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Old 11-30-2008, 11:12 AM   #3
-xlr8planet-
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Quote:
Originally Posted by Low Impedance View Post
not exactly familiar with "R5". What is that referring to exactly
R5 is the designation for the 79/80 12A irons.

Y is the designation for the 81/85 irons.

R5 engines use 18 tension bolts

Y engines only use 17

There are small changes depending on what market the engine was going to.
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