[MagnaflowRep]

EGT drops

Running a 4" system you can see an adverage of about 250 degrees compared to a stock system. Because most diesel truck owners are running some sort of programer on your vehicle the EGT numbers might be less than of a stock vehicle.

 

[mnnmaz]

Its a waste of money IMO. Take out/gut the cat and your just at good as a 4" trust me I did it on my 05 LLY. I then sold the 4" for the same price and saved me some $ that can be used elsewhere (diamond eye down pipe) and 2 two tanks of diesel.

With the 4" i gained 1 mpg hand calculated egt drop 250*
With the 3.5 stock with cat removed, gained 1 mpg hand calculated egt drop 200*
With the 3.5 stock with cat removed, diamond eye down pipe, gained 1.7 mpg hand calculated egt 240*

 

[John Peterr]

i think it lifts the fuel efficiency and smoothens the sound.

 

[cruzerjosh]

i just put a 5" straight pipe on 2 days ago from my fully stock exhaust. since you have an lb7 i can def tell you its a world of difference, and way loader . but i dont know what the stock system is like without the cat and muffler either

 

[nvrupnvrin]

My 4" turbo back has been great ! Great sound also

 

[lddrew]

how restrictive is the stock muffler in all actuality??

 

[RedBowTies88]

not as restrictive as the cat ill tell you that much


its not good though, basically just a worthless trashcan under your truck

 

[lddrew]

thanks beech, i've got an ingenious plan up my sleeve