
Professional Products' Power-Plus...

Professional Products' Power-Plus Typhoon sells for under $700 (polished) and $600 with a natural finish. It worked well for us and might just be the perfect part for your SOHC 4.6-liter engine. Notice the small bosses cast into each port so you can adapt nitrous easily.

The Typhoon is a three-piece...

The Typhoon is a three-piece manifold, but is installed as one complete unit. Its runners are 1 5/8 inches shorter than stock and a bit larger, too.
It has taken some time, but hard-core parts for the Two-Valve 4.6 are rolling in. Sure, there are blower kits, cams, and a few strokers on the market, but amazingly, until now there was a limited amount of hard-core engine components. The modular engine has been in service for well over a decade, yet there are still no aftermarket heads and only a few intakes from which to choose. Of the available intakes, most are designed for racing or serious 600hp-plus applications, with short runners and non-stock throttle-body locations. But that has changed with the introduction of the Power-Plus Typhoon, a real-world aftermarket replacement intake for the 4.6 Two-Valve engine.
Fashioned in aluminum, the Typhoon directly replaces the stock plastic manifold on all '99-'04 GTs. It's designed with performance in mind, but is suited to many of the Mustangs on the street, rather than the all-out race models. "We designed this manifold for the street-performance person," says Jim Davis, chief operating officer of Professional Products. "It's not a race manifold, but it will work really well in most performance applications."
To the naked eye, the Typhoon doesn't look much different than stock, as it mimics the factory design with a top opening that feeds a lower plenum, and runners that sweep from the plenum up and over to ports on the opposite side of the engine. The Typhoon does, however, feature a larger plenum area, larger ports, and shorter runners to promote better breathing. And even though it's aluminum, it weighs only 11 pounds more than the plastic version it will likely replace on your engine.
Anderson Ford had its hand in the design, so you know there will be power in there. While final pricing is yet to be determined, Davis says polished versions should retail for under $700, while non-polished models will go for about $560. "We've been working on this manifold for close to two years with Anderson Ford," he says. "The prototype was plastic and hard to duplicate. We had to redo the actual CAD/CAM drawing, making necessary changes to incorporate all that Anderson wanted in the design."

Prior to the install, Scott...

Prior to the install, Scott Parker's '99 GT featured a K&N filter with silencer removed, a Ben Alameda-ported upper plenum, an MRT stainless H-pipe with high-flow cats, and a bunch of suspension and brake upgrades. It made a best of 236 hp on the Dynojet at Crazy Horse Racing.

Installation of the manifold...

Installation of the manifold is straightforward. We began by removing the inlet elbow and the upper plenum. We also drained the coolant from the radiator.