Stealth Module - Chevy/GMC Duramax L5P 6.6L (2019-2023)
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"Stealth Performance is badass. I towed my 5th wheel 41 almost 3000 miles and it towed flawlessly. Better gas mileage. Better pulling power. Better out of the hole feeling. Very happy with my purchase" - Michael G
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Absolutely love my install of the Stealth Module. The first MPG was 21.3 MPG on a 120 mile trip. Then I went on a 440 mile trip with towing half of the trip and averaged 19.5 MPG. Towing I usually got 10-11 MPG but this time 12.6 MPG. It doesn’t get any better than that. Worth the investment.
It did just what they said..more responsiveness..better peddle. It did nothing for fuel mileage. I would like to have a setting for better mileage if possible…but all in all it’s exactly what they advertise
Works better than expected. Better response and mileage
Setting up the system was easy. Followed the instructions and easy. Was on setting 2 for bout, decided to change to 3 for more the highway and empty load. 300 miles and did 21 mpg and there was a point where I had to back off the throttle, didn’t realizing I was going so fast lol, definitely worth the money and definitely helps the motor and transmission big time, will big again
Works great, really woke the truck up. Just took it in a long drive totaling up 300 miles, feel great, plus increased my fuel mileage up to 22 mpg, had to back off little when I realized I was going to too fast. Was on setting 2 but switched it over to 3 for more of empty load, no trailer and mostly highway
Have had this installed for over a month. On my first trip with my bed fully loaded I got almost 2 mpg better. Pulling my 5th wheel over a 1,200 mile trip between Omaha and Estes Park, CO I averaged 9.2 mpg. I was very satisfied with the performance and better fuel mileage.
Wow, sums it up best. I sat on the fence for a while before purchasing my Stealth Module really wondering if it would really produce what it says it does. After a straight forward installation, I was pleasantly surprised to find out what this product does. Right from the start I noticed how much smoother acceleration was at all speeds. Also, how much more acceleration there was in general. Almost felt like a completely different truck. I tow a RV but have yet to tow with the module. I expect good things when I do based off of what I have experienced so far. My truck was good before but it's amazing how much better they can be and you might not even know it. I recommend you pull the trigger if you're still not sure. I'm glad I did.
The module way a pain in the butt do to the connections on the truck. After installing it the truck runs a lot better and I think I am getting better fuel mileage!!!
I expected a little deference when I installed it but was surprised how much it changed the performance to the better like I got a new truck with out the cost of a new truck very impressive
Way more response! About 4 mpg more . Great product
Purchased this with recommendation from a friend. Installed it immediately upon opening the box. With in the first test drive. Felt a noticeable difference in power and performance. Haul and tow with equipment and materials for my company and it a game changer. Completely satisfied with the performance. Well with the investment.
Easy connection. It really woke it up. better fuel. Price a little steep hope over time it pays off. It runs better so it must be better for the engine. Haven’t had it long so far happy.
I’ve on run one tank of fuel since installing the stealth performance module so haven’t had a good test for mileage. I have noticed a big difference in response and acceleration though. There is no lag time like before and the throttle is really sensitive. I’ll be going from Washington to North Carolina in September so we’ll see how the mileage does then!!
Works great. Would recommend this.
Raised fuel mileage 5 to 6 miles to the gallon running empty pulling equipment more low end torque
Only have it installed for a week. Can tell fuel milage is up by about 2 mpg. Have not pulled my camper yet to see the improvements on that. Throttle lag is much improved.
It definitely gave it a kick in the butt. Thank you guys excellent job.
So far I just made a trip in the mountains pulling a generator weighing about10,000 lbs with no problems at all. I am well pleased with the results!! I also got about 3 to 4 mpg better fuel mileage!! I am still in there testing mode, but so far so good!!
Easy to install . Works great ! Noticed a major performance difference immediately !
I pull a 16000 pd 5th wheel and was getting 8 mpg. on 1st trip it it went up to 11. without trailer truck is a lot more powerful