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Straight out of cow worshiper land now and as far as I know they don't quite have it down yet. I ordered from Summit and the send me mixed pistons 4 USA made and 4 from India. If I hadnt had the american product in my hand I would never have been able to distinguish the poor craftsmanship/metallurgy in the Indian product. NIGHT AND DAY!
IMO Spend some more money on Keith Black or similar products and be happy. A hyperautic (sp) piston is only slightly more and I would be more inclined to stay with USA product. Unless Japan starts making them
im using hypers in my truck. every single person who has used them told me to use them. i know quiet a few guys that own speed shops.. (wot-tech.com, h&f performance here in nc.) and a few others. and they ALL recommend them. and i agree with the india comment about them. i got some sealed power (all pistons are pretty much federal mogul sp?) although i think theyll work fine, theres just small casting flaws that should be cleaned up. mine are 9.8:1 (if you want pics ill post them up.)