Thermal R&D Universal 100
2.5 Inch centered inlet/outlet pics below...Second one just shows manufacturer.
http://www.picjar.com/pub/0320SVT/Hatch_Pic/mikeyshatch047.jpg/
http://www.picjar.com/pub/0320SVT/Hatch_Pic/mikeyshatch049.jpg/
http://www.picjar.com/pub/0320SVT/Hatch_Pic/mikeyshatch047.jpg/
http://www.picjar.com/pub/0320SVT/Hatch_Pic/mikeyshatch049.jpg/