Pop the hood, on the front cross member I think on your left you will see a painted over plate. On that plate will be your paint code, for example mine is 904.

HP dropped off a bit in 1993 I think. They also got limiters. For example the early M120's made 402 and the later ones made 385. I think the power drop on the V12 happend when they switched ignition systems.

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2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200