2003-2004 Toyota Corolla 1.8L Polished Dyno-Tuned Cold Air Intake (INJRD2081P)Description RD Series dyno tuned cold air intake for the 2003 2004 Toyota Corolla 1. 8L. The mandrel bent 6061 T6 aluminum tube reaches deep into the engine bay to collect cool, dense air while maintaining safe air fuel ratios, adding bolt on power and an aggressive tone. Features Mandrel bent 6061 T6 aluminum intake tube Serviceable SuperNano Web dry air filter Maintains safe air fuel ratios throughout the powerband Polished finish Aggressive throaty