Fast Monty's Garage - The Shop
1966 and 1967 Pontiac ABody - Dual 14 inch Fan Shroud for Cold Case GPG38AS Wide Tube Radiators
1966 and 1967 Pontiac ABody - Dual 14 inch Fan Shroud for Cold Case GPG38AS Wide Tube Radiators
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Keep your Pontiac running cool with this precision-engineered fan shroud for the Cold Case GPG38AS "Wide Tube" Radiator.
Note, this does NOT fit the standard GPG38, or GPG38A, the "S" designates 1.25" wide tubes. If you're unsure, please see included diagram of the correct radiator dimensions. See here for the standard listing: GPG38 Standard Listing
Upgrade your cooling system with our custom-designed shroud for the Cold Case GPG38AS radiator that delivers measurably better cooling efficiency than the standard Cold Case shroud design. Through optimized fan sizing and precision-engineered airflow channels, this shroud maximizes the contact between your fan and radiator surface—ensuring every CFM of airflow does its job.
While the standard Cold Case shroud is a solid choice, our design takes cooling performance to the next level—ideal for high-performance builds, hot climates, or anyone who demands the absolute best from their cooling system.
Key Performance Advantages:
- Enhanced Shroud performance: Flap doors allow "pass through" of high velocity air while at speed, dramatically cutting down the need for fan usage.
- Optimized Fan Size: Direct fit 14" fans were selected by Monty
- Not sure which fans to use? Check out Monty's independent fan CFM test results to see real-world performance data and compare different fan options.
- Better Fitment: Custom-contoured to the Cold Case Radiator for a truly integrated three piece cooling solution, overlapping the side brackets, accommodating larger fans.
Compatible Fan Part Numbers (14" Fans):
- Spal 30102042 (14" Brushed High Performance Puller)
- Maradyne M142K (14" Brushed High Performance Puller)
- Proform 67035 (14" Low Profile BRUSHLESS)
Necessary Accessories for Installation (Not Included):
- Fan mounting hardware M6x1 - 16mm long (12 Included with Powder Coated Shrouds)
- Two Rubber Flap Doors, Spal part #30130012 (Included with Powder Coated Shrouds)
- Fan relay and wiring harness (if not already installed)
- Make sure each relay is rated for 30 to 40 amps. Manufacturers include Spal, Painless Performance, Derale, Ron Davis, and American Autowire. (I personally have the Painless Performance kit, with 195 on, 185 off)
- Adjustable thermostat switch (recommended for automatic operation) typically included with most Fan Relay harnesses.
- See the "Down Flow Shrouds" video for installation tips.
Specifications:
- Fits 1966 to 1967 Pontiac Tempest, Lemans, and GTO, WITH A/C
- Designed specifically for Cold Case radiator model GPG38AS Air Conditioned cars.
- Accommodates 14" fans, inquire for different fans not listed
- Available in powder coated black or raw aluminum finish
- Raw Aluminum does have witness marks that can be cleaned with Scotch Brite, or a Magic Eraser
- Precision CNC-cut from aircraft-grade aluminum
- Made in the USA
Note: This is an aftermarket shroud designed to work with the Cold Case GPG38AS radiator. It is not manufactured by Cold Case Radiators. Fans and installation accessories sold separately. Lead time for Raw Aluminum is around one week. If Powder Coated is out of stock, please order, as we do not replace stock without an existing order, lead time is two weeks.
Don't forget to check out Monty's Discounted Parts and Blems, which may have working shrouds with minor Blemishes.
See our Radiator Fan Shroud Installation Guide for step-by-step instructions.
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Good afternoon, all
As a huge car enthusiast, we all search for that one automotive sight or part that can help our builds. Well FastMonteyGarage is the sight that every Hot Rod and Muscle car enthusiast should visit. I have been the proud owner of my 1966 Pontiac Lemans since 1988. After many changes to the car and several different engine combinations the nightmare of keeping the power plant cool is always a challenge. As many of us are chasing the old school high horsepower streetcar dream the problem begins. A year ago, the engine came out of the Dyno room with just over 850hp on 91octane. After upgrading radiator / fan shroud and fans and multiple thermostats. I could not seem to drive the car at temperatures above 75 degrees. After going down many different avenues, I finally stumble across FastMonteyGarage bench testing cooling fans. It was a 25min video that explained a lot of information that I guess I just overlooked. Then after visiting his web site. I figured I would reach out and asked a few questions. It was a Sunday evening and not expecting a response until the following week I sent the email. The response was immediately the answer was answered and the radiator shroud was ordered with the recommended 14’’ cooling fans. The following morning, I received an email from the shop saying I ordered the wrong part and to please verify part number of my radiator, part number was verified and order was placed. The customer service is above and beyond. I received the parts and installation began. The quality of the product is unbelievable Every hole lined up perfectly and the fitment was precise. After everything was installed, it was the first test drive. Temperature outside was 100degrees in Idaho. Car ran perfectly Driver side and Passenger cylinder head temperature ran at 200degrees. (Engine has cast iron heads). Since radiator shroud was installed with new 14’’ cooling fan I have put roughly 300miles on the car. Outside temperatures ranging from 85degrees to 100degrees. The coolant temp runs between 190 and 200degrees with these temperatures.
Thank you FastMonteysGarage for the great service and quality made in the USA parts.
