Quote:
Originally Posted by norcalpb
I think that vented oem sway bar mounting bracket trim piece is to provide cooling for the secondary cat. The gr86 also has a new NACA duct on the skid plate that I believe is for cooling the primary cat. I’m thinking it’s all emission related but could be wrong.
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That makes sense, now that I read the OP's post more clearly it seems like they thought it was for the bushing but later realized it's for the cat. Will cross that one off the list :-)