Now that we're well into the third year of production for the S197 Mustang, the aftermarket and legions of owners have had plenty of time to figure out that these cars respond quite well to bolt-on upgrades. Better, in fact, than probably any previous Mustang generation.
Not one to be left behind in the evolution of 4.6 Mustang development, BBK Performance Parts has been right there every step of the way. This is evident by the impressive results we achieved last year when installing a few BBK bolt-on bits on an '05 GT.
In a nutshell, BBK's throttle body, cold-air kit, and underdrive pulleys netted a 30hp gain over the car's baseline, and keep in mind that this was at the rear wheels, not at the flywheel. At the flywheel, call it nearly 50 hp. Not bad for a few hours work and about $1,000 in parts and installation labor-even less if you do the installation work yourself.
This time we're turning our attention to the exhaust side of engine breathing by installing BBK's new shorty headers for the three-valve, 4.6-powered Mustang GT. The results are a worthwhile step on the path to more bolt-on power.
Note that we only installed and tested the headers themselves. This includes the '06 GT test car's stock mufflers and H-pipe. Combine the headers with BBK's soon-to-be-released crossover pipe and the other above-mentioned items, and more than 300 hp at the wheels will easily be the result. It's a setup we look forward to doing, and we intend to pass on the results when a BBK test car is complete.