i noticed that between the years of B16's the exhaust manifolds have subtle differences. I used a 94 Del Sol downpipe with my JDM dual O2 sensor manifold, the Del Sol downpipe stud holes dont line up. i had oblong the down pipe holes to match the manifold stud pattern. I also noticed the JDM 88-91 B16 manifold is thicker looking than the Del Sol manifold and the heat shields arent interchangeable. Just some differences i thought id share.