My vote goes to the DC2 4-1 header and it's relevant piping down to the original DC2 muffler. Not too much noise, good power, and finally not too expensive for those on a budget.bajarian said:hi bros. wanna check some thing with you guys, b16a engine goes well with which jdm exhaust system including extractor)? dc2r or ek9( are they different?) or you guys rather stick with the stock system?