Just had a cat back Milteck exhaust system put on my 05 R53. Love the system and the car runs great but, the next day after install, it thew the check engine light. Anybody experiance this? Hopefully the computer just needs to be reset and then "learn" the new exhaust system. Car has 46K miles if thats any help. Prior to having this system installed, I had a one ball mod for about 25k miles. That never threw a check eng light. Fustrated

 

Find out what code it threw

 

Do you notice a big difference between the 1 ball and Milteck?

 

Get it up on a lift and check the wires for the O2's sensors, esp the one after the cat.

Huge difference between a free flow exhast and the "one ball mod". There is no comparison.

 

Agreed =gRay rAvEn=, I think what I noticed first was the increase in torque. It really pulls hard. Like the old saying, torque gets you going, horse power keeps ypu going. Fairly quiet with a nice deep rumble at idle and low speeds but, put the right foot down and wow what a wake up call. I am real pleased with it. Thanks for the tip on the O2 wires. Do you know if it will still need to be re-set/cleared?