i have a 93 z28 and i wanted to get new headers from summit, i have decided to get hooker headers. My question is will i need anything extra when installing these ? i have heard i might need to get a new knock sensor, is this true ? what will i need to properly install these

 

i'm not sure about the knock sensor ... i just posted to get you question back up on todays post . lol. good luck. sick

 

its ok thanks sick, whats the difference between getting painted headers or coated headers ? is there a performance gain there or is it just for looks ?

 

Keeps the heat in the headers and lowers the engine compartment temp. Not much but it happens. Not worth it my opinion.

 

will 3" fit or should i go with 2.5", what is the stock size ?