For performence, what AFR heads can fit my 2005 Chevy Silver

For performence, what AFR heads can fit my 2005 Chevy Silverado with a 5.3 engine size?
I've put gibson shorty headers, superchips programmer, K&N intake and its in the procedure of to get a true dual exhaust? im just trynna get as many ponies as I can to keep up with a lightning. happy TO TAKE ideas ALSO?

The 205 cc Mongoose street LS1 heads should work well. exchange the camshaft while you are at it. If you call AFR, they can propose a cam that will work well with their heads. A head and cam change with what you have already done should put you close to Lightning territory. as well, when you do the head / cam exchange, you will be best suited to have your ecm custom programmed by a shop that is familiar with LS1 edit, etc. Hand held programmers do not cut it once you have done som emajor mods.

airflowresearch.com/205_mongoose.phpairflowresearch.com/205_mongoose.php">airflowresearch.com/205_mongo.

put a bottle on it hp injection at the touch of a switch can not beat that

McLaren got it. The 205cc AFR Mongoose heads will fit that thing, and their flow numbers are remarkable. I am hoping to order a set for my 1999 Z28 afterward this year. as well, I agree with his suggestion for the new cam. While they're in there installing the heads, you may also install a new cam for better power numbers. it'll also save you another "Tuning Fee" if you do them both simultaneously.