--- product_id: 4615113 title: "Hayden Automotive 397 Transmission Line Fitting Kit" brand: "hayden automotive" price: "110.39 DT" currency: TND in_stock: true reviews_count: 8 category: "Hayden Automotive" url: https://www.desertcart.tn/products/4615113-hayden-automotive-397-transmission-line-fitting-kit store_origin: TN region: Tunisia --- # Compact 12.7 cm length Snap-in style lines for GM 1996+ No cutting OE lines needed Hayden Automotive 397 Transmission Line Fitting Kit **Brand:** hayden automotive **Price:** 110.39 DT **Availability:** ✅ In Stock ## Summary > ⚡ Upgrade your ride’s cooling game—no hacks, just pro-grade precision! ## Quick Answers - **What is this?** Hayden Automotive 397 Transmission Line Fitting Kit by hayden automotive - **How much does it cost?** 110.39 DT with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.tn](https://www.desertcart.tn/products/4615113-hayden-automotive-397-transmission-line-fitting-kit) ## 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 - • **Trusted by Pros:** Rated 4.7 stars with 520+ reviews—join thousands upgrading their transmission cooling game. - • **Precision Engineered:** Machined metal fittings ensure durability and leak-free performance under pressure. - • **Compact & Space-Smart:** Slim 12.7 cm length fits neatly in tight engine bays for a clean, professional look. - • **Effortless Installation:** Snap-in design fits GM 1996+ models seamlessly, saving you time and hassle. - • **Zero Modifications Required:** Install an auxiliary transmission cooler without cutting or altering original equipment lines. ## Overview The Hayden Automotive 397 Transmission Line Fitting Kit is a precision-machined metal fitting designed for GM vehicles from 1996 onward. It enables quick, snap-in installation of auxiliary transmission coolers without cutting original equipment lines, simplifying maintenance and upgrades. Compact and durable, it’s highly rated by professionals and DIYers alike for reliable, mess-free transmission fluid management. ## Description The kit allows for auxiliary transmission cooler installation without cutting OE lines and also simplifies transmission cooler installation. Review: Good quality - Worked awesome for flushing my transmission Review: Fit perfect - Great piece. ## Features - GM 1996 and later snap-in style lines - Simplifies transmission cooler installation - For auxiliary transmission cooler installation without cutting OE lines - Package Dimensions: 12.7 L x 4.064 H x 8.89 W (centimeters) ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B000EPRCAC | | Best Sellers Rank | #91,701 in Automotive ( See Top 100 in Automotive ) #18 in Automotive Replacement Transmission Cooling Lines | | Brand | Hayden Automotive | | Brand Name | Hayden Automotive | | Color | Multi | | Customer Reviews | 4.8 out of 5 stars 521 Reviews | | Global Trade Identification Number | 00036752003976 | | Included Components | FITTING | | Item Dimensions L x W | 5"L x 3.5"W | | Item Length | 12.7 Centimeters | | Item Type Name | FITTING | | Item Weight | 13.61 g | | Manufacturer | Hayden Automotive | | Manufacturer Warranty Description | 1 year or 12K Miles | | Material | Metal | | Material Type | Metal | | Outside Diameter | 8.89 Centimeters | | Product Dimensions | 5"L x 3.5"W | | UPC | 036752003976 | | Unit Count | 1.0 Count | ## Product Details - **Brand:** Hayden Automotive - **Color:** Multi - **Global Trade Identification Number:** 00036752003976 - **Item Length:** 12.7 Centimeters - **Item Weight:** 13.61 g - **Manufacturer:** Hayden Automotive - **Material:** Metal - **Outside Diameter:** 8.89 Centimeters - **Product Dimensions:** 5"L x 3.5"W - **UPC:** 036752003976 ## Images ![Hayden Automotive 397 Transmission Line Fitting Kit - Image 1](https://m.media-amazon.com/images/I/51-A8Zl6X5L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Good quality *by M***T on November 16, 2025* Worked awesome for flushing my transmission ### ⭐⭐⭐⭐⭐ Fit perfect *by C***T on May 14, 2026* Great piece. ### ⭐⭐⭐⭐⭐ Works for Trans Flush on NNBS Chevy/GMC Trucks *by W***L on January 29, 2021* Replace cooler line on top left of radiator (left when facing the grill of the car). Use 3/8" ID clear tube. Start engine (in park) and let coolant flow out for up to 10 seconds or so. It's recommended you measure what comes out and put the same back in to avoid the problem I'm going to describe later. Turn the vehicle off. Fill the transmission back up. Repeat. You can also run the engine until you get bubbles in the line, shut the engine off, remove the pan and not have fluid poor all over your face (I could not remove my drain plug for the life of me). Now, don't do what so many people do after a fluid swap and assume that the dipstick is right the first time after all of this effort. It won't be because the fluid will be aerated and/or not fully filling the torque converter yet. So many people think their transmission slips after doing one of these fluid swaps but don't realize they haven't filled it back up all the way. You will be dumping a bunch of fluid - like 3 gallons. You need to get 4 gallons at least for the swap to replace all the fluid for real and be able to refill the transmission to full. In order to get the dipstick to read right, you need to fill it up, check, run the car through the gears, maybe even let it move a few yards back and forth, then check again. Do this a few times. Then when you get home or to your first destination, check again. If you experience slipping after doing this swap, it could very well be you haven't put enough fluid back in. The dipstick lies after an invasive swap like this, especially when you don't measure what you take out and replace with the same. How do I know this? Because I've helped a few DIY'ers who panicked thinking their transmission failed after the swap (because you hear this happens "all the time") and it turns out they just never checked the fluid after the first attempt. Luckily nobody destroyed anything because they didn't drive very far. Be smart. Measure what you take out. ## Frequently Bought Together - Hayden Automotive 397 Transmission Line Fitting Kit - Valterra W01-1400PB Clear Vinyl Tubing - 3/8" I.D. x 10' - ACDelco 24205103 GM Original Equipment Multi-Purpose Retainer --- ## 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.tn/products/4615113-hayden-automotive-397-transmission-line-fitting-kit](https://www.desertcart.tn/products/4615113-hayden-automotive-397-transmission-line-fitting-kit) --- *Product available on Desertcart Tunisia* *Store origin: TN* *Last updated: 2026-06-05*