Spectra Premium Squarebody 1987 + Sending unit for LS and EFI

Name: Spectra Premium Squarebody 1987 + Sending unit for LS and EFI
Brand: SPECTRA
Price: 119.99 USD
Availability: OutOfStock
Rating: 4.5 (14 reviews)

1/6

Spectra Premium Squarebody 1987 + Sending unit for LS and EFI

$119.99 USD

Free Shipping $99+

Lifetime Warranty

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Spectra EFI Sending Units for Squarebody LS Swaps and EFI systems – FG05M & FG05N

Upgrade your Squarebody Chevy or GMC truck fuel system for EFI and LS power with the Spectra FG05M (Driver Side) and FG05N (Passenger Side) EFI sending units. These OE-style replacement units allow you to drop a high-pressure fuel pump directly into your factory-style tank – the cleanest way to fuel your LS swap or EFI conversion project.

We recommend pairing these sending units with a 1987+ fuel tank for best fit and compatibility with modern EFI systems.

Why Choose FG05M & FG05N for Your EFI Build?

✅ Direct-fit for Squarebody tanks – Designed to replace factory sending units
✅ EFI-ready design – Supports in-tank fuel pumps for clean and quiet operation
✅ Perfect for LS swaps – Get the pressure and volume your new engine needs
✅ Choose the correct side – FG05M = Driver side / FG05N = Passenger side
✅ Works with multiple pumps – See options below based on horsepower

Recommended In-Tank Fuel Pumps:

🔧 Spectra 190LPH Pump – For stock LS swaps up to 450HP – Click Here
🔧 Walbro 255LPH Pump – Supports builds up to 600HP – Click Here
🔧 Aeromotive 340LPH Pump – For high-performance setups up to 850HP – Click Here

Don’t Forget Your Adapter Fittings:

These sending units feature factory-style hard line outlets (3/8" & 5/16") and require adapter fittings to convert to AN-style fuel systems:

🧰 Hard Line to AN Adapter Fittings – Click Here

Fitment & Compatibility:

✔️ Designed for Squarebody Chevy/GMC pickups (1973–1987)
✔️ Compatible with EFI fuel pumps
✔️ Recommended upgrade to 1987+ fuel tank for best performance
✔️ Choose FG05M (driver side) or FG05N (passenger side) based on your tank configuration

Tech Tip:

Mounting an in-tank EFI pump helps eliminate external noise, prevents vapor lock, and makes your build look cleaner. Combine this with our AN PTFE hose kits or LS Swap kits for a complete EFI-ready fuel system.

🛒 Add FG05M (Driver Side) to Cart

🛒 Add FG05N (Passenger Side) to Cart

5 stars: 11 (79%)
4 stars: 1 (7%)
3 stars: 0 (0%)
2 stars: 2 (14%)
1 star: 0 (0%)

Second time buying from Hotrod fuel hose

I purchased a return style kit earlier this year for my 90s silverado i was putting an ls in. I was very pleased with the shipping and communication from the company before i even received my package. Shipping was fast and when i got my package i was pretty happy with the quality of fittings and fuel hose. I had a few questions and customer service replied within minutes of me sending the email. Great company and great products i recommend them to anybody looking for quality. This product is where its at.

Didn’t get to select L or R side when ordering.

Exact fit in tank

Good morning, thank you for your feedback. We appreciate the support!

Sending unit and fuel pump

Very good product, fit and worked great would definitely buy again!!!

Good morning, thank you for your support we greatly appreciate it.

Perfect fit

Kit had everything I needed for my 73 c20.

Hi, than you for your feedback and thank you for the support. We really appreciate it.

Spectra Premium Squarebody 1987 + Sending unit for LS and EFI

A quality piece on the spectrum

A quality piece on the spectrum.
It fit well with the 525 hellcat pump. And there – 8 an hard line fittings.

Good

Good deal

Total satisfied!

Smart knowledgable people, great service, fast delivery! A joy to do business with! Order… you will be totally satisfied!!

Exactly what I needed

Fast shipping and in stock

More then satisfied

Ordered the complete ls swap fuel kit for a k5 blazer and am satisfied with my order. Received good customer service and a follow up email.on my concerns with sending unit availability. I was assured they would have them in stack and would be able to fill.my order even tho the units were hard to find and not being sold by alot of other vendors. I would recommend this ls swap kit to anyone planning their build.

super slow shipping

part shows in stock, but after you place your order it gives you an update when you will receive it. I waited for my order for 4 weeks or more. my customer got tired of waiting and went elsewhere

Hi Jonny;

These senders were identified as being on back order on the product page highlighted in red. They are now fully stocked on our shelf and back orders have been filled so there is no longer any wait time on the senders to be delivered.

Sending unit

The sending unit did not function... I had to solder the manufacture connection ... poor quality..very disappointed

good quality product

fitment was good, needed for an ls swapped c10. designed for pass side tank but woks perfectly in driver side tank with fittings facing opposite direction for easier access.

I'm going to be using an aftermarket fuel gauge with this sender what's the ohm reading at empty and full so I know which gauge to use for an accurate reading thanks

Will this sending unit work in the K5 blazer tank?

Does this sending unit accept factory truck ls truck fuel lines? What fittings are on the sending unit?

Will this fit a 1991 s10 fuel tank

I'm going to be using an aftermarket fuel gauge with this sender what's the ohm reading at empty and full so I know which gauge to use for an accurate reading thanks

Justin Gorzitza

This is a 0-90 ohm fuel level sender.