Investment Cast Stainless 321SS 3 into 1 shallow angle turbo merge collector for building 20B 3 rotor & 13B-MSP Rx8 turbo manifolds. These are designed to work with 1.5" schedule 10 pipe between the engine flange and collector, and 2.5" schedule 10 pipe between the collector and turbo flange( vband or T4 flange). This size tubing has been prove well past 1000rwhp on 20B applications and is most preferred for a street driven, autoX, or roadcourse driven applications.
