1999 Mustang Two-Valve Bolt-Ons - Preparation HP

Band clamps secure the flow tubes and tailpipes to the muffler and tips.

The BBK Performance cold-air induction system was a no-brainer given the company's reputation for quality and performance. The polished and chromed intake tube will make a handsome addition to Gangsta's engine bay in addition to the horsepower it's sure to gain by relocating the air filter to the fenderwell.

The stock airbox and intake tract was removed with an 8mm socket and a flathead screwdriver, while the IAT sensor and IAC hose must be unhooked by hand.

Caveat emptor-some assembly is required. The stock MAF needs to be separated from the stock intake and transferred over (with a 14mm wrench) as well as the rubber grommets.

The supplied band clamps were tightened down over the rubber hose, and the IAT and IAC were reconnected.

The last step was to feed the air filter into the fenderwell from the bottom, under the bumper.

To dial in the air/fuel and timing for the intake and exhaust upgrades, we had DiabloSport send over one of its Predator handheld tuners. At least a few ponies should be in the cards by switching from the conservative factory 87-octane tune to a raunchy 93-octane tune.

Radical Racing is not only a dealer for DiabloSport, but Craig Radovich has also tuned many Mustangs on his in-house Dynojet with the little green devil. The wideband on the Dynojet showed a straight 13.0:1 AFR, which indicated the Predator base tune was dead-on. However, the timing needed to be backed out by 1½ degrees due to a little "rattle" on the top end. Gangsta picked up a little over 6 hp, but the real story was told at the track.