Posted by Daryl in Oz [58.178.146.25] on Saturday, December 01, 2012 at 15:09:28 :
In Reply to: "M37 High-Compression Head"? posted by Sherman in Idaho [72.47.9.37] on Saturday, December 01, 2012 at 12:57:14 :
This is a later hump head with internal bypass, so not recommended for external bypass blocks.
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