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Message: [QUOTE="Bigshow, post: 1182055, member: 5650"] Larz said their current power levels are STOCK, TOW, STREET, and PERFORMANCE. For guys who have run different tunes, how do STREET and PERF compare to KEM and Spartan tunes? I've only run KEM. Of all the KEM tunes, I liked the way the truck ran with the 345. The tune is too smoky for my liking, and I'm scared of that power level w/o studs. This seems especially risky in our cold, dense air and the associated high boost levels in winters. I will be going GH on the truck I am currently deleting... [/QUOTE]

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