I put a K&N intake and dual exhaust on my Tahoe and the mileage increased by about 1.5 mpg and it felt like it had more power. I thought about doing the tuner in the near future....
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RobS
71 Demon, AlterK - 4 link GenIII hemi conversion
66 Rambler Classic Wagon, LS conversion -Scott's IFS/4bar-bagged
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