Does not work as Advertise at all! I got the chip stage 2 for my RAV4 and I let it in the car for 3 weeks (instead of the 2 suggested) and not only didn't improve the miles or give me more power but on the contrary I felt the SUV to be more lethargic then usual, and the miles when down by 3! I paid for shipping back ($11.15) and they also charge me 15% restocking fee?!?@ Their website states 100% money back warranty. I will not recommend this company to my worst enemy!! Update: They reply with lies as you can see below. I have contact them and send it back in the original box with no a scratch in the time allow. I have all corresponding messages and pictures.

So people if you get one through three stages you want be disappointed ! Well people like they advertise that it is no gimmick, well it's not I got a stage two for my 2014 Silverado and another of the same for my son , he has a beautiful 2011 black SS Camaro that still has under 50.000 miles on it and you can tell the acceleration in both his and mine such a big difference! That is what I like about the chips there is no hesitation anymore and when you are rolling down highway o yea and hit it around other slower traffic big difference. Now as far as gas mileage well I think it is about the same that I was already getting ,but I am very happy with them . I have got two other friends to get them and counting . Alright Smarttune performance chip manufacturer all that I put in this review is true and very happy. I should get a stage three for all the sales I have sent your way lol .

2008 Ford Crown Victoria P71 Police… 2008 Ford Crown Victoria P71 Police Interceptor 4.6l. Factory dual exhaust which I removed factory muffler and installed 2 FlowMaster single chamber mufflers along with a K&N filter in factory box( since that truely pulls cold air from outside engine compartment). These vehicles come from Ford with high performance tweaks already. I installed the Stage 1 Performance Chip and within about 150 miles I noticed much crisper throttle response and firmer shifting! Along with an Awesome WOT!! Ive tried other performance chips and IAT splice in chips but nothing compares to this simple plug and play chip, best $100 you can spend to "wake up" this 4.6l ! I just upgraded to the Stage 2 Chip and will post a review after a few miles. I am a gear head and have been wrenching for 40 yrs. Living in California I just wanted this car to get out of its own way and Performance Chip answers that problem. I do own and build hot rods/muscle cars. This P71 is a shop car/parts runner.

Let’s just say I got dyno sheets to… Let’s just say I got dyno sheets to prove these chips are garbage. I have 1/8 mile and 1/4 mile times that say they don’t make any changes to ur car. Tried out on two different types of cars save ur money. I am thinking about starting a class action law suit so people stop getting scammed. If interested let me know you can call my attorney.

Stage 4 power chip Amazing product, easy to install, looks great on dashboard. Great company they are concerned about their clients.