We consider a 4 flat trailer extension to be a worthy investment in the long run. In the following post, we will help you to select the best 4 flat trailer extensions.

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Our Top Picks:

Best Overall: Buy: Curt 4 Flat Trailer Extension READ REVIEW

Best For Running Lights: Buy: Abn 4 Flat Trailer Extension READ REVIEW

Best With Perfect Length: Buy: Maxxhaul 4 Flat Trailer Extension READ REVIEW

Best For Screw Driver: Buy: Reese 4 Flat Trailer Extension READ REVIEW

Best For Side Marker: Buy: Woftd 4 Flat Trailer Extension READ REVIEW

Best For Good Size: Buy: Exerauo 4 Flat Trailer Extension READ REVIEW

Best For Good Material: Buy: Carrofix 4 Flat Trailer Extension READ REVIEW

Best For Plenty Of Wire: Buy: Limicar 4 Flat Trailer Extension READ REVIEW

Best For Worth The Money: Buy: Oyviny 4 Flat Trailer Extension READ REVIEW

Best For Brake Lights: Buy: Zimuqi 4 Flat Trailer Extension READ REVIEW

Best Overall: Curt 4 Flat Trailer Extension

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Curt 4 flat trailer extension is the epitome of what a great extension should be. The Curt 4 Flat Trailer Extension works fine, it has pretty stiff wires and has a play design. Manufacturer says: Virtually all of our custom vehicle-trailer wiring harnesses are installed using existing factory connectors on the vehicle for a plug-and-play connection. This versatile ball hitch comes in standard hitch receiver sizes and provides flexible vertical adjustment to ensure level towing, even with large, lifted trucks and suvs.

The extension can be bought for good value, It works well and has a perfect design. In addition, it is compatible with a wide variety of trailers. Most importantly, the curt 4 flat trailer extension worked fine, is perfect with plenty of wire and it installed in minutes.

Most buyers quickly discovered that the extension would fit a 4 pin trailer connection. Moreover, they also found that the extension works well on the 2013 e 350 wagon.

• This is made with more flexible insulation, though.
• This makes for solid construction and it worked perfectly.
• This is made from durable black molded rubber that will never rust or corrode.
• This is easy to install and it works as intended.

Best For Running Lights: Abn 4 Flat Trailer Extension

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Compared with other extensions in this category, the Abn 4 Flat Trailer Extension has a convenient design. The abn 4 flat trailer extension is built with good connectors and it has features for very good quality. Make sure this fits by entering your model number. Moreover, it is made with quality wires and it is designed to be top quality.

The extension works as expected, go ahead and it is white. Above all, the abn 4 flat trailer extension works perfectly, works well and it works perfectly.

Almost all buyers quickly discovered that the extension was a flat four pin connector. Further, they say that the extension is great for extending the trailer light connector from the truck. And, they strongly agree that this extension has no lip on either end, and so goes between them perfectly. To sum up, most customers found the extension suits best, and no one questions it.

• This is a family - owned company based out of South Dakota.
• This is needed for ram hitch cover.
• You can safely extend towing lights without consequently having a dimmer light.
• This is a much heavier cord than the one it replaced.

Best With Perfect Length: Maxxhaul 4 Flat Trailer Extension

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Maxxhaul offers a variety of extensions for personal choice and yet maintains quality in all the variants. The Maxxhaul 4 Flat Trailer Extension features a weatherproofed molded construction end plugs and comes with an 18" awg 300 volt flexible cord that extends from just 18 inches to 3 feet. With in-house design and quality assurance facilities overseas, you'll know your maxxhaul is here 'for the long haul. This 7 - way adapter measures at 3.75 " x 2.75 " x 1.75 " connected to the 4 - way adaptor measuring at 4 " x 1.25 " x 1.25.

The extension is really cheap, it is almost too beefy and has a perfect design. In addition, it fits snugly, is ready to use, it does the job and has a very nice design. Above all, the maxxhaul 4 flat trailer extension is great with perfect length and has a waterproof design.

Most customers agree that the extension will pull a trailer with electric brakes but that trailer has a 7 pin male connector. In addition, a few say that the extension works with a seven prong wiring system for towing. Also, a few also found that the round plug in provides a more secure connection which is less apt to pull or vibrate out while driving.

• Brass connectors enable solid electrical conductivity.
• Eliminates the need for multiple plugs and adapters to tow various vehicles.
• The Manufacturer says: with our superior connector design, it enables optimal solid electrical conductivity.
• Weather-sealed plugs would work in different climates to provide a solid connection.

Best For Screw Driver: Reese 4 Flat Trailer Extension

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The Reese 4 Flat Trailer Extension should be able to handle its purpose and duties with ease. The Reese 4 flat trailer extension works perfectly. It has stop lights and has a durable design. Reese towpower coiled 7-way blade to 4-flat adapter stretches with the movement of the vehicle. This heavy duty abrasion resistant coiled cable features a durable molded design and tin - plated terminals.

Above all, the Reese 4 flat trailer extension is highly recommend, is very good, it looks good and has a perfect design.

Most customers agree that the extension is perfect for flat towing hookup to motorhome to toad. In addition, they strongly agree that the extension is sweet a coil and is of great quality. Moreover, they strongly agree that the extension be used for 11 years and thousands of miles. Therefore, customers were eager to recommend it to friends and would-be buyers.

• This is used for brakes, lights and turn signals.
• This adapter works very well, and is also well made.
• This is perfect fit, easy to change and update old / worn to new.
• This reduces wire wear. In addition to that, it will last a long time.

Best For Side Marker: Woftd 4 Flat Trailer Extension

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The best part: the 4 flat trailer extension costs comparatively little and it is available to ship in 24 hours. The Woftd 4 Flat Trailer Extension is very sturdy and has a perfect design. It has a 4 way flattrailer wire harness connector socket for trailer truck hitch wiring. The weird 4 - way trailer wiring harness is made of pure copper, not easy to get hot, better electrical conductivity.

The extension works fine, is yellow, it worked perfectly and has a good design. Moreover, the extension is green and has a great design. Above all, the woftd 4flat trailerextension can be used on a wide variety of trailers.

Almost all buyers found that the extension is great for installing lights on a hitch carrier. Also, a few also found that the round cable is easier to secure to the frame using regular cable clamps and it coils neatly out of the way when not in use. Overall, buyers found this to be one of the best extensions for daily purposes.

• This provides plenty of extra length for a flexible installation.
• This is wrapped with insulating rubber that will never rust or corrode.
• This trailer connector makes a great replacement 4 - flat trailer wiring connector.
• This is highly waterproof, wear-resistant, flame retardant and cold - resistant and extremely durable.

Best For Good Size: Exerauo 4 Flat Trailer Extension

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The Exerauo 4 Flat Trailer Extension's material feels more premium than its price would suggest. The exerauo 4 flat trailer extension is designed with 18 awg color coded wires, for safe simply wiringsuitable for trailers under and over 80. Make sure this fits by entering your model number. The 4 - way standard flat light connector is ideal for all types of trailers, including marine boat trailer, horse trailer, motorcycle trailer, atv trailer, and also fits rv, caravans, food trucks, and other towed vehicles.

The extension works fine and it comes with a great kit. Above all, the exerauo 4 flat trailer extension is green, comes with good wire and it fits perfectly.

Almost all customers quickly discovered that the extension was perfect for lights on a trailer. Further, a few say that the extension is much heavier than wire with this really impressive price.

• This is suitable for most trailers under and over 80.
• Normal "cheep" 4 pin flat trailer wiring harness kit.
• This is designed to supply power for tail lights, turn and brake lights.
• This is great value in a heavy duty wiring harness.

Best For Good Material: Carrofix 4 Flat Trailer Extension

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The Carrofix line of extensions comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Carrofix 4 Flat Trailer Extension can change wire length, is good for good quality connectors and it can return for money - back guarantee. Make sure this fits by entering your model number. And, the extension can be used as a wire extension for an existing connector.

Most importantly, the carrofix 4 flattrailer extension is made from durable pvc jacketed cable wire, It's designed to supply power for tail lights, turn signals and brake lights and other signal lights as well as a ground connection.

Most buyers opine that the extension is the kind where all four wires are exposed and joined together to make a wide, flat wire. Also, a few say that the extension is perfect from truck to boat trailer. Moreover, they say that the extension is made from good materials etc. In conclusion, the tone of buyers is very positive and we believe that the extension suits the purpose.

• This is too short and it fits perfectly.
• This provides extra length for an easy installation.
• Molded 4 way trailer wiring connector, heavy duty 18 gauge jacketed cable wire, 32.

Best For Plenty Of Wire: Limicar 4 Flat Trailer Extension

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For a low asking price, Limicar 4 Flat Trailer Extension has managed to overwhelm their customers by packing as many features as they could. The limicar 4 flat trailer extension is the world’s leading online automotive parts. 18 awg color coded wire wishbone style harness. Further, the extension comes with brown wire and it is white.

Most importantly, the limicar 4flat trailerextension comes with great items and it is yellow.

Most customers found that the extension is perfect for rewiring a refurbished 16' trailer. In addition, a few say that the extension is not going to be long enough to reach the entire length.

• Manufacturer says: we offer a complete selection of led trailer light kit.
• This is constructed from the highest quality materials and superior quality is guaranteed.
• This fits trailers under & over 80" wide.
• This is not compatible with motorcycle trailer wiring.

Best For Worth The Money: Oyviny 4 Flat Trailer Extension

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Best part: Oyviny 4 Flat Trailer Extension costs comparatively little and it is available to ship in 24 hours. The oyviny 4 flat trailer extension allows for the extra length needed for tight turns with a trailer, stretchable coiled wire keeps memory and effectively weatherproof. A dust cover is included to protect the 4 way socket against moisture when not in use. The designed length of this coiled cable is 3ft(36 inches ), while the normal working length should be about 28 inches.

Lastly, the oyviny 4 flat trailer extension is worth the money and has a play design.

One customer says - "This 4 pin cable is very well made. ". Most customers opine that the extension includes a connector cover for the trailer side. Overall, for almost all buyers, Oyviny product was what they were looking for.

• This features tabs on the sides for a better grip when plugging and unplugging.
• It looks great, it performs well and has a durable design.
• Delivers what they promise.

Best For Brake Lights: Zimuqi 4 Flat Trailer Extension

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The Zimuqi 4 Flat Trailer Extension is satisfactory and appropriate and fits well with your daily use. The zimuqi 4 flat trailer extension is easy to use with coded 18 awg wires to clearly identify each wire's function, extended wiring system provides more flexibility. The Manufacturer says: Our factory has been in the production and research of solar components and auto parts industry products for more than 15 years, researched hundreds of products, contacted many customers who do export to the United States, and deeply understand that these products are in the residents. In addition, the extension is wrapped with insulating rubber that will never rust or corrode. Above all, the zimuqi 4 flat trailer extension is designed to supply power for tail lights, turn and brake lights, as well as a ground connection.

• The Manufacturer says: we cherish every customer and respect every customer's feelings.
• The manufacturer says: please trust our team and our products.
• New and hot releases.