well i couldnt find the post of every ones exhaust set ups, so on that note i was wondering with my currant set up with the headers to high flow cats(2 total left n right) to single 3" down just befor the axle is magna flow muff then split out to dual 2.5. .qwestion is are the high flow cats enough for the truck if i were to remove the muffler and have striat pipe? mainly is it safe on the truck in below 0 degree weather? been seeing stuff on you tube got me thinking ,darn ytube

 

should be fine

 

ya u would be fine. the weather will not change anything. good setup!

 

friend has similar set up works fine

 

I've heard from alot of reputable people that the high flow cats are a complete waste of money. They are no better than the cats that come with the truck. I am next gonna cut my two rear cats and go straight back. I heard you get more hp and better gas mileage. Also, I've been told it doesn't throw a code. If I was you in this economy I wouldn't buy those high flow cats. SAVE YOUR MONEY.

 

i totally agree with buck!

 

it won't do a thing i have a couple friends and one just has a cat on each pipe otherwise it's straight on out and he can start her up just fine in -20 degrees