Is your Camaro manual or automatic? '81 was the first year with computers. Does your car have an O2 sensor?
Just keep in mind that the manual transmission cars do require a little bit of extra work for proper fitment of long-tube headers. Some headers require some trimming on the driver's side lower control arm bracket (not the arm itself).
On the 2nd gen camaros, you can also run into problems if: your body bushings are worn (collectors can hit floor boards), your floor boards are sagging, or if your car's subframe has shifted (probably not the case, but if you car was ever wrecked...). All of those problems can be addressed, but just keep your eyes open.
If you have an O2 sensor, you may have to move it if you go with long-tube headers... I'm not sure on that one...
Some people report problems with their starters (the solenoid gets hot & the car leaves them sitting). My car is running a mini-starter to avoid this. I'm told heat shields can help as well as modifying your setup to use a ford-style starter solenoid (like the early Mustangs used).
Now that I've scared you with all the possible problems, I have long-tubes on my 4 speed 2nd gen with a mini-starter & I am real happy with the performance. :welcome:
