The only ones Ive seen / heard of fail was by improper installation. Your wording makes it sound like the kit failed, which is far from the case.The only complaint ive seen... One of the local guys here had the o-ring on the Visconti Flex kit fail. It dumped a 1/4 tank in a matter of minutes. There's been a few ppl its happened to, so just keep an eye on the fuel line.
Other than that the performance on 93 is great, but going to e50/flex is outstanding. As far a tuning my preference is Mikey Botti. Either you can email him or purchase the package from @EastCoastSupra he does offer the OTS maps and Flex fuel package.
https://www.eastcoastsupra.com/product-page/ecutek-kit-featuring-mikey-botti-ots-tunes
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