Power Pack Intakes
In 2008, Aston Martin introduced an up-rated version of the V8 Vantage called the N400. The limited-edition car featured the same 4.3L V8 as the standard car, but put out 400 hp (hence the name) and 310 lb-ft. The additional 20 hp and 8 lb-ft came from new airboxes and a revised engine tune. The N400 intake and tune package was later offered as a dealer retrofit to all 4.3L V8 Vantages - this was called the Aston Martin Power Pack. The modest bump in power output came with a hefty price: around $5000, installed. The package was re-used again with the introduction of the V8 Vantage S, this time bumping the 4.7L engine's power from 420 hp to 430 and from 350 lb-ft to 361 lb-ft. The same configuration is used on the V8 Vantage GT, which carries over those (and other) components from the V8 Vantage S.
To set the engines apart visually, the N400 introduced the black intake manifold to replace the standard grey one. The airboxes are hidden in the car, so this is the quickest and easiest way to determine if a car has the Power Pack.
The black intake manifold is structurally the same as the standard grey one except for one key difference: The black one has an additional nipple added to fit a vacuum line. You can see the nipple in the picture above, it's immediately behind the throttle body on the right side. The vacuum line follows the intake ducting toward the front of the car and splits in a Y-fitting to continue to each of the two airboxes.
The main physical component of the Power Pack, these airboxes are fitted with extra flaps to allow in additional air, along with the solenoids to control those flaps.
The picture above shows the additional flap in the airbox. These flaps open up at 5500 rpm, giving you the biggest boost in power at the top of the rev range.
Each airbox uses a solenoid to control the flaps, shown attached to the airbox in the picture above.
A new fuse box is also included. It is wired and fitted for additional fuses for the solenoids that have been added to the airboxes.
And, lastly, a new tune ensures the engine stays happy with the extra airflow.