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Unread 08-24-2019, 11:45 AM
M.du Maine's Avatar
M.du Maine M.du Maine is offline
Won his first race on the new TZ!
 
Join Date: Jan 2007
Location: Assen - Netherlands - EC
Posts: 329
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Hi Bony, if you want them for driving, it's better to use second hand and 'detonated' RD 250/400 heads from up 1976, as they were a much better casing than the OEM stuff. Only thing you have to do is rework them on a CNC lathe, get an O ring grove in and flatten the Cylinders. We did that very often.
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