Mishimoto 02-07 WRXAnd STI silicone MAF hoses combine high grade silicone with 330°F heat-resistant embedded fibers to handle high temperatures and additional increased intake air velocity. Each hose has a smooth interior surface to deliver increased airflow to the turbocharger. Mishimoto uses four hand-wrapped layers of silicone fortified with heat resistant fibers in all of their high performance MAF hoses, ensuring a lifetime of durable performance. Mishimoto Subaru WRXAnd STI silicone MAF hoses are engineered for a direct OEM replacement fit. The hoses are available in black, blue and red to customize the style of your engine bay as you upgrade performance.