Being from Jersey I had to be concerned about emissions as well. I went with the Motorsport 1-5/8" unequals, a MAC hi-flo H-pipe (w/cats), and DynoMax UltraFlo catback. I changed everything at the same time rather than putting stuff on and taking it back off later. Removing the stock H-pipe wasn't to terrible and I bought new O2 sensors for the hi-flo H-pipe. The factory H-pipe is a bit cumbersome and I put 2X4's under it before I fully loosened it just as a precaution since I was working alone under the car which I had up on jackstands. The MAC H-pipe was easy to put in because its actually two separate pieces that get clamped together at the crossover (H) portion. I found that the DynoMax setup fit well also and the pipes lined up well. All in all its worth the effort for the sound and the Performance!
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