---
product_id: 4615113
title: "Hayden Automotive 397 Transmission Line Fitting Kit"
brand: "hayden automotive"
price: "€ 18.75"
currency: EUR
in_stock: true
reviews_count: 8
category: "Hayden Automotive"
url: https://www.desertcart.ie/products/4615113-hayden-automotive-397-transmission-line-fitting-kit
store_origin: IE
region: Ireland
---

# 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:** € 18.75
**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?** € 18.75 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/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: Worked like a charm - Changed the fluid and filter in my Silverado. This fit right in the return opening at the radiator and let me use a nylon hose to route the fluid to a bucket. Made dropping the trans pan a lot less messy.

## 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 | #56,443 in Automotive ( See Top 100 in Automotive ) #12 in Automotive Replacement Transmission Cooling Lines |
| Brand | Hayden Automotive |
| Color | Multi |
| Customer Reviews | 4.7 4.7 out of 5 stars (520) |
| Date First Available | June 1, 2006 |
| Exterior | Machined |
| Global Trade Identification Number | 00036752003976 |
| Is Discontinued By Manufacturer | No |
| Item Length | 12.7 Centimeters |
| Item Weight | 0.48 ounces |
| Item model number | 397 |
| Manufacturer | Hayden Automotive |
| Manufacturer Part Number | 397 |
| Material | Metal |
| Model | FITTING |
| Outside Diameter | 8.89 Centimeters |
| Product Dimensions | 5"L x 3.5"W |
| UPC | 036752003976 |

## 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

### ⭐⭐⭐⭐⭐ Worked like a charm
*by M***. on November 8, 2023*

Changed the fluid and filter in my Silverado. This fit right in the return opening at the radiator and let me use a nylon hose to route the fluid to a bucket. Made dropping the trans pan a lot less messy.

### ⭐⭐⭐⭐⭐ Necessary to flush transmissions
*by J***J on September 1, 2025*

You need this for flushing transmission fluid. Worked on my Silverado and Wrangler. The wrangler transmission has arrows cast into it so you know which line to plug into at the transmission!! Just need clear tubing, a clear bucket and, lots if fluid. Sealed securely with no leaks. Make sure to weigh the hose thats in the bucket or else you’ll have transmission fluid everywhere!!!

## 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

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-02-25*