---
product_id: 20958740
title: "777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler"
brand: "hayden automotive"
price: "¥76531"
currency: JPY
in_stock: true
category: "Hayden Automotive"
url: https://www.desertcart.jp/products/20958740-777-rapid-cool-37mm-heavy-duty-engine-transmission-cooler
store_origin: JP
region: Japan
---

# Heavy-duty plate & fin design 37mm compact size Supports GVWR up to 24,000 lbs 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler

**Brand:** hayden automotive
**Price:** ¥76531
**Availability:** ✅ In Stock

## Summary

> ❄️ Cool smarter, drive stronger — don’t let heat slow your hustle!

## Quick Answers

- **What is this?** 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler by hayden automotive
- **How much does it cost?** ¥76531 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/20958740-777-rapid-cool-37mm-heavy-duty-engine-transmission-cooler)

## Best For

- hayden automotive enthusiasts

## Why This Product

- Trusted hayden automotive brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Compact Powerhouse:** Sleek 37mm plate and fin cooler fits tight spaces without sacrificing performance.
- • **Max Flow Efficiency:** 12 fittings engineered for superior oil flow, keeping your engine and transmission chill under pressure.
- • **Trusted Performance:** Join thousands of pros who rely on Hayden’s proven design to prevent transmission failures.
- • **Extend Equipment Life:** Every 20° drop in operating temperature doubles oil and component lifespan—beat overheating before it starts.
- • **Heavy-Duty Reliability:** Built to handle trucks, vans, and motorhomes towing up to 5,000 lbs with ease.

## Overview

The Hayden Automotive 777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler is a compact yet powerful plate and fin cooler designed for high flow and maximum heat transfer. Ideal for heavy-duty vehicles like pick-up trucks, vans, and motorhomes with GVWR up to 24,000 lbs and towing capacity up to 5,000 lbs, it helps prevent transmission failures caused by overheating by significantly lowering operating temperatures and extending oil and equipment life.

## Description

Hayden's 37 millimeter heavy duty plate and fin coolers are ideal for transmission and engine oil cooling applications requiring higher flow range and increased heat transfer in a compact space. Over 14 million transmissions fail every year, 9 out of 10 from overheating. Every 20 degree drop in operating temperature can double oil and equipment life.

## Features

- Size is 1-3/4 inch X 6-5/8 inch X 12-15/16 inch
- Pick-up trucks and vans, class "C" motor homes , travel trailers to 24 feet
- GVWR up to 24,000 pounds, towing up to 5,000 pounds
- Plate and fin, heavy duty, high capacity design
- 12 fittings for maximum flow capacity

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0049ESKSM |
| Best Sellers Rank | #861,548 in Automotive ( See Top 100 in Automotive ) #251 in Automotive Replacement Engine Coolers |
| Brand | Hayden Automotive |
| Customer Reviews | 4.8 4.8 out of 5 stars (5) |
| Date First Available | October 27, 2010 |
| Exterior | Machined |
| Item Weight | 2.9 Pounds |
| Item model number | 777 |
| Manufacturer | Hayden Automotive |
| Manufacturer Part Number | 777 |
| Model | Transmission Cooler |
| Product Dimensions | 13 x 14 x 12.6 inches |
| Special Features | Compact |

## Product Details

- **Adjustable Temperature Control:** No
- **Brand:** Hayden Automotive
- **Cooling Method:** Passive
- **Defrost System:** Automatic
- **Form Factor:** Compact
- **Installation Type:** Countertop
- **Is Electric:** No
- **Item Weight:** 2.9 Pounds
- **Model Name:** Transmission Cooler
- **Special Feature:** Compact

## Images

![777 Rapid-Cool 37mm Heavy Duty Engine/Transmission Cooler - Image 1](https://m.media-amazon.com/images/I/71D0tbxtIrL.jpg)

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**Shop now:** [https://www.desertcart.jp/products/20958740-777-rapid-cool-37mm-heavy-duty-engine-transmission-cooler](https://www.desertcart.jp/products/20958740-777-rapid-cool-37mm-heavy-duty-engine-transmission-cooler)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-03-19*