I have a 2000 jdm type R that came with a full Mugen sports exhaust system.
the piping from the header to the resenator is 2 1/4 inch and pass the resenator is 2.5 inches all the way to the muffler .
Do u all think the 2 1/4 piping is 2 restrictive :unsure:
Well it came with a full Mugen sports exhaust system which includes 4-1 header,2.5 inch piping,resenator and mugen sports muffler.
Also as a HKS air filter :roll:
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