Keep your Big Block Nova running cool with this precision-engineered fan shroud
Upgrade your cooling system with our custom-designed shroud for the Cold Case CHN548 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 12" fans were selected by Monty
Better Fitment: Custom-contoured to the Cold Case Radiator for a truly integrated cooling solution, overlapping the side tanks, accommodating larger fans.
Compatible Fan Part Numbers (12" Fans):
Spal 30102029 (12" Brushed High Performance Puller)
Proform 67034 and 67038 (12" Low Profile BRUSHLESS)
Necessary Accessories for Installation (Not Included):
Fan mounting hardware M6x1 - 16mm long (Included with Powder Coated Shrouds)
Six Rubber Flap Doors - Spal part number 30130012
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 "Gen 1 F-Body's" video for installation tips.
Specifications:
Fits 1968 to 1979 Big Block Nova's Cold Case CHN548 and CHN548A
Also fits Cold Case radiator model CHC11, and LS Conversion CHC547 variants (CHC11, CHC11A, and LS Swap models CHC547, CHC547A)
Accommodates 12" fans, inquire for different fan manufactures not listed
Available in powder coated black or raw aluminum finish
Raw Aluminum does have witness marks that can be cleaned with Scotchbrite, 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 CHN548 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.
