1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

R5 Irons

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Old 02-12-08, 05:58 PM
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Stu-Tron Get Yo Groove On

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R5 Irons

I remember reading something about these Irons in particular. I searched for it but none of the threads had anything really to say. What is so special about these irons?
Old 02-12-08, 06:03 PM
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Big stock ports.
Old 02-12-08, 06:08 PM
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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.
Old 02-12-08, 06:08 PM
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Are those the ones that...Jeff20B I think, is such a fan of?

EDIT Appears as he has posted at the same times as me...
Old 02-12-08, 06:18 PM
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Stu-Tron Get Yo Groove On

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Ah, because I just found out that my Half street/bridge plates are R5
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