Intake Manifold Boot Set for Yamaha XS400 (1977-1982) | OEM 2A2-13586-00 & 2A2-13596-00

Product Overview

Restore the smooth, synchronized power of your vintage Yamaha twin with this premium Intake Manifold Boot Set. Specifically designed for the 1977–1982 XS400, this set includes both the left and right interfaces, replacing OEM parts #2A2-13586-00 and #2A2-13596-00. Old XS400 boots are notorious for cracking and causing "vacuum leaks," which lead to high idling, engine overheating, and poor throttle response. Our replacements feature an upgraded thickened wall design to provide superior durability and a permanent airtight seal.

Product Compatibility

Direct replacement for Yamaha 400cc Parallel-Twin engines. Please verify your model and year.

Brand	Model	Fitment Years	Replaces OEM Part #
Yamaha	XS400	1977 – 1982	2A2-13586-00 (Left)
Yamaha	XS400	1977 – 1982	2A2-13596-00 (Right)
Yamaha	XS400S Special	1980 – 1982	2A2-13586 / 2A2-13596
Yamaha	XS400 Heritage	1982	2A2-13586 / 2A2-13596

Specifications

Feature	Detail
OEM References	2A2-13586-00 / 2A2-13596-00
Quantity	2 Pieces (Complete Left & Right Pair)
Material	Reinforced High-Density Rubber & Anti-Corrosion Alloy
Design	Upgraded Thickened Pipe Wall
Fitment Type	Direct Bolt-on Replacement

Key Features

• Upgraded Thickened Wall: Features a reinforced pipe wall construction that offers significantly better resistance to thermal expansion and collapsing under high vacuum pressure compared to standard aftermarket parts.
• Superior Shock Absorption: The specialized rubber compound is engineered to absorb engine tremors and high-frequency vibrations, protecting your carburetors and ensuring a stable fuel charge.
• Complete Performance Restoration: Eliminates air leaks that cause "lean-running" conditions, fixing symptoms like backfiring, hanging idle, and hard cold starts.
• Corrosion & Fuel Resistant: Manufactured from high-quality materials that resist degradation from gasoline, engine oil, and modern ethanol additives, preventing dry-rot and cracking.
• Perfect Twin-Cylinder Balance: Includes both manifolds to ensure both cylinders are sealed with identical pressure, allowing for easier carburetor synchronization and smoother engine operation.