SPECTRE AIR FILTERSMore Air = More PowerReplacing your stock filter with a Speed by Spectre hpR™ filter will result in real power gains. The hpR™ filter material allows air to flow easily to the engine, resulting in better combustion and a more efficient use of fuel.Saves Gas / Ultra EfficientBetter air flow translates to better fuel economy. Government studies show that an efficient air filter can give you up to 10% better fuel economy, which translate to money in your pocket. But flow is without benefit if you sacrifice filtration itself, exposing your engine to harmful particles. All Speed by Spectre filters are tested at independent labs using ISO 5011 standards and have been proven to filter 99.6% of particles.Lifetime WarrantyEvery Speed by Spectre hpR™ filter is proud to feature a lifetime warranty – because we believe you should only have to buy one.