" K&N Cold Air Intake Kit: High Performance, Guaranteed to Increase Horsepower: 50-State Legal: 1994-1997 OPEL/VAUXHALL (Calibra)57-0087-2 Ultimate Longevity: 10-Year/Million Mile Limited Warranty protects for the life of your vehicle. Guaranteed Increase in Horsepower: Dyno-tested with up to 50% more airflow than restrictive factory box air filter and intake tube Better Towing: Improves acceleration and uphill performance when towing by improving throttle response. Improved Engine Sound: Hear the power under the hood. World Class Protection: Pushing the limits of engine protection by protecting your engine from harmful contaminants Easy Maintenance: No filter cleaning required for up to 100,000 miles Easy to Install: Bolt-on power in less than an hour with basic hand tools. K&N air intake systems are one of the easiest ways to guarantee an increase in horsepower. Dyno Tested: Dyno-tested for a guaranteed increase in horsepower and acceleration with no ECU tune required High Quality "