Aftermarket Exhaust System Upgrades

[rpm427]

The small pipe gives back pressure and Ford aimed to make these trucks last along with giving them low end torque but most of the XLT type trucks got a 4.10 gear so no real need for the low end.These exhaust add fuel mileage as well as performance and that's the real need for most of us.As I stated earlier it really woke mine up and sure am glad I did it.Now we all need to change the cross over underneath for a total package and I plan on getting mine done.The stock pipe is junk and mandrel bent is the way to go!

 

[Darrin Tosh]

Just the sound difference from 3.5" to a 4" system is worth getting the 4"!

 

[Diesel Max]

Just the sound difference from 3.5" to a 4" system is worth getting the 4"!

Is sound the only difference between 3.5 to 4 inch ?? Or are there HP or lower EGT's to be gained going to a 4" ??

 

[pennsylvaniabo]

we own an exhaust shop so there is really no difference for me between th 4" and 5" other than 1 more bell flange and the ability to run 6" tip so what are ppl's votes?

 

[Darrin Tosh]

Is sound the only difference between 3.5 to 4 inch ?? Or are there HP or lower EGT's to be gained going to a 4" ??

HP and EGT differences were negligible, but the sound was much better!