Mishimoto's red silicone intake boot for BMW E90/E92 N52 engines uses five silicone layers and molded steel reinforcement rings to resist collapse under load. It eliminates the stock resonator for a livelier intake and engine tone, fits the stock airbox and single- or three-stage intake manifolds, installs in under an hour, and carries Mishimoto's Lifetime Warranty for persistent leak protection.
Mishimoto BMW E90/E92 w/ N52 Engine Red Silicone Intake Boot