forgot to mention, the reason I'm using 2" dia pipe is because that's what was on the donor.
the BMW manifolds looked very constrictive as they all bent sharply down to follow the contour of the engine to allow it to fit in the engine bay of the 5 series. Some were even very squashed across the cross section as the crossed over eachother.
I just want something to get it going for now, and maybe upgrade when funds allow.
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