Alright here is my initial review and thoughts:
- instal went fairly smooth, as with a lot of aftermarket builds I’ve done, it was not exactly bolt in..... Not a huge deal, but I believe this kit is mainly designed to fit a tundra, radiator had to be fabbed in, and hoses around crossover pipe had to be rearranged differently than directions laid out. In my book, none of this is a deal breaker, just normal crap you deal with when modifying a vehicle!
- Harrop claims no tuning needed, which has been controversial! Harrop designed this kit to work on newer 5.7s that are not tunable, they do this by modifying the fuel pressure regulator and supplying a high performance fuel pump! With those 2 mods, the theory is the stock tuning will be able to dump enough fuel to compensate for the added air! This is 100% true, I watched all of my parameters and everything looked fantastic on the test drive, no spark knock, no check engine light, timing was advancing when it was supposed to, everything looked great!
- Only negative drivability I noticed was it accelerates so quick on full throttle you will occasionally feel it hit the rev limiter before it has a chance to shift!
- Lastly my thoughts on performance, this thing rips, it is worth every penny, I couldn’t stop smiling the entire test run, and another side note, my wife loves it!
-and a reminder, I am a dealer, and would be more than happy to help anyone with purchase or purchase and install!