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oh! you just reminded me: flash to the RoW program with the PST. this disables the secondary air injection system, allowing removal of the valves & the pump. that pump is HEAVY!! the RoW flash will also eliminate the second set of O2 sensors & the clutch start switch.
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and makes it run like poo poo.. You can remove the pump and valves without the flash. Porsche sells the factory blockoff plates for $16 (euro cars don't have smog pumps) and our cars only use them during cold start.
I have tried the euro tune multiple times. Unless you "retune" their tune.. it makes less power.