It's not so much the extra effort. From what I gather, equal length headers make more power. I wanted the HKS turbo, this has the twin scroll flange, so I made the other parts suit.

My belief is that the HKS will make good power and torque, and although it's not true twinscroll, I believe it will have more benefits over a single entry, single scroll, but less benefits than true twinscroll. Bit of a in-between I guess

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Cheers,

Simon.