Hey guys, have a Supercrew 07 4.6 with flowmaster cat-back DO rear exit with super 40 muffler, HOW can i make this thing wake up now? noticed a difference in power but need more....

Any suggestions on brands of CAI or Tuners?

 

You have some great options on here,
and welcome to the site

 

i believe af1 makes the best cai's for your motor. troyer or edge tuners are a very good pick. underdrive pullies help a little bit. you can get them through troyer. http://www.troyerperformance.com/cgi...rive%20Pulleys .
flowmaster mufflers have been known to take away power and mpg for the modular motors. i'm pretty sure you can turbocharge a 4.6. e-fans, ported and polished heads are good for alot of power and sometimes give better mpg. there is so much you can do but i cant think of everything to list. long tube headers make a difference in hp and torque. short tube headers do nothing number wise.