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From what I have seen they all tend to fall between $5500~$6995 for a complete kit depending on the source. If you have the know how, a place to do the work and tools you can DIY in a weekend. I think most come with a base line tune to install to get you up and running. After that I would take it to someone with a chassis dyno for a final focus.
If you are a mature adult and can resist the temptation to plant your right foot and experience the rush every time you drive it...about $7000 is the budget number.
A friend with a 2014 6.2 Escalade EXT installed a Magna Charger kit with outstanding results....however in his case he found that he was over driving the brakes which sent him off on another $5000 investment in a "Super Double Throw Down" Willwood brake upgrade. Next came Cam and Exhaust...eventually leading to a Transmission and Transfer case HD rebuild. Once you start you find yourself wanting more !! LOL.
There is something to be said for surprising the hell out of some dude in a Camaro SS or Mustang GT with the view of your tail lights....after all your dusting him with a 3 ton brick!!!
I love the TVS2300 on my Denali XL. She is pushing around 750HP and has no issues getting up to speed from a freeway onramp. That being said, I do think that the TVS2300 is a bit overkill for the 6.2Ls, as the TVS1900 seems to be a bit more efficient on our 13 Silverado (6.2L).
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