The cartridge is made by a guy in southern cal for comp, I forget his name (Shafer maybe?)
Ask Tom S he knows a lot about it and is using a set in a Pontiac.
They've been out for a while now and from what I've seen so far they seem to be a great lifter. The part I like is if there is ever a ticker problem you can just swap the cartridge.
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2019 Pontiac Heaven class winner
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