Engine/Transmission (1994 - 1998) BD vs ATS Manifold

[BLeinart]

Wondering if anybody knows the difference between the BD and ATS 3 piece manifolds. I was looking to buy, wondering which is best, or if there is a better one out there

 

[hdm48]

since I modify these manifolds and the turbo's to match I have to say they both work great. However, if you are looking for max flow (after porting) the ATS will flow a little more.

I'm not saying you NEED to port them, it's just the approach in the manifold from the head is a little poor on both.

With a stock engine or mildly bombed engine they will work well as is.