K&N tests have shown an estimated horsepower gain of 12 @ 5086 RPM with K&N's 63-1551 and 57-1551 air intake systems. K&N Engineers were able to get such good horsepower because the original factory airbox and original filter were restrictive, said Heck.
These cold air intakes are rotationally molded polyethylene Intake System uses a conical shaped High-Flow Carbon Top Air Filter RP-4660 that fits into the stock location. The heat shield isolates the filter element from the engine heat. This in turn keeps a cooler air charge going into the engine. A carbon top is used to add to the visual appeal of the PT Cruiser.
It takes less than an hour to install this kit and the lifetime K&N Air Filter performs for up to 100,000 miles before service is required depending on driving conditions.
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