Just had JBA headers and Magnaflow Catback installed. The header/ catback combination added noticeable "seat of the pants" performance even without a chip. If I lost any low end torque, I cannot tell. There's certainly more grunt at midrange, between 45-60 MPH. However, at the low end with wide-open throttle, I noticed the RPMs now jump past 5000 whereas before, I don't recall it running much past 3000 RPMs. I guess I am mod'ed out now unless I add a custom chip. I have a micro tuner but recall reading somewhere that it is not compatible with any mods that affects engine tuning such as headers. I will probably get a custom chip in time but will just drive as is because if I add anything else, it will be a blower and require a different chip for that. My 4.6 is not the same

 

where's the this thread is worthless without pic's guy at????.........insert now>>>>>>>

 

Prolly cause he can't post pics yet...

Hell with the pics, I wan't audio of WOT as his transmission changes gears at 5000 RPM.

 

lets get a sound clip if ya dont mind......