Billet Gas Cap, for Poly And Stainless Tanks

OVERVIEW

Upgrade your off-road machine with the ultimate finishing touch that combines rugged durability with high-end aesthetics. The EMPI Billet Gas Cap is engineered specifically for enthusiasts who refuse to settle for the standard, flimsy plastic caps found on most aftermarket fuel cells. Whether you are tearing up the dunes in a classic Manx-style buggy or navigating technical trails in a custom sand rail, this precision-machined component provides the "tricked out" custom look that sets your build apart from the crowd. Crafted from high-grade aluminum, this cap isn''t just about looks; it is built to withstand the harsh vibrations and environmental exposure inherent to the air-cooled VW lifestyle. When you are out in the elements, you need hardware that performs as well as it shines, and this billet piece delivers on both fronts.

Beyond its striking appearance, the EMPI Billet Gas Cap offers a superior tactile feel and a more secure seal compared to stock or economy alternatives. It is designed to interface perfectly with the threaded necks commonly found on polyethylene (poly) and stainless steel fuel tanks, ensuring that your fuel stays where it belongsinside the tank. The polished finish provides a mirror-like shine that resists corrosion and fuel staining, making it an ideal choice for show-quality builds and daily drivers alike. If you have invested in a high-quality stainless or poly tank for your Baja Bug or rail, don''t compromise the integrity of your fuel system with an inferior cap. This billet upgrade is the professional choice for owners who demand longevity, style, and a perfect fit for their specialized fuel storage solutions.

FITMENT

This billet gas cap is designed for aftermarket fuel tanks and is not a direct replacement for stock Volkswagen Beetle, Ghia, or Bus fuel tanks. It is specifically compatible with the following applications:

• Polyethylene (Poly) Tanks: Fits most standard 8-gallon and 10-gallon poly fuel tanks used in dune buggies and sand rails.
• Stainless Steel Tanks: Fits EMPI and similar brand "spun" stainless steel cylindrical tanks.
• Dune Buggies: Ideal for Meyers Manx, EMPI Imp, and other fiberglass body buggies using floor-mounted or cage-mounted aftermarket tanks.
• Sand Rails & Off-Road Frames: Fits most custom tube chassis rails utilizing a 2-inch threaded filler neck.
• Baja Bugs: Compatible with fuel cell conversions where a poly or stainless tank has been relocated to the rear or front trunk area.
• Custom Trikes: Frequently used on VW-powered trikes with external stainless steel fuel reservoirs.

SPECS

• Material: High-quality 6061-T6 Billet Aluminum for maximum strength and weight reduction.
• Finish: High-luster polished mirror finish for a premium custom appearance.
• Gasket Included: High-density fuel-resistant rubber O-ring/seal to prevent leaks and fumes.
• Thread Type: Precision machined internal threads designed for standard poly and stainless tank necks.
• Grip Style: Knurled or scalloped outer edge for easy removal even when wearing racing gloves.
• Venting: Designed to provide adequate atmospheric venting to prevent fuel pump cavitation and vacuum lock.
• Diameter: Standard sizing to match EMPI series 20-1220 fuel accessories.
• Weight: Approximately 0.55 lbs, providing a substantial, quality feel without adding unnecessary bulk.

PRO TIPS

Tip 1: Check Your Venting Requirements

While this billet cap is designed to allow the tank to breathe, always ensure your fuel system has a secondary vent line if you are running a high-volume electric fuel pump. Air-cooled VW engines rely on consistent fuel pressure, and a vacuum-locked tank can lead to mysterious stalling or lean-running conditions. If you notice a "hissing" sound when opening the cap after a long run, check that the cap''s internal breather passage is clear of debris or dust from the trail. Keeping the vent path open is critical for both gravity-fed and pump-fed systems to ensure your carburetor bowls stay full during high-RPM pulls.

Tip 2: Maintain the Seal and Threads

Because poly tanks and stainless tanks can have slightly different thread tolerances, never force the cap if you feel significant resistance. Before the first installation, apply a tiny amount of fuel-safe lubricant or a drop of light oil to the threads and the rubber O-ring. This prevents "galling" between the aluminum cap and the tank neck, and it ensures the rubber seal doesn''t bunch up or tear when you tighten it down. A well-lubricated seal provides a much better vapor barrier, which is essential for keeping those gasoline smells out of your garage or trailer during storage.

Tip 3: Protecting the Polished Finish

The polished aluminum finish looks incredible when new, but off-road environments can be brutal on bare metal. To keep your billet cap looking like jewelry, we recommend applying a high-quality metal sealant or a coat of carnauba wax before your first trip to the dunes. If the cap becomes dull due to salt air or mud exposure, a quick hit with a dedicated aluminum polish and a microfiber towel will bring back the original luster. Avoid using abrasive cleaners or steel wool, as these will scratch the precision-machined surface and make it harder to clean in the future.