I own a TRD exhaust myself, but I was wondering if anyone knew how loud the HKS exhaust compare to the TRD exhaust? Recently I took out my tsudo midpipe and I was wondering if the HKS exhaust is louder than the TRD + midpipe.

I was also wondering if the HKS exhaust passes the smog check in California? I know HKS and TRD are both axle back, so I assume the HKS exhaust will pass the smog check? No intakes or anything. Do cops pull over people for running an HKS exhaust as well?

I looked at other posts, but I was hoping for an updated thread. Thank you guys!