R5 Irons
#3
Lapping = Fapping
iTrader: (13)
Wrongo! They are the same as any '76-'85 stock 12A, but weigh a little more than Y plates. There are a few different variations of R5 plates; some had small GSL-SE sized primary ports. Most others had the same tall runners and 12A-spec port timing as any '76+ 12A or '76-'78 US-spec 13B. They come in nitrided and non nitrided. You can port them as large as a Y plate.
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FührerTüner
2nd Generation Specific (1986-1992)
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09-27-15 02:16 PM