I wouldn't look at the gains when the differences are negligable. Look at what sound your looking for. I gained 30hp, but I had LTH's as well. The Motordyne exhaust sounds amazing, but may sound different with any other exhaust mods. I have Tanabe and love it.
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Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI
New Car: Under Construction
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