Today I was out in the "other" cobra, and on my way to best buy I encountered an LS1 Z28. A couple of looks and a few revs later we did a quick pull from about 40 to about 110. From the get go I pulled maybe a 1/2 car, then he evened it up and pulled about 1/2 car by the end. Sound like he had at least a catback. Judging from the result, I would say he had a lid too I don't know...but stockish either way. I gave him a thumbs up, and then got pissed at myself because I ended up passing my exit for a stupid race...cool story amiright bro?
BTW the "other" cobra is a 99 with 60k miles full exhaust, cai, udp's, and a bama tune.