If you’re aiming for 500. Don’t do unequal length. Yes I get sound May be more pleasing but literally every other aspect (power, soool, reliability, drivability, etc) is better with equal length. Go killer b if you can afford it. Tomei/Iag if you can’t swing killer b. I’m not lying when I say it’s significantly better in every way possibleAlso what do you think about the Borla unequal length turbo manifold header?