Breather design is O-ringed at the heads, passes through the backing plate and exits inside the mouth of the throttle body through proprietary shooter tubesAir cleaner cover is forged and CNC-machined into a angled shape for excellent leg roomIntegrated polycarbonate top is coated for long-term durabilityPerformance air filter is made from black synthetic material wrapped in stainless steel meshFilter is washable and water-resistant