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Personally I have firepunks tuning. But have flashed trucks for people with PPEI an never had a problem. I think on a stock truck that either tuner is probly very close to the same. I chose firerpunk just for the fact he is closer to me, an I felt that a guy that has built tranny’s for a living would have better under standing on trans tunes but that’s just my 2 cents.
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