When we looked at the Evo manifold design, the objective was to reduce manifold internal volume to sharpen response and to also keep is as high flowing as possible. To do this we used a non tradition (in the aftermarket) reverse rotation design. This allowed us to NOT to use tight radius bends where other have to because standard rotation turbos put the turbine inlet flange closer to the block. We have used a reverse rotation turbo design, in much the same way as Mitsubishi did with the OEM equipment. This allowed us to low mount the turbo, use no tight radius bends, and also keep the manifold very compact. This design used a 33mm runner ID to help aid in very fast transient throttle response.
The Evo 4-9 manifold also uses our 50-55 v-band system allowing Precision , Tial or Garrett turbo fitments.
The wastegate flange also is designed to accept most 44/45/46mm wastegates.
*** REQUIRES REVERSE ROTATION TURBO ***