Hello All,

I currently have several inlet manifolds and I see some differences in the fuel line routing and injector feeding.

GC8 MY00 + STI EUDM 02 injector feeding :

4 => 2 => 3 => 1

STI JDM V9

3 => 1 => 2 => 4

Knowing that firing order for all Impreza are 1 => 3 => 2 => 4, seems logisal that fuel supply would be at the opposite such as GC8 MY00 and STI EUDM 02+

My question is why Subaru has different injector feeding for JDM V9 ? Does anybody knows ?
Second question, Is there any advantage to run same routing as per JDM V9 ?