Just something you might want to consider... Say that you have an intake and it adds 18whp, and then you have an exhaust that adds another 8whp on top of the 18whp. But say if you did the exhaust first, the dyno would register 20whp and downplays the intake to 6whp. So you might want to consider that when you calculate the whole cost per HP gained. So doing a total price divided by total whp might make more sense than doing individual piece calculation. Hopefully this makes sense... Unless im talking complete B.S., just ignore my post.
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