Im getting a new single exhaust, but i need to know what are the inlet size of the mufflers..

like J's racing 70rr/Invidia N1 it doesnt say anything about its muffler inlet. is it the same as the piping 70mm inlet?

 

^ it should be the same otherwise its not a true 70mm exhaust. My ASM is 70mm from cat to Muffler and thru a lsightly larger tip (at least it seems to be a little larger, never measured it though)

 

t1r is 70 all the way as well

 

invidia is 70 mm to the split then 63.5