I'm about to order an Invidia dump pipe for my evo8. Does anyone know if they include the o2 extension cable? and if the cable is 100% necessary. I'm trying to order from lancershop, i received a shipping quote but no response about the o2 extension cable, and i can't find the cable separately in their store.

 

you don't need a cable, you will need to re-route the harness for the O2 sensor. not hard, you can search for it... but it needs to be routed along the right side of the engine and down by the upper radiator hose. That's a great housing, good luck.