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1. Any tool that allows you to adjust beyond the limits of the engine is a risk.
2. Any "tuner" creating a tune without comprehending knock, boost levels, SPI, engine warmup,mechanical limits and other factors is a risk to customers and their engines.
My suggestions
1. Use reputable tuners
2. Get a custom tune specifically for your car
3. Allow your engine to adapt before going WOT with a tune
4. Allow vehicle to fully warmup before going WOT
5. Use SN+ oil to reduce the likely hood of SPI
6. Gap plugs correctly
7. Use good fuel brands
What the concensus should form on this forum is the safe power level is for the stock internals and anything higher should require hardware changes (which tuners should be notifying customers of this information, imo).
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