I spoke with my contact at MagnaFlow and he stated that on the Catalytic Converter # MF91004, the 2 inch inlet/outlet measurement is the internal diameter of the pipes.
If you can tell me the year, make, and model of the vehicle, there may be several catalytic converters that will fit, some custom fit and some universal. view full answer...
I spoke with my contact at MagnaFlow to find the length from flange-to-flange of the Stainless Steel Catalytic Converter, Direct-Fit # MG23387. The length of this catalytic converter is 25.9 inches.
I have attached a photo showing this measurement for you.
This catalytic converter is designed to fit the 1988-1989 Ford Bronco II with 2.9L V6 Engine and the 1988 Ford Ranger with 2.9 L V6 Engine. view full answer...
I confirmed with my contact at MagnaFlow that the measurements of the inlet and outlet diameter of the MagnaFlow Stainless Steel Catalytic Converter - Direct-Fit # MF93441 are both 3". The converter is confirmed to fit your 1991 Corvette (5.7L V8 Engine - excluding ZR-1). view full answer...