Muffler Gasket by Honda

Honda UTV/ATV & Side by Side Exhaust Gaskets - Available at buywitchdoctors.com

Product Specifications: Genuine OEM Honda Muffler Gasket, Part # 18391-HM8-000.

Keep your machine running like new with a genuine Honda Exhaust Gasket paired with premium maintenance parts from buywitchdoctors.com. Exhaust gaskets seal the joints between the cylinder head, header pipe, and muffler so hot exhaust gases flow out the tailpipe instead of leaking at the connections. A tight seal keeps the engine running smoothly, protects nearby wiring and plastics from heat, and prevents the popping, ticking, and lost power that come with exhaust leaks. Riders replace exhaust gaskets any time the exhaust is removed, after heat cycles and vibration crush or burn the old gasket, or when black soot, ticking noises, or backfiring point to a leak.

Why Choose Genuine OEM Honda Parts?

Choosing original equipment manufacturer (OEM) parts ensures your vehicle maintains its factory-standard performance, reliability, and fuel efficiency. Genuine parts eliminate the guesswork of aftermarket alternatives, offering a seamless integration with your engine's configuration.

• Exact-Fit Design: Matched to Honda's original bolt patterns, sealing surfaces, and dimensions for a leak-resistant fit.
• Factory-Spec Quality: Built to the same standards as the parts installed on your machine at the factory.
• Peace of Mind: Skip the trial and error of universal or aftermarket parts that may not seal or align correctly.

Premium Materials & Precision Engineering

Crafted to strict factory tolerances, these components utilize high-grade alloys and chemical-resistant seals. This specialized engineering withstands harsh off-road vibrations, extreme temperatures, and modern fuel additives, preventing premature wear and leaks. Honda exhaust gaskets are made from heat-resistant materials shaped to the exact port and flange profile, so they compress evenly and hold a tight seal through repeated heat cycles.

Comprehensive Model Fitment (2015-Current)

This genuine OEM part is engineered for a wide range of Honda side-by-side (SxS) and all-terrain vehicles (ATV) built from 2015 to the current model year. Please verify your series matches below:

Utility Task Vehicles (UTVs / Side-by-Sides)

• Pioneer Series: Pioneer 500, Pioneer 520, Pioneer 700, Pioneer 700-4, Pioneer 1000, Pioneer 1000-5, Pioneer 1000-6.
• Talon Series: Talon 1000R, Talon 1000X, Talon 1000X-4 (including Fox Live Valve editions).
  

All-Terrain Vehicles (ATVs)

• FourTrax Foreman: Foreman 500, Foreman 520.
• FourTrax Foreman Rubicon: Rubicon 500, Rubicon 520.
• FourTrax Rancher: Rancher 420 (All variations including DCT and EPS).
• FourTrax Recon: Recon 250.
• FourTrax Rincon / Rubicon: Rincon 680. Rubicon 700
• TRX250X Models: TRX250X Sportrax Models.
• TRX90X Models: Youth Sportrax Models.
  

⚠️ IMPORTANT DISCLAIMER: Fitment can vary by production date and sub-model trim. Always verify your exact original equipment part number from your vehicle's schematic or consult a certified technician before finalizing your purchase to guarantee flawless compatibility.

Other Popular Parts & Secondary Accessories

• Gasket Maker & Epoxy: Gasket makers and epoxies seal and repair joints, threads, and small cracks where a formed gasket isn't used. Check your Honda service manual before adding any sealant to an exhaust joint, since many exhaust gaskets are designed to be installed clean and dry.
• Exhaust Heat Wrap: Exhaust heat wrap insulates header pipes to keep heat away from nearby plastics, wiring, and riders. Install your new exhaust gaskets first, then wrap the pipes once you've confirmed the joints are sealed.
• OEM Muffler & Exhaust Pipes: Genuine Honda mufflers and exhaust pipes route exhaust gases away from the engine while keeping sound and back pressure at factory levels. Always install new exhaust gaskets when you replace a pipe or muffler so every joint seals properly.
• Muffler Packing: Muffler packing is the sound-absorbing material inside repackable mufflers that keeps exhaust noise under control. If you're removing the muffler to repack it, replace the gasket at that joint before reinstalling.
• Heavy Duty Exhaust Clamps: Heavy duty exhaust clamps lock pipe joints together so they stay sealed under vibration. Pair them with fresh gaskets on slip-fit joints to help stop leaks for good.

Frequently Asked Questions (FAQs)

Q: Can I reuse my old exhaust gasket, and how do I know if it's leaking?
A: Exhaust gaskets crush and conform to the flanges when they're tightened, so most aren't designed to be reused once the exhaust is removed. Signs of a leak include a ticking or puffing sound at startup, black soot around a joint, popping on deceleration, or a loss of power. Clean both sealing surfaces before installing a new gasket, and follow your Honda service manual for the correct installation steps and tightening procedure. Use the factory schematic to confirm the right gasket for each joint on your model.

Q: How do heat, mud, and water affect exhaust gaskets?
A: Repeated heat cycles and vibration slowly break down gaskets, especially on machines that work hard, tow, or crawl at low speed. Mud packed around a hot exhaust traps heat, and water crossings can shock-cool hot joints, which stresses the gasket and the hardware holding it. After wet or muddy rides, let the exhaust cool, rinse away caked mud, and check the joints for soot or loose hardware. Replace the gasket at the first sign of a leak to protect nearby parts from heat damage.

PRO TIP: Learn More about Honda OEM vs. Aftermarket Parts

PRO TIP: What is the difference between OEM Exhaust Gaskets vs Permatex Gasket Sealer?

PRO TIP: Learn More with The Ultimate Guide to Aftermarket UTV & ATV Exhaust Laws.

PRO TIP: Do I Need to Tune My UTV/ATV After an Exhaust Upgrade?

PRO TIP: How to Fix a Rattling UTV Exhaust Shield.

PRO TIP: What Do UTV & ATV Heat Barriers & Heat Shields Do?

Are You Looking to Find Great Places & Adventurous Trails to Ride Your UTV, Side by Side or ATV? Check out these highly recommended places:

• Glade Run
• Syracuse Sand Dunes
• Boggs & Boulders
• Muddy Bottoms
• Bundy Hill Off-Road Park