Spark Arrestor, 18 Inch Stainless with 2 Inch Clamp On Inlet

OVERVIEW

When you''re tearing up the dunes or navigating technical forest trails in your air-cooled beast, safety and performance must go hand-in-hand. The EMPI 18-inch Stainless Steel Spark Arrestor is the gold standard for off-road enthusiasts who demand high-flow exhaust capabilities without the risk of starting a wildfire or failing a USFS inspection. Crafted from premium-grade stainless steel, this spark arrestor is designed to withstand the extreme heat and corrosive environments typical of high-performance VW engines. The 18-inch body provides an elongated chamber that effectively traps hot carbon particles while maintaining the backpressure necessary for optimal torque. Whether you are running a classic Manx-style buggy or a full-blown long-travel sand rail, this unit ensures you stay legal and protected on public lands.

What truly sets this EMPI unit apart is its legendary tunable disc system. This isn''t just a static muffler; it''s a precision tuning tool for your exhaust note and engine performance. By adding or removing the internal stainless steel discs, you can effectively increase or decrease the exhaust exit area. Adding more discs increases flow and volume for high-RPM power, while removing discs increases backpressure and significantly reduces decibel levels for a "stealthier" trail presence. The 2-inch clamp-on inlet makes installation a breeze on any standard 2-inch O.D. exhaust header or stinger. It''s the perfect marriage of form and function, providing a sleek, polished look that won''t rust or degrade like cheaper chrome-plated alternatives.

FITMENT

This spark arrestor is a universal-fit component designed for 2-inch Outside Diameter (O.D.) exhaust tubing. It is most commonly used on the following air-cooled Volkswagen applications:

• VW Dune Buggies: All years (Meyer''s Manx, Tow''d, etc.) with 2" stinger exhausts.
• Sand Rails & Off-Road Cars: Custom chassis applications using 2" header collectors.
• Baja Bugs: Ideal for high-clearance competition headers and custom turbo setups.
• VW Trikes: Custom 3-wheel applications requiring spark suppression and noise control.
• General Off-Road: Any vehicle utilizing a 2-inch O.D. exhaust exit pipe.

SPECS

• Overall Length: 18 Inches.
• Inlet Diameter: 2-Inch (Designed to clamp over 2" O.D. tubing).
• Material: High-Grade 304 Stainless Steel for maximum corrosion resistance.
• Finish: Polished Stainless.
• Design Type: Tunable Disc-Style Spark Arrestor.
• Mounting: Heavy-duty integrated clamp-on design.
• Weight: Approximately 5.39 lbs.
• Manufacturer: EMPI (Part Number AC251060).
• Maintenance: Fully rebuildable and cleanable internal disc stack.

PRO TIPS

Tuning for Performance and Sound

The beauty of the disc system is the ability to find the "sweet spot" for your specific engine displacement. As a general rule of thumb for air-cooled VWs, start with 6 to 8 discs for a standard 1600cc engine. If you are running a high-performance 2110cc or 2332cc stroker engine, you will likely need to add more discs (up to 12 or more) to prevent excessive backpressure that can cause your cylinder head temperatures to spike. Conversely, if you find the exhaust too loud for your local trails, removing two discs can significantly drop the decibel level without drastically hurting your low-end torque. Always re-check your spark plug color after making significant changes to the disc count, as it can slightly affect your air-fuel mixture.

Preventing Hardware Seizure

Because this spark arrestor is located at the hottest point of the exhaust system and is made of stainless steel, "galling" or seizing of the threads can occur over time. Before you assemble the disc stack or tighten the main clamp, Appletree recommends applying a high-temperature nickel-based anti-seize lubricant to all bolts and fasteners. This ensures that when you need to clean out carbon deposits or adjust the disc count a year from now, the bolts will back out smoothly rather than snapping off. This is especially critical if you frequently drive in damp environments or near the ocean where salt air can accelerate oxidation between different metal surfaces.

Routine Maintenance for Maximum Safety

A spark arrestor is only effective if it is clean. Over time, carbon "soot" and unburnt oil can build up between the discs, which can eventually clog the exhaust flow or, in extreme cases, create a fire hazard of its own. We recommend disassembled the disc stack every 50 hours of off-road use or at the end of every season. Use a stiff wire brush and a carbon-cutting solvent to clean the faces of the discs. Inspect the discs for any signs of warping or "burning through." Maintaining a clean disc stack ensures that your engine breathes freely and that the arrestor continues to meet USFS requirements for trapping hazardous sparks.