Ive run the JX Ninja with the OS 2050 and 2060 pipes. I also here it does well with a AE 2035 but havent tried it.
I dont think its one of those engines that really only runs right with one pipe. I think it can be matched with many different pipes to give different powerbands.
Pipes do make a substantial difference on where an engine produces power and because of that sometimes certain pipes dont work well with certain engines and others really shine.
The first JX I had I used the 2060 pipe. It was silky smooth and had seemingly never ending top end. On the newer JX I put my trusty old 2050 pipe on it. It runs like a stump puller now with gobs of power right from the moment I pull the trigger so much so in fact I geared up a tooth. I say the 2060 is smooth and the 2050 is explosive you can choose whatever your looking for
