I have an 08 F150 SCREW with 5.4 V8 I added a K&N intake and Superchip Cortex... In the summer I pull a large Travel trailer so i am trying to decide what my next upgrade needs to be.. I am thinking of iether moving from 3.55 gears to 4.10 or higher or upgrading the exhaust and maybe adding header.. all just to give me that little extra for towing.. what I don't do this year I will do next year just thought I'd see what you guys think should be next.. Exhaust or gears...

 

I dont have them yet but I would go with gears because they're bad ***. But exhaust would really open up your intake and chip. (if not then especially after a custom tune)

 

If you're towing that big trailer then def get gears not exhaust.

 

gears will help the towing alot to get you moving off a stop exhuast will just make it sound better n not really help at all with towing

 

The reason I was considering the exhaust is because of the gains in HP but it sounds like the gears are the best bet then maybe add the exhaust later... Having said that is it worthwhile going bigger than 4.10 gears?

 

Some wheels that I happen to be selling?

 

Gears! 4.11 Yukons would make a world of difference without destroying your mpg's. You may even see an increase in the city. Exhaust is always nice but keep in mind that the hp gains are typically at peak rpm. 20hp is great and would help but when you have to exceed 4500rpm's to gain that it's not really pratical for towing. Gears first exhaust later. www.diffsonly.com visit there site then contact Wayne via email or phone and he will set you up with what you need and an awesome price. I got Yukons and the Yukon rebuild kit for the rear for $310. Tell Wayne Jason sent you!