I need some people's opinions on exhausts. I'm up to the exhaust stage on my KE70 4AGE conversion; I was thinking of modifying the 2", press bent, under diff exhaust that came with the car when it had a 4K. The exhaust only has one shitty muffler and two 3" "drift pipes" and it was pretty loud when the 4K was still in there.
Now what I want to know is: will my car fail an engineering certificate/roadworthy check if I don't install a catalytic converter? And would it be best to ditch the shitty muffler and run a hotdog/resonator, or should I have both a muffler and resonator?
I should add that I want to keep the car quiet so it doesn't attract attention from police or flatcap douchebags, but I don't want to lose a stack of power in doing so. Also the engine is completely stock except for the 4-2-1 headers.
What exhaust setups are you running and how loud is it?
Edit: would I be better off going up to a 2.25" exhaust?