Originally Posted by Diesel_Brad
Thanks for the input. JBA was stating a 16hp increase at the same 4872 RPM
As for looks... This truck is used and abused, not polished and pushed so I could care less
I haven't researched this stuff for a long time, but I am pretty sure that the 16 hp number you are quoting is JBA's claim when you add their headers, exhaust and ignition wires. Theoretically if you are gaining 16 hp at 4872 RPM, then you are losing hp elsewhere. Just keep in mind there is no way you will gain 16 hp throughout the powerband.
IMO they ARE an upgrade over stock and I would get them if I was in your situation. Just trying to make sure you understand the facts.