Customer Appreciation Week 2026

1973-87 Chevy Pickup and Blazer 4 Row Radiator, OEM Replacement

Customer Appreciation Week 2026

1973-87 Chevy Pickup and Blazer 4 Row Radiator, OEM Replacement
Speedway Motors

|

#9103730

1973-87 Chevy Pickup and Blazer 4 Row Radiator, OEM Replacement

  • OEM replacement style copper/brass radiators designed for 1973-87 GM pickups and blazers
  • Features 4 rows for efficient cooling performance
  • Includes a heater return line for improved functionality
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$624.99

/each

In Stock

$694.99

Save $70.00

Garage Sale alternatives: from $523.59


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Product Summary

Single Pass Radiator Style, Copper/Brass

  • OEM replacement style copper/brass radiators designed for 1973-87 GM pickups and blazers
  • Features 4 rows for efficient cooling performance
  • Includes a heater return line for improved functionality
  • Core height measures 28 1/4" and core width measures 19"
  • Inlet size is 1-3/8" and outlet size is 1-9/16"
See more details

Key Specs

Radiator StyleSingle Pass
Radiator Flow DirectionCrossflow
Material TypeCopper/Brass
Inlet LocationUpper driver side
Outlet LocationLower passenger side
See more specs

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Speedway Motors 9103730 Details

These OEM replacement style copper/brass radiators are designed to fit 1973-87 GM pickups and blazers.  They feature 4 rows for efficient cooling performance and include a heater return line.

  • OEM style copper/brass radiator
  • 4 row
  • Has heater return line
  • Core Height: 19"
  • Core Width: 28 1/4"
  • Inlet: 1-3/8"
  • Outlet: 1-9/16"

Learn more about how radiators work and selecting the proper radiator for your vehicle by reading our tech article. Radiator Cooling Performance. 

Speedway Motors 9103730 Specifications

KEY SPECS
MFG. Part #9103730
BrandSpeedway Motors
Radiator StyleSingle Pass
Radiator Flow DirectionCrossflow
Material TypeCopper/Brass
Inlet LocationUpper driver side
Outlet LocationLower passenger side
Row Quantity4
Overall Width Range34.00" to 34.99"
Overall Width34.75"
Overall Height Range21.00" to 21.99"
Overall Height21.5"
Overall Thickness5.5"
Core Width Range28.00" to 28.99"
Core Width28.25"
Core Height Range19.00" to 19.99"
Core Height19"
Core Thickness2.5"
Cooling FanNot Included
Transmission CoolerYes
Shroud IncludedNo
Inlet Size1.375"
Outlet Size1.5625"
GENERAL
Fan IncludedNo
NotesLOWER DRIVER SIDE DRAIN PORT. PASSENGER SIDE OIL COOLING PORTS INCLUDES OVERFLOW HOSE 3/8" ID X 24 INCH
Sold in QuantityEach

Ratings & Reviews

5

8 Reviews

Overall Assessment

Customers highly praise this radiator's exceptional quality and practicality. The product is made with copper and brass, which ensures consistent cooling in any element, and has an adaptable design, allowing it to fit different hose sizes. Many reviewers regard it as a perfect and affordable replacement, even commenting it's the best radiator they've come across. The bonus feature of an optional brass petcock enhances its usability and quality. Ultimately, they recommended it over other options and believe it holds true to its 1970's-style durability and efficiency.

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5

8 reviews

5

8

4

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California overheating solved!!

5.0

10 months ago

Cowabunga

Calaveras Clunty

Verified

We bought this radiator for a 1974 Chevy p20 shorty ice cream truck. It was overheating so bad in the California sun! This has totally cooled it down!

Would Recommend

As expected!

5.0

a year ago

JhnD

Iowa

Verified

Copper, The good stuff!

Would Recommend

Should be the only one I ever need.

5.0

a year ago

Al

Lincoln Nebraska

Verified

It's a heavy duty radiator that fits in the factory position.

Would Recommend

Great product

5.0

3 years ago

..

Memphis TN

Verified

Great product

Still built like the radiators in the 1970's

5.0

3 years ago

Rudy

Meridian, Idaho

Exact fit four row. I discarded the supplied plastic pet c**k and transferred the brass one from the old radiator. The upper radiator inlet is stepped into two sizes. I had to use a hose adapter on my old radiator. This radiator will accommodate both hose sizes depending on year of vehicle.

Would Recommend

I would order from your company again.

5.0

3 years ago

None

Carlsbad New Mexico

Verified

Use in our 83 chevy c30, priced just right.

Would buy again

5.0

7 years ago

Drrocko

Missoula, MT

Verified

perfect replacement for the leaking factory one I had. Fit was excellent

Would Recommend

Outstanding Radiator

5.0

11 years ago

Maceone

New York, NY, USA

Verified

This Radiator is unbelievable. 4 Rows and made from Copper and Brass for ultimate and consistent cooling no matter what type of element your in. The best Radiator I've ever seen

Would Recommend

Showing 8 of 8 reviews

Questions & Answers

2 Questions • 2 Answers

What is the overall width and height?

by Dan

• 3 years ago

1 answer

View Answer

I was wondering if the transmission cooling lines were on the driver side. My 82 gmc had the diesel in it and the tranny lines are opposite the gas models. Thank you!

by Doulton

• 7 years ago

1 answer

View Answer

2 of 2 questions shown

Fitment

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