No problem...install was not too difficult, pretty straight forward. My car is purely a track car so I went with Fabspeed's Supercup exhaust which is catless. CEL light is on but it's been on for other things already like when I removed the airbags, so that doesn't bother me. I haven't had it on track yet since the install but I can tell just driving around the hood that there is definitely a horsepower gain not mention an unbelievable sound. Hope this helps!