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Engine Control Module PROM

Bully Dog - 4 Position Chip (41104)

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Ships within 5 business days
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This part fits

  1. 1999 Ford F-250 Super Duty 7.3L V8 cid:445 Manual
  2. 1999 Ford F-350 Super Duty 7.3L V8 cid:445 Manual
Authorized Dealer
white carb warning, not legal street use in California Not for sale or street use in California.

About this product

Part #: 41104

Simple and effective, this 4 Position Chip is an easy way to tune your vehicle for fuel mileage and power. By utilizing power levels (0-2), it is possible to attain anywhere from 30-125 hp/tq gains with the top level (3) adjusting for high idle. Tuning your engine has never been easier; this chip delivers all the performance you need while you're on the road.

More Details

See what our community says about bully-dog products

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What made you choose this particular product?
I first began researching this product because the stock setting for my speed limiter was 20 mph lower than the car's drag limited top speed, which bothered me out on empty, desert highways. When I looked into different tuners, this one claimed a decent increase in power and torque while not affecting fuel economy or actually increasing it. The reviews affirmed these claims and reassured me that the tune would not fry my ECU. I also like how this product can advance my vehicle's timing to its most efficient level (2 degrees) at the cost of emissions increasing.
Is this your first time buying from this brand? Did you consider other brands?
Yes. Other brands were either too risky for my car's ECU or too expensive for the benefits they delivered.
Was it easy to install? Any installation tips that will help others?
This product plugs directly into the OBD2 port of my vehicle. For power, there is a USB cord so you can bring a laptop in the car when you want to tune. Permanent powering is harder because you would have to drill through the dashboard to the fuse box and splice in the wires. I chose not to do this because I only need it for periodic tuning so I just take the product out when I'm done.
Once you've had a chance to use the product, did it meet your expectations?
Good bang for the buck. Increased top speed from 110-130 mph, increased HP from 175-200 (not dyno tested), and increased torque to the extent that I do notice a difference. WOT acceleration is also enabled under 40 mph, which can be fun with the paddle shifter.
View on Jake's build
product page reviews icon 0product page reviews icon 1product page reviews icon 2product page reviews icon 3product page reviews icon 4
What made you choose this particular product?
Ease of use, information guages
Is this your first time buying from this brand? Did you consider other brands?
Yes
Was it easy to install? Any installation tips that will help others?
Very easy
Once you've had a chance to use the product, did it meet your expectations?
It was very fun
Any additional comments?
Use only as a guage. No longer a tuner
View on Levi's build
California prop 65 warningWARNING: Cancer and Reproductive Harm www.p65warnings.cs.gov

*Some manufacturer restrictions apply.

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Based in California with 3 warehouses across the country, we’re sending out shipments everyday of the week, even Saturdays. Because your next mod shouldn’t have to wait.

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Smoking Tire / The Drive

Thank you for all the help, really. You guys are awesome. This is all great info and I really appreciate everything you have done to help me with my build.

James M.

Ford Focus ST

Your customer service is wonderful. Thank you for taking care of this. My review will express all. Thank you!

Wallace R

Chevrolet Silverado 1500