Sinister Diesel 50 State Stainless Steel Up-Pipes 03-04 Ford 6.0L Powerstroke PF-R4SBC134 And to top it off

And to top it off

OE replacement performance filter will outflow the stock filter by up to 17% for improved horsepower and torque

which in turn will lower exhaust gas temperatures and give you a slight horsepower increase

Sounds like you've got at least one injector in your LLY on its way out

3L Powerstroke valve cover connector

Sinister Diesel 50 State Stainless Steel Up-Pipes 03-04 Ford 6.0L Powerstroke PF-R4SBC134 And to top it offIs your early 6. 0L Powerstroke riddled with exhaust leaks and poor performance? Chances are your up pipes are cracked and leaking. Sinister Diesel has come up with a solution and it's 50 state legal! Replacing your stock Up Pipes should be your first step in building a durable high performance exhaust system. The up pipe bellows are internally sleeved with stainless steel.