2-PIECE FUEL NECK

ADAPTER

The Leak Defender® is a 2-piece fuel neck replacement system consisting of a collar and cap. It stops leaking fuel cap issues on Kenworth, Peterbilt and Freightliner trucks…100% money back guaranteed!

REPLACES YOUR OLD, WORN

FUEL NECK

The collar creates a completely NEW sealing surface and replaces your old, worn fuel neck. The collar has an o-ring underneath which seals to your existing fuel neck when tightened with a strap wrench and is securely fastened with set screws. It is sealed along the outer perimeter, away from the inner perimeter which is prone to wear and tear from everyday fueling.

NEW & IMPROVED FUEL CAP

INCLUDED

Also included is a new and improved fuel cap. It’s machined from billet aluminum allowing it to be made with a high degree of precision & with the strength to withstand everyday wear & tear.

BENEFITS

Stop Fuel Cap Leaks on Kenworth, Peterbilt & Freightliner Trucks

STOP FUEL CAP LEAKS

The Leak Defender® is the only product out there that stops fuel cap leaks for good...Guaranteed!

Keep Your Fuel Tank Clean

KEEP YOUR TANK CLEAN

When you have pride in your ride, you want to keep it clean. No more fuel leaks, means it's much easier to keep it that way!

Save on Fleet Repair Costs

SAVE ON REPAIR COSTS

Constantly replacing your fuel cap is not only ineffective, but a small cost that can add up to a big cost over time. And replacing your fuel tank not only cost a lot, but costs in downtime too!

Fast & Easy Install

FAST & EASY INSTALL

Installs in just minutes...Minimizing downtime! Just twist, tighten with a strap wrench & install set screws.

Stay DOT Compliant

STAY DOT COMPLIANT

The Department of Transportation (DOT) has mandated that the fuel systems on heavy trucks are properly sealed and free from leaks.

MINIMIZE DOWNTIME

Installation requires no downtime...It installs in just minutes. When your trucks are in the repair shop, you're missing the income from being on the job. It's estimated that downtime can can cost as high as $700 a day!

FEATURES

Made in the USA

MADE IN THE USA

We are an American company, proudly offering premium quality products that are manufactured and assembled right here in the USA. 

FITS NEARLY ALL MODELS

The Leak Defender® fits all Kenworth and Peterbilt models over the OEM factory fuel neck. And it fits all Freightliner models with push-n-twist style fuel caps.

MADE OF BILLET ALUMINUM

It’s machined from billet aluminum allowing it to be made with a high degree of precision & with the strength to withstand everyday wear & tear.

Fuel Cap Specifications

SPECIFICATIONS

Cap Diameter:

4.25" Dameter On All Models

Total Height w/ Cap:

KW = 2" PB = 1.75" FL= 2.5"