I have a 93 z28 with the m6. No mods at all completly stock. What would my 1/4 mile time be roughly and the mph. If I added CAI and A cat back would times go up if so what would they be around. Car has 64k miles on it and runs real strong. Thanks

 

anywhere from 13.9ish to 20.0 @ 60-103 depending on how well you can drive. Try to get your 60fts under 2.2 if possible, most likely though they will be at 2.2 and up. With catback and CAI you should be guaranteed around a 13.8 or 9 maybe better, with good driving of course.