I dynoed my car and came away with 335 RWHP and 350 RWTQ. with just the cat back, lid, free mods, and K&N. I was happy so I much HP should I get from the following
Dynotech Headers
Thunder Racing Cam
Heads
Tuning
?
I want to turn 500 at the wheels without a power adder if I can if so what else do I need

 

You will be in the low 400 with those mods. Going to take a lot to get 500, not a very realistic goal on a 346ci unless you spend big $$$ on the setup.