I'd guess 360 hp, +/- 5 hp
You need a before/after dyno ramp run to determine the % gain.
MAF-based systems do a decent job taking into account certain types of mods, because they measure the airflow increase and can add more fuel. You might pick up a few hp with a tune. If you modify the intake, or change sensor locations (like O2 sensors on aftermarket headers), you're more likely to need a tune. If you had an alpha-n tune, you would definitely want a retune with any hardware change.
Last edited by pokeybritches; 02-04-2018 at 06:17 AM..
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