshift at the slightest incline and rev the engine to the moon. The combination of our custom tuning and the airflow improvements work together to more efficiently mix the fuel and air for better combustion which equals better fuel economy! We can’t guarantee a fuel mileage gain but most of our customers do report a slight gain of between 10-12%.

Stage 3 Package Contains:


UPWH  -  GM/Workhorse 8.1L Custom Tuning



UltraPower Custom Programming for the GM 8.1L 496cu has long been the ultimate performance modification you can make to your Workhorse/Chevrolet RV or truck with the highest power gains on the market, at the best price. Thousands of satisfied customers have reported fuel economy increases along with the addition of the extra pulling power when tackling steep grades. Also, less downshifting will occur as a result of the increased power. UltraPower Custom Tuning works very well on both stock engines or ones that have been upgraded with Banks Power Systems. Banks even admits their handheld AutoMind only changes one parameter within the computer, whereas UltraPower changes approximately 400 parameters. That is the difference between cookie-cutter and custom.

We are now offering 5-speed Allison Transmission tuning on model years 2001-2005 W-Series. The main change you will notice is the transmission will shift into overdrive below 50 MPH when under light throttle. We also demand more load before it will downshift when pulling hills which means less downshifting. Increased line pressures also helps prolong the life of the transmission and optimizes the shift points. If you select this option with core exchange you will pay an additional $500, however, if you return your original TCM we will credit you $400 back.


·         GM/Workhorse 8.1L Engine

·         GM Trucks/SUV’s with 8.1L Engine (May require Passkey and Crankshaft Position Relearn Procedures)

·         Workhorse Motor Home Chassis from 2001-2011

·         Kodiak C4500/C5500 Chassis with 8.1L


·         Gains of 60 HP and 70 lb-ft TQ

·         Gains of 1/2 - 1.5 MPG

·         Downshifts less approaching hills

·         Improved throttle response

·         Improved acceleration for merging onto freeway and passing vehicles




If you will be sending us your ECM for reprogram you do not need to select core charge but if you are wanting us to program and send you a computer you must choose the core charge. For your convenience, we include a prepaid UPS return label to send your core(s) back.

If you are sending your ECM and/or TCM in ship to this address:


Ultra RV Products

3912 Harrison Ave.
Centralia, WA 98531


SPW8100  -  UltraPower Magnum Life-Time Spark Plug Wires


UltraPower Magnum Spark Plug Wires are patent protected because of the unique method of producing these wires which have extremely low resistance while maintaining very high noise suppression. The benefit of this invention is that full electrical energy from the ignition source is transmitted to the spark plug. The end result of the application of this method is increased horsepower, torque, fuel economy and a smoother running engine.



·         Patented Solid Stainless Steel Core Spark Plug Wires with RF Eliminator

·         The technology in these wires comes straight from Nascar and is not available on the open market. They are made out of a patented zero OHM, solid core stainless steel wire wrapped by silver plated copper conductor wire and are outfitted with an RFI eliminator collar that guarantees no interference with radios.

·         These wires must be installed with GM factory heat shields which may be reused off your old wires.

·         High temperature silicone boots, 8mm jacket with fiberglass-reinforced braid that resists temperatures up to 500°F.

·         Increase power to the spark plug up to 400% over stock!

·         Adds up to 15HP on Big Block GM engines.

·         True Life-Time Lasting Wires, Life-Time Warranty!


·         Workhorse chassis with 8.1L (2001-2011)

·         Workhorse chassis with 6.0L (2004-2006)

·         All GM vehicles with 8.1L (Silverado, Sierra, Avalanche, Yukon XL)

·         Industrial applications with 8.1L (Generators, Forklifts, Pumps, Compressors, etc)


853072  -  Workhorse 8.1L Performance Muffler


This is a replacement muffler for the Workhorse mufflers, minus the factory flanges and hangers which should be reused. These mufflers also flow much more than the factory mufflers so you will want to install them as a set. These mufflers have proven to increase performance and extract exhaust heat from the engine. These gains are also achieved while still retaining the factory mellow sound. We have seen on average a 10-15 horsepower increase with these mufflers installed when tested on the chassis dyno.

A popular choice for many customers is to install these mufflers along with a set of Banks TorqueTube headers. This will give you the peformance that the headers provide and still leave you with true dual exhaust all the way back, without leaving the restrictive factory mufflers in place. With this combination we see about 30 horsepower and 40 ft. lbs. torque increase. 


·         Workhorse Motor Home Chassis from 2001-2010


49504  -  Banks Power TorqueTubes for Workhorse W22 2001-2003


One look at Banks TorqueTubes tells you how radically different they are from the stock exhaust manifolds. Constructed of heavy-wall, 400-series stainless steel, TorqueTubes have 1/2-inch-thick flanges that are welded on both sides and then machined perfectly flat (no gaskets needed). They never crack, leak or fail.

TorqueTubes tuned-length tubes produce a huge reserve of low-end torque that proves its worth on every steep grade and short onramp. Now your Workhorse climbs faster and stronger, without the transmission struggling between gears. The muscle to stay in higher gears longer not only stops annoying "shift happy" performance, it lessens the load on your engine and transmission. Here's power to reach freeway speed sooner for safe merging and passing.


·         2001-2003 W-Series Chassis - Allison Transmission - EGR Equipped

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  • $2,743.99

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