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for 04-05 6.6 duramax, this tuner will add up to 150 hp, 255 ft/lbs torque. raise top speed limiter, increase rev limiter, adjust shift points, calibrate for tire size. 3 power settings for high-perf, towing over 6,000 lbs, and towing under 6,000 lbs.
10 minutes to program. i had this on my sierra for 40,000 miles until i turned my lease in. very easy to use and in my opinion lives up to its claims. very big difference from stock. programmer is NOT vin locked. it's ready to install. new price is $400+. buy this for $250 and save. phil
517 404 3631
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