I guess they dont make headers for I-6's huh? well, if you, or someone you know is handy with a welder, you could order a 'make your own' header kit and jimmy rig one up for a straight six. plus it would give you some bragging rights!
check headman headers or clifford ,PAW might also have various listings on the 300 cid motors that come in the f-150's ,friend of mine has the flowmaster cat-back thunder series and it sure made a difference,good luck.
Know the answer? Join free to reply. This community has answered Ford questions for 25 years, and threads like this one stay up to help the next owner.Join free