theres alot of other stuff you need to wory about before you even look at the fast intake. i cant think of a truck on the site that uses that intake now that i think about it.

 

A self-done custom tune, AIRAID intake tube, K&N filter, JET MAF, better plugs and wires, velocity stack, custom flowmaster 70 catback, cutout bottom of stock airbox, and JBA shorty headers got my 03 Avalanche with the 5.3 to 10.6 in the 1/8. I don't think I'm getting much at all out of the MAF, and wouldn't recommend it unless you custom tune to it. Adding a higher stall Trailblazer torque converter and custom ram air setup got me to 10.3. Soon I'll see what a cam can do.

 

https://www.performancetrucks.net/fo...d.php?t=395748

read this then figure out what order to do them in

 

Thanks ,that info helped out!