I have recently purchased and installed the D3 performance tuner and have taken out the jb4. I have seen a huge difference in just the overall drive with the D3 flash and im extremly happy with it! Redline is now to 6500 instead of 6000, there is a 93 octane tune, throttle response tune, hp tune etc and you can run them all at once or seperate. D3 will also be doing more updates for tune with new maps as time goes on! The car is not making a huge power difference from the flash over jb4 but just no comparison from eachother. More videos to come and more boost!

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