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4" round metalic cat on NG

1.2K views 10 replies 9 participants last post by  mcrowley  
#1 · (Edited)
I descided to change my old (ceramic) burnt cat with new Metalic cat on 3" JT exhaust.
Just wondering if is going to be a problem if i get round cat instead of oval.

need quick advice ....

to make things more clear -> 4" round body with 3" inlet/outlet