What Apex Chase said it so true. If you could just ride along in an L99 car that someone has swapped the stock exhaust and has no tune, that would be the best. I know the Corsa makes the system 14952 for the L99. That was the first mod I did. Well it did not work as far as hiding the AFM noises. Maybe every car is going to sound different, maybe noises that bother me will not bother someone else. I am very particular when it comes to my vechicles running and sounding just right. If I had to do it over again, and I know what I know now, and was dead set on No Tune. I would leave the stock exhaust alone. That's just me. One guy's experience and opinion.
