I'm just using the Ebay special Stainless Steel 4-2-1 with two O2 bungs (one on runner #4 and one at the collector).
If you can, sometimes you can find OEM VX manifolds for sale for about $40 too. That way it's a simple bolt on affair (if your catalytic converter is still good) and you don't have to go changing your whole exhaust system.
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