Summit Racing has Magna flow Catalytic converters.
Not sure if your state will allow them...
We've used Magnaflow products on various custom projects. The last one was putting a 1UZ motor in a 1993 4 Runner. Sound is great.

__________________
2001 x5 3.0 (sold with broken motor), 1990 e30 M3, 1991 318is, 2002 325i, 2008 335i Dinan stage 3 6 speed,