The 550i is one of the best BMW cars there is at this moment, with its 402HP and V8 twin-turbo. Even so Fostla considered that a suite of improvements was needed and decided to come up with an extensive list of upgrades packed in one single performance package.
The first upgradable targets were the engine, improved with updated electronics and of course the exhaust system, adding ¼ of the original power to the model at hand.
The BMW 550i gains in this way about 170 horses and that for a price under the threshold of $6.000, which is not too shabby when looking at it from the buyer’s perspective.
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