hey all! i am new here and i was wondering what is the biggest tire i can fit under my 03 sierra with the stock 16in rims. i have heard u can fit 33 under w no problems. also thinking about a 2 inch body lift what size could i fit then? also i am thinking about getting some headers. whats your advice. i am looking for some to really make my truck louder. what kind ok intake does everyone have in there truck? let me know and how u like it. thanks the newbie!

 

I put 265-70-16's on mine with no lift. I did level the front. I would go with a 3" body lift. You could probably fit any tire you want with that. As for sound, I would go with a true dual exhaust. I am using Flowmasters. If you want loud, go with Turbos or Black Cats. It will help your gas mileage also. A K&N helps too.

 

I've been hearing lots of good feedbacks regarding Flowmaster. K&N is also a good choice. As far as gm headers, there are lots of choices to choose from. It would really depend on what kind you wanna install to your car and the budget you want to spend on these stuffs.