I think the OBX headers seem like a better choice. They look more balanced for the I6 firing order, but the only way would be a flow bench and few dyno runs. The only thing, the O2 sensor bung needs to be cut and welded closer to the collection pipe, that way the sensors readings are more accurate.
If I were to get the OBX header I would re-enforce the welds around the flandges and where the pipes meet, and then move the O2 bung closer.
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Whats in the garage, well.... in the yard.
1986.5 Toyota Supra - NA - 5 spd
1986 Ford Ranger Lowrider - 5 spd
1984 Ford Ranger XLT - 7" Lift - 4X4 - Auto
"Stuck in the 80's"
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