I had emailed the guy that designed the system and he said the tuning is the same way you tune a LS engine. I have replaced the original opti on my car and few years ago not for it not working just because when I opened it up there was oil inside so I decided to change the opti with a new GM one. I'm thinking of the future with the engine because of the price of optis and not many manufacturers are making new reliable ones.
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