test pipe ?

[92GSRbholtz]

yes i need some help ima bout to purchase a exhaust but wanna make sure that it bolts dirrectly to the test pipe.. does the piping diamter matter of the exhaust or will that make the flange bigger or smaller where the test pipes bolts up i was thinkin about the yoanka exhaust i have the blackworks test pipe

 

[thenoxus1]

Yonaka cat backs are on back order. You'll generally want to match pipe sizes.