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^ so ive heard.
i have no experience with them except that i think i read somewhere that they arent good/might be bad. i figured maybe if op was interested he would research and learn for himself.
I got my NPR rings in the mail today, compared my rings on my GTE pistons, they all look the same specially the engraved " 1N" and "2N" . But my GTE rings are chrome and the NPRs look like steel.
