Any input from of the experts here? I know my questions are pretty pedestrian, but I could use some input.
If the cat back says it's 7-10% boost, and the filter is 14.9 HP (http://www.carid.com/2009-subaru-leg...es-324597.html
What does this do to a 2.5i?
170 + 14.9 + (170*.10)
Just curious on how the calcs work.