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I hope you never need to take advantage of the warranty but it’s great that they’re offering it. I personally struggle with their 1K warranty cost on an engine that’s stupid expensive.
The Dinan unit gives a decent performance bump that I personally feel pretty safe with and my car’s drivability has not suffered at all. I’ve tried other piggy back units on other cars and this is the smoothest one I’ve had including JB4 (on Audi not BMW).
Maybe that’s why some didn’t feel that it’s doing anything, because the power delivery doesn’t spike at a certain RPM.
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