I was without my Ecutek tune for a couple days after selling my bolt ones and putting it back to essentially stock but with motordyne exhaust. It was such an enormous difference in throttle response alone I actually hated driving the car - so I didn't. Wasn't going to update the tune u til after the supercharger install, but it was so bad that I asked Seb for a canned tune that only considered the exhaust. BAM! It was alive again.
I literally could not drive the car without Ecutek. The difference is just astronomical, even with just basic upgrades. Once you do it, you won't look back.
As to Uprev bs e item, I've had both and if stock is 0, and Ecutek is 10, Uprev is about a 6 on the scale. Just to offer some perspective from someone who has had both.
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