u/Poof243

Will I need to tune my car if I get headers. I have a maximal performance exhaust with a test pipe and a hps intake. Also what headers do you recommend. I have a 97 SL

Hey I was thinking about doing an egr delete on my 97 SL. Will this throw a CEL and is it even worth it? Ive heard some people say it gives a little more low in power and better gas mileage.