ok so im looking at headers to get for my 2006 chevy cobalt ss/sc and im extremely confused on how to find out if my car has the SAI. back to the header. some headers such as the vibrant header will not be compatable with the cobalts the have the SAI. so its sortof a big thing ha. i need somebody to help me find out how to see if i have SAI. so if anybody knows please help

 

The SS/SC never had SAI your good to go.
But if you were wondering you'd look for a tube going into the air filter box and going to the exhaust.