Yes it will throw a code. Yes you will notice a drop in gas-mileage.
It will greatly clean up the engine bay, and keep the lower intake cleaner.
ill be doin this prob on my car sometime this week but a penny and copper rtv sealant
Just saying, theya are nice. Good and clean for the guys that want that look.
Ever see a ZZP block off plate. Geezus.. I'd be ashamed to charge that much for a piece of aluminum. The Milzy one is clearly machined nice and well thought out.