i wanna put an AMS intake system, but i'm worried it will set off my service engine light. i also have found a down pipe which i have yet to recieve, will this set off the engine light? i also wanted to know with every part i switch out do i have to take it to a dyno to reprogram the ecu? should i change out everything one time then take it to get dynoed, or after every part? need some help. Thanx

 

intake shouldn't, you might have to disconnect the battery at most.
The downpipe might. But you can fix that.
Put everything on then tune it.