I had nitrous on my m104,a 125hp wet shot,bought the kit used on ebay for $350. Its the cheapest way to go,instead of forced induction.Chips are a scam,they fool your computer to think incoming air,or water temp is cold.You can do that yourself with a 5 cent resistor.

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1999 w140, quit voting to old, and to old to fight, a god damned veteran