Hey guys, i have a few questions... (i have a 2005 cobalt LS)

1. what are the best cams to buy (stage one or two)

2. and if i do, do i need to replace my valves and springs?

3. i want to run a catless DP .. how, or where can i get my PCM tuned so it doesnt throw a Engine light?

4. i plan on adding a 2.4 intake mani, 42lb/hr inj. but as for a throttle body is a 62mm bored out one better or is a 2.4 TB better?


thanks guys

 

First thing I wanna say is search... but I will answer one question

Number 3 would be Clear Image/Trifecta Tuning.

 

1. stage 1 is supposed to be better for daily driving.
4. the 2.4 throttle body is larger (i think).

 

If my mind serves me right the 2.4 is a 66mm tb.