Honda TRX400EX Complete Gasket Kit - Vertex Pistons - Includes Oil Seals - `99-`04. A full gasket and seal package designed to rebuild the top and bottom end components for 1999–2004 TRX400EX engines, supplied with Vertex Pistons-compatible materials.

This kit contains all OEM-specified gaskets, o-rings, and engine oil seals needed for a comprehensive rebuild, plus formed rubber valve cover gaskets. Where applicable, the kit uses MicroPore high-performance interface gasket material for improved sealing characteristics. Note: the mechanical water pump seal is not included. The parts are organized to streamline disassembly and reassembly for enthusiasts performing maintenance, refreshes, or piston upgrades.

Features

• Complete set of OEM-specified gaskets and o-rings for 1999–2004 Honda TRX400EX
• Includes engine oil seals and formed rubber valve cover gaskets
• MicroPore interface gasket material used where applicable
• Compatible with Vertex Pistons installations
• Does not include mechanical water pump seal (buyer must source separately)

If you have questions or need help confirming fitment for your project, call us directly — we’re happy to assist. We offer installation and customization services at both of our locations in Austin, Texas and the Los Angeles, California area. Call: 512-982-9393 (TX) or 562-981-6800 (CA). If you are considering purchasing multiple items, contact us for possible shipping discounts. We install on premises at both locations.

CA Residents: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov