I got a 02 trans am Ls1 cam only besides headers,lid, 3600 yank, stock 3.23 gears. I went 12.34 at the track is that good or bad with the mods I have ?

 

MPH is better to estimate horsepower and performance of your drivetrain from. ET is problematic because we didn't see your car run and you could have hooked and booked or spun all the way down the track.

That being said, and not knowing what cam you have, I think you should be very happy with an automatic car with medium level mods running a lower 12 ET. Now get that bad boy to 11.99 or better and you likely wont be back here asking if it's fast.

 

What tire and rim setup?

 

Seems like a decent time, what are your cam specs and what was the mph?