^ Proper way to do it on a budget.
But 90% of people see it as SLP/ZZP headers that are $800 by themselves, and ZZP says that headers aren't needed until you are cammed, with Stage 2/3 heads, a FWI, tuned PCM, rockers, 3.2/3.3 pulley, and whatever else the Stage 4/5 kits are for a couple grand.
They say a stock car should run fine on their base tune, with a 3.5 pulley and a K&N drop in filter, colder plugs, and u-bend delete pipe.
Drop to a 3.4 with just a downpipe, and a CAI kit plus the above. And they throw in a new belt... for $615 +S&H, assuming you send in your PCM first and don't drive the car until you get it back and everything put on.
This is why we have problems. People say but this guy says you can do it this way, we say different, we don't like rebuilding motors, that's money in ZZPs pocket. "Oh, our kit chipped a piston, well you can purchase our rebuild kit at this link and rebuild it and hopefully you won't break it the 2nd time."