Product Description: 4Pcs Intake Manifold Set – Fits Honda CB400 Super Four / CBR250 MC22 / NC19

This set includes four intake manifolds (carburetor boots / isolators). Stock number: P091-XT010. OEM references: 16211-KY1-000 and 16211-KAZ-000.

Construction
Each manifold is molded from fuel-resistant rubber with internal fabric reinforcement. The material withstands engine heat and prevents cracking. The flange surface is flat with pre-drilled bolt holes matching Honda cylinder head intake ports. The inner bore is smooth for unrestricted air-fuel flow. The carburetor side features a stepped lip for secure clamp retention.

Fitment Information
This 4-piece set fits Honda CB400 Super Four (CB400S), CBR250 MC22, and NC23/NC29? Actually given NC19? It says NC19 – typically NC19 is CBR250R (MC19?) but we'll follow listing: CB400S, CBR250 MC22, NC19. These are inline-four cylinder engines. Each manifold connects one carburetor to one cylinder. The set provides all four boots for a complete replacement.

Direct Replacement Use
Use this set to replace original manifolds that have hardened, cracked, or developed vacuum leaks. New manifolds restore proper sealing between carburetors and cylinder head. This improves idle stability, throttle response, and fuel distribution.

Installation Note
Remove the carburetor bank. Replace all four manifolds simultaneously. Clean cylinder head mating surfaces. Install with new gaskets if required. Torque flange bolts evenly.