![]() ![]() CONCLUSION: The tuner works great in performance mode and definitely adds significantly noticeably horsepower/torque that you can actually feel. On some of the downshifts, most notably the 3-2 and 2-1 downshift, I actually have to adjust brake pedal application because the additional engine braking combined with regular brakes will start to slow the truck too fast/soon. When I exit the highway from 6th gear 70+ mph speeds, I can hear the exhaust note change and feel every downshift from 6th gear to 1st as I approach the stop at the end of the exit ramp. ![]() I wouldn't describe it has harsh by any means, but this is the first tuned vehicle I've owned that I can feel and hear (exhaust) every transmission downshift while I'm decelerating for a stop. Something else I noticed in regard to shifting is the downshifting on deceleration/coast. The truck does the same gear searching between 5th and 6th gear at the 49-50 mph range. I even noticed that if I set the cruise at 39 mph and hit the slightest grade increase in the road or even have a head wind that the truck will search back and forth between 4th and 5th gear. over and over all day it will do the same thing back and forth between 4th and 5th gear. I even tried setting the cruise control at 40 mph (truck will be in 5th gear) if I hit the - button to decelerate 1 mph, the truck will downshift to 4th within about 3 seconds and if I then press the + button to increase 1 mph, it will upshift to 5th in about 3 seconds. When cruising at the 39-40 mph speed, the truck is constantly shifting back and forth between 4th and 5th gear. I typically try to hover in the 4-5 mph over the speed limit range and this is what caused me to notice the shifting issue. EXAMPLE: When I drive the truck to work, I drive about 5 miles on roads with a 35 mph speed limit and another 5 on a 45 mph speed limit road. The tunes seem to be way to speed/mph dependent and not dependent enough on engine load. I'm very disappointed in this aspect of the tuner and even though I know it's a "performance" tune, the truck is primarily used in normal daily driving conditions. 1) Performance - The performance shifting of the truck with the tune under hard acceleration is awesome. SHIFTING: This is a two part answer that I will separate into categories of performance driving and daily driving. In this regard, I'm very happy with the tune and I would rate it with five stars. Just driving away from the gas pump, I could immediately notice an increase in throttle response and when I pulled out of the gas station into traffic, I immediately noticed the power increase. POWER AND THROTTLE RESPONSE: Awesome! I filled my tank with 94 octane (Ultra) from Sunoco and uploaded the tune as the fuel was pumping. I've had the tuner for a week and thus far have only tried the 93 Octane Performance tune. My last two tuned trucks were a 20 FX4 F-150 and the tunes for those trucks were from Troyer Perfromance. I typically purchase my tuner/tunes from the company that seems to be the most popular and have the most experience with the vehicle I'm tuning in this case, 5-Star seems to be far and away the most popular among Raptor owners. Our customers are advised to ensure their vehicle and products used on their vehicles, comply with emissions standards.Let me preface my review by stating that I've owned several vehicles with tuners and custom tunes. We always aim to meet emissions requirements and standards. To the best of Preaux Tuning's knowledge and understanding, our calibrations do not affect vehicle emissions, nor do they alter or adjust the operation and functionality of the factory On-Board Diagnostic System Emissions components. THIS X4 WILL WORK ON THE FOLLOWING VEHICLES: Please email to inquiry for other tune options and to discuss any modifications done to your vehicle. This X4 Tuner does not come with any preloaded tunes, so you will need to select from the options if you would like to purchase a custom tune for your vehicle. This X4 Tuner is sold as a package (7015PG-B) that includes the X4 Tuner and a custom ECM cable. ![]()
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