The 1975 18R-GRU, saddled with a Japan-spec emissions system and a Yamaha head, was rated at 130, while the 18R-GU, adding non-rebuildable carburetors and electronic ignition, …

Jun 30, 2022 · The 18R sounds beautiful and can haul ass, they made for some awesome rally cars. I cannot speak for reliability NA or boosted as I likely know less than you. My plan was a …

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