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Chassis Engineering 4381 1-3/4" Aluminum Filler Cap with Steel Bung

Manufacturer

Picture for manufacturer Chassis Engineering

Part Number

4381
7 reviews
Sale Price

$33.92

1 left at this price

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Usually delivered within 2 days

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The Chassis Engineering 4381 is a precision-machined aluminum filler cap assembly with steel weld-in bung designed for custom fuel tanks, oil reservoirs, water tanks, and rear differentials. This compact 1-3/4" cap provides a professional, leak-free solution for fluid filling applications in race cars, hot rods, and custom automotive builds.

Key Features:

  • Precision-machined aircraft-grade aluminum cap construction
  • Steel weld-in bung with 1-5/8" major outside diameter
  • Complete assembly includes rubber o-ring seal for positive sealing
  • Knurled edge design provides easy grip for removal and installation
  • Non-vented cap suitable for multiple fluid applications
  • Compact 1-3/4" cap diameter fits tight installations

The billet-style cap features a threaded design that creates a secure seal through radial compression of the included o-ring. The steel bung is designed for permanent welding into tanks or filler neck assemblies, providing a durable mounting solution. Ideal for custom fabrication projects where a clean, professional appearance and reliable sealing are essential.

Easy to find part and place order through Amazon

Ordered a sling to store my roof rack. There was an issue with the supplier which was quickly resolved by the Autoplicity staff. Great customer service -- most responsive I've ever seen.<br><br>Best prices around.

Super easy to browse web site and find the product I wanted.<br>The price was unmatched.<br>Shipping was fast and cheap.<br>Super shopping experience.

Good prices!!! Had problems with shipping order but was made very good on issue!! Now placing another order. Thanks guys

Great prices, helpful customer service. Ordered 2 by mistake. And they got it cleared up real fast. Saved over $80 off retail. Will be ordering from the, again!!!!! <br>

Rather amazing and uneventful service in this day and age. Ordered a Thule bike rack for my Nissan Murano. It was in stock (unusual for high-end specialty products), shipped the next day, and was on my doorstep in a few days (excellent for a 60 lb. large box). I'd buy anything from these people without any reservation. AND, your order is insured - completely superfluous. Oh, and did I mention, the lowest price I could find ANYWHERE, and not by a few dollars - a lot.

Excellent service with the actual stock on hand, shipment was made the next day and a tracking number was provided. I have tried 2 other online supply stores which don't know what they have in stock.

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