2nd Gen Turbo Straight-Pipe Exhaust on Non-Turbo 13b Engine
 

I have just recently got my hands on another RX7. It is a 1991 Convertible. Elderly owned and garage kept. 55k and super clean. Had a 1986 GXL about 7 years ago but wrecked it. Excited to get this project started. First thing I plan to do is completely redo the intake and exhaust system. Question I have is that when looking for a straight-pipe exhaust is I seem only to find them for the turbo. Wondering if with an aftermarket header for the 13b non-turbo engine, if the straight-pipe exhaust has the same dimensions to fit inline with the header from the non-turbo rather than the turbo down-pipe. Also any suggestions on where to get one for the non-turbo or how to achieve this otherwise.

Turbo exhausts have three bolts and non turbos have two. And a header is only used on a non turbo, Turbocharged vehicles use a downpipe post-turbo.