Exhaust

5.4 2007 f150 flowmasters installed and if I cut the cats off any opinions on how good or bad will it sound??

 

if you cut the cattts out, and keep the flows on there, there will be more exaust flow goin through your muffler, basically youll here a more true sound of the muffler,it will sound agressive, just make sure you have the 02 senscors in your pipe

 

So I heard if I just cut the rear cats it will sound great true ??

 

yes

 

it will sound better, you will have more exaust flowing through your mufflers , and they will sound better, just do it

 

i say leave the cats

 

You'll get a heavy raw fuel smell inside the truck and your check engine light will come on. U'll need to get MIL eliminators for the rear oxygen sensors. Just get high flow cats

 

i took off all 4 catts and i havent had my engine light come on, and its been over a year

 

it will sound better but i wouldnt want fuel fumes in my cab...

 

Yep it makes it smell like a old ass truck. Mine stinks bad