The ECM needs to know that is installed. You need to reprogram it so the computer can take advantage of the extra air coming in. That's another additional expense, and usually not a cheap one. And then it's like if you're going to do that, you might as well install a cat-back exhaust to go with it to complete the process. Do they have bigger throttle bodies for that vehicle, too? That wouldn't hurt. I haven't done those mods in eons. But I remember having to use a programmer. Once it was all done, WOW! What a difference. GM was suffocating that engine from the factory.