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Old 12-19-2005, 04:31 PM   #1 (permalink)
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HF1 and HF2 Piston Markings

What do these markings mean on the side of the pistons. This guy who sold me 4 oversize Pistons, sent me three that actually were oversize and one was standard. So I told him that I wanted the other oversize piston. I then sent him the STD piston. The Piston arrives today, I break out the micrometer and it is a STD piston measuring 3.4248", clearly a STD piston.
Now he's trying to tell me that HF1 is for the STD piston, and HF2 for the Oversize.

Well I almost bought into that being he sent me an HF1 and the one Oversize Piston I looked at had HF2 stamped on it. But, when I went to check the pistons that I had miced(which I knew were all STD piston) they were marked randomly with HF1 and HF2. Basically telling me that mark meant nothing about it being overbore or standard.

Anyone?

Last edited by Yuleluder; 01-18-2006 at 07:41 PM.
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Old 12-21-2005, 12:27 AM   #2 (permalink)
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i doubt the hf1/hf2 means anything. mabye its used to label where it was manifactured? when i got my type-S pistons...none of the numbers on each piston matched except for one on the top of the piston, nothing to do with hf#'s tho.
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