As someone else has said, you would have to get a custom cat (like SMSP) to mate the header to the USDM exhaust.

You would be sacrificing the power that you could be getting, but you will still definitely feel the difference by adding a JDM OEM header to your USDM exhaust.

You will not harm the motor in any way.

 

As you can see in this picture I have added, I am using the jdm4-1, SMStestpipe and SMSbottle neck adapter, and I can say that still using the stock B-pipe and the stock muffler I can deffinately feel the gain in power.




Worthy addition to any R.

 

nice pic bbasso. looks clean

 

thanks.

And the car is still quiet, almost like stock at wot, just some more heavy breathing going on...

At idle you would never know the has been modifcations to the exhaust, well maybe your noise would itch from the fumes

 

so the mugen exhaust is jdm length. I would have to cut and weld the exhaust to my cat, or waht. I want to get it for wutocross but i want to stay DS so i cannot modify my cat.