this is a jdm B16a manifold on the B20. The manifold is far supperior over the a20 or b20 manifolds, with larger, shorter, and more direct ports. the manifold has increased top end preformance significantly. its time for a set of cams:)
http://openloopmotorsports.com/B16man1.jpg
http://openloopmotorsports.com/B16man2.jpg
http://openloopmotorsports.com/B16man3.jpg