So previously my B16A had an ITR manifold mounted on it. After some honda tech research I thought I might replace with B16A manifold. Here is why , the ITR IM only see’s any real gains at high rpm. I spend most of time daily driving and plus it worked out for a school project in witch I need to create a DIY using Adobe Illustrator. The hardest part is definatly the rear bolts that hold the manifold on to the head.