[Lococoin]

I just finished installing a 4 inch magnaflow turboback exhaust with straight through muffler on my 2000 superduty 7.3 6 speed. I use it mostly for towing or hauling and am worried about loss of lower end torque.

How much torque on average do you lose with a 4" DP?

I have read that i should have lower EGT's vs a 3.5 inch. Is the loss in torque worth the gain of having lower egt's?

Right now i am regretting going full 4", as I did not realize there would be a change in low end torque.

Any insight would be appreciated.

Thanks!