--- product_id: 53663035 title: "Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose" brand: "hayden automotive" price: "¥27495" currency: JPY in_stock: true category: "Hayden Automotive" url: https://www.desertcart.jp/products/53663035-hayden-automotive-678-rapid-cool-add-on-transmission-cooler-11 store_origin: JP region: Japan --- # Compact 11" x 9.5" x 0.75" design Patented internal turbulation for max heat transfer Supports GVWR up to 24,000 lbs & towing 5,000 lbs Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose **Brand:** hayden automotive **Price:** ¥27495 **Availability:** ✅ In Stock ## Summary > ❄️ Stay Cool, Tow Strong – The Ultimate Transmission Chill Factor ## Quick Answers - **What is this?** Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose by hayden automotive - **How much does it cost?** ¥27495 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/53663035-hayden-automotive-678-rapid-cool-add-on-transmission-cooler-11) ## 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 - • **Precision Compactness:** Sleek 11" x 9.5" x 0.75" profile fits effortlessly in tight engine bays. - • **Heavy-Duty Compatibility:** Engineered for pick-up trucks, vans, Class C motorhomes, and trailers up to 24 feet with GVWR up to 24,000 lbs. - • **Complete Installation Kit:** Includes cooler, 4’ hose, and mounting hardware for a hassle-free upgrade that keeps you road-ready. - • **Secure & Durable Connections:** 19mm thick brass hose barb fittings ensure leak-proof, long-lasting attachment under demanding conditions. - • **Turbocharged Cooling Efficiency:** Patented internal turbulation design maximizes heat dissipation while minimizing pressure drop for peak transmission performance. ## Overview The Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler is a compact, high-performance cooling solution designed for heavy-duty vehicles including pick-up trucks, vans, and Class C motorhomes. Featuring patented internal turbulation technology, it enhances heat transfer efficiency while maintaining minimal pressure drop. With robust brass hose barb fittings and a complete installation kit, it supports GVWR up to 24,000 lbs and towing capacities up to 5,000 lbs, ensuring reliable transmission protection on every journey. ## Description This Is A Premium Style Transmission Cooler Kit. Coolers Are A Compact Plate And Fin Design. 19 Millimeter Thick-Hose Barb Fittings Offer Secure Attachment. All Rapid Coolers Include The Patented "Flow Path Design" Which Increases Heat Transfer While Minimizing Pressure Drop. Kits Contain Cooler, Hose And Mounting Hardware. ## Features - Size Is 3/4 Inch X 11 Inch X 9-1/2 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 - Patented Internal Turbulation Increases Heat Transfer With Minimal Pressure Drop ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000C3DDKO | | Best Sellers Rank | 137,388 in Automotive ( See Top 100 in Automotive ) 729 in Car Drive & Transmission | | Brand | Hayden Automotive | | Connector Type | Hose Barb | | Connector type | Hose Barb | | Contact Material | Brass | | Contact Type | Normally Open | | Contact material | Brass | | Contact type | Normally Open | | Customer Reviews | 5.0 out of 5 stars 1 Review | | Global Trade Identification Number | 00036752006786 | | Item Weight | 485 g | | Manufacturer | Hayden Automotive | | Manufacturer Part Number | 678 | | Model Number | 678 | | Mounting Type | Surface Mount | | Mounting type | Surface Mount | | Number of Items | 1 | | Number of Packs | 1 | | Operation Mode | Automatic | | Operation mode | Automatic | | Specification Met | UL | | UPC | 036752006786 | | Unit Count | 1.0 count | ## Product Details - **Brand:** Hayden Automotive - **Connector type:** Hose Barb - **Contact material:** Brass - **Contact type:** Normally Open - **Mounting type:** Surface Mount ## Images ![Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose - Image 1](https://m.media-amazon.com/images/I/81h6hePwK3L.jpg) ![Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose - Image 2](https://m.media-amazon.com/images/I/41FNJu2a2AL.jpg) ![Hayden Automotive 678 Rapid-Cool Add-On Transmission Cooler 11.0” x 9.50” x 0.75” with 4’ Hose - Image 3](https://m.media-amazon.com/images/I/71fpAz2YFKL.jpg) ## Questions & Answers **Q: Anyone used this for a 3rd gen 4runner?** A: Yes, works great **Q: does it fit a 2009 toyota tacoma** A: Hello T. The 678 rapid-cool transmission cooler does not require any other fittings for it to be mounted for your application. So yes, it will work for your 2009 Toyota Tacoma. Bert CampRigid Hitch Amazon Sales **Q: how to install in 2007 nissan altima?** A: They have hardware to mount it directly to the back of your radiator. You attach it inline between the stock cooler and the transmission. **Q: Will this impact air condintioning performance?** A: It has not reduced the A/C cooling ( Miami, FL ) in my 2008 Equinox LTZ AWD 3.4L 6cyl , automatic Transmission Aisin Warner AF 33-5, except to lower the transmission coolant temperature by 20 degrees Fahrenheit while towing a Pop Up RV camper weighing a bout 2800 lbs. Good product. It will also increase the A/T fluid capacity by about 20 oz., obviously. ## Frequently Bought Together - Hayden Automotive 678 Universal Rapid-Cool 9.5” x 11” Add-On Transmission Cooler – Not for Direct Replacement of the OE Cooler - Hayden Automotive 253 Metal Mounting Bracket Kit - Magnefine 3/8" Magnetic Inline Transmission/Power Steering Filter --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.jp/products/53663035-hayden-automotive-678-rapid-cool-add-on-transmission-cooler-11](https://www.desertcart.jp/products/53663035-hayden-automotive-678-rapid-cool-add-on-transmission-cooler-11) --- *Product available on Desertcart Japan* *Store origin: JP* *Last updated: 2026-09-21*