Looking to buy a new Headers and a Mass.
Truck setup:
2004 new body 4.6L V8
Intake Airforce 1
Catback Borla

Suggestions please i know squat about headers and masses. Like Gibson only has 5.4L headers listed.. will those fit? stuff like that.

 

Have you tried Summit? They have parts for everything... I bought their house brand headers (made by pacesetter) non coated because cost was an issue for me, they seem to be performing fine, however I suspect they are leaking at the flanges, which may be my own fault because during the install I only siliconed the gasket to the header and installed them to the heads dry. The other problem I had was that the EGR mounting boss didnt line up with the EGR tube, so had to heat and re-bend the tube to get it in place. Other problems I found were all header design vs. OE, but sometimes you have to sacrifice OE design for perfomance..... Original point is though, Summit has your headers pretty much every manufacturer too....