I have a jdm d15 headers and was wondering if the jdm headers were any better than usdm headers including aftermarket ones (megan etc.) I also had a problem with the o2 sensor plugs being different to that of the usdm headers. If not i'll throw my megan headers on because the jdm headers are making me throw a CEL. Could I switch the o2 plugs off the usdm header and just crimp it to the jdm header?

Would having the o2 sensor not hooked up to the headers cause vtec to be disabled?

 

there is no such thing jdm is better than usdm on oem headers. they are the same and what do u mean o2 sensor plugs different ? and did u diy CEL the code? if you running without o2 sensor. you will get bad mpg and car will run rough