Donkey Punch
Panantukan
For small block, self aligning roller rockers. 1:6 ratio 3/8 stud. .575" lift maximum. Cannot use on ZZ3 engines or engines with orange valve springs. GM pn. 12370839. That pn has been replaced with GM pn 19210729. They are identical. asking 300.00 plus shipping. currently only accepting paypal
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