the past 2 cars that ive pulled tunes on, one was a regal gs the other was a gtp. Both zzp pcm's, both knocking more than 6*, both way different. When i was looking through them, they weren't the most well thought out canned tunes. I'm not singling them out, the intense pcm i had in my car was pretty ****ty but, safe enough to get by on, even with my L32/67 top end.

when you buy an over the counter tune, its pot luck, hit or miss, go or blow, lean and mean or fat and shat.