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962 Posts
Mine would see 20 psi with just a K&N and a straight pipe and base fuel regulator shimmed, added SCMT micro tuner and saw 25 pretty often at the top of 3rd. This was unloaded on level ground in a 4wd reg cab F250HD (1997) Remember 97s did not have a wastegate, and stock AR was 1.00 or 1.10, can't recall.
