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Glad to know my USM HSR can live that High. I plan to move my shift point from 5200rpm to 6200rpm with a better shortblock.
Mine has pulled all the way to 6000rpm strong but I did not go further, recenlty I changed my rev limiter to 6500 so I am anxious to see if my home made box performs differently than the USM unit.
Not to Hi-Jack but I will have dyno info soon, I dropped my car off today at a local tuner