---
product_id: 43656210
title: "ARP Header Bolt, 8 mm x 1.25 Thread, 1.181 in Long, Hex Head, Washers Included, Chromoly, Black Oxide, compatible with Mopar Gen III Hemi, Set of 16"
brand: "arp"
price: "AR$214029"
currency: ARS
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.ar/products/43656210-arp-header-bolt-8-mm-x-1-25-thread-1
store_origin: AR
region: Argentina
---

# Grade 8 Chromoly strength Precision 8mm x 1.25 metric thread Durable black oxide finish ARP Header Bolt, 8 mm x 1.25 Thread, 1.181 in Long, Hex Head, Washers Included, Chromoly, Black Oxide, compatible with Mopar Gen III Hemi, Set of 16

**Brand:** arp
**Price:** AR$214029
**Availability:** ✅ In Stock

## Summary

> 🔧 Bolt up your Hemi with power and precision!

## Quick Answers

- **What is this?** ARP Header Bolt, 8 mm x 1.25 Thread, 1.181 in Long, Hex Head, Washers Included, Chromoly, Black Oxide, compatible with Mopar Gen III Hemi, Set of 16 by arp
- **How much does it cost?** AR$214029 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.ar](https://www.desertcart.com.ar/products/43656210-arp-header-bolt-8-mm-x-1-25-thread-1)

## Best For

- arp enthusiasts

## Why This Product

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

## Key Features

- • **Unmatched Strength:** 8740 Chromoly steel engineered for extreme durability and performance
- • **Precision Threading:** Metric 8mm x 1.25 thread ensures secure, vibration-resistant fastening
- • **Proudly Made in the USA:** 100% in-house manufacturing guarantees premium quality and reliability
- • **Complete Kit with Washers:** Set of 16 bolts includes washers for hassle-free installation and optimal sealing
- • **Perfect Fit for Mopar Gen III Hemi:** Specifically designed to match your 5.7/6.1L Hemi header bolts for flawless compatibility

## Overview

This ARP Header Bolt set features 16 premium-grade 8740 chromoly hex bolts with a black oxide finish, designed specifically for Mopar Gen III Hemi 5.7/6.1L engines. With precision 8mm x 1.25 metric threading and washers included, these bolts deliver superior strength, corrosion resistance, and perfect fitment, all proudly manufactured in the USA.

## Description

Header Bolt, 8 mm x 1.25 Thread, 1.181 in Long, Hex Head, Washers Included, Chromoly, Black Oxide, compatible with Mopar Gen III Hemi, Set of 16

## Features

- Chrysler Hemi 5.7/6.1L hex header bolt kit
- Material type: 8740 chrome Moly
- Finish: Black oxide
- Made in the USA
- 100% of fastener manufacturing is in-house at ARP

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | 8740 chrome moly |
| Thread Size | 8 mm x 1.25 |
| Exterior Finish | Oxide |
| Manufacturer Grade | Premium |
| Head Style | Hex |
| Color | Black |
| Fastener Type | Hexagon Bolt |
| Brand | ARP |
| Thread Type | Metric |
| Item Diameter | 8 Millimeters |
| Thread Style | Right Hand |
| Item Hardness | Grade 8 |
| Size | M8x1.25 |
| Thread Class | 2A |
| Number of Pieces | 1 |
| UPC | 672036048327 |
| Global Trade Identification Number | 00672036048327 |
| Manufacturer | ARP |
| Model | Header Bolt |
| Item Weight | 13.4 ounces |
| Item model number | 140-1101 |
| Manufacturer Part Number | 140-1101 |
| OEM Part Number | 140-1101 |

## Product Details

- **Material:** 8740 chrome moly
- **Thread Size:** 8 mm x 1.25
- **Exterior Finish:** Oxide
- **Manufacturer Grade:** Premium
- **Head Style:** Hex

## Images

![ARP Header Bolt, 8 mm x 1.25 Thread, 1.181 in Long, Hex Head, Washers Included, Chromoly, Black Oxide, compatible with Mopar Gen III Hemi, Set of 16 - Image 1](https://m.media-amazon.com/images/I/710eoEAu+cL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Great for long tube headers 5.7
*by K***  on November 26, 2024*

Strong and perfect thread size

### ⭐⭐⭐⭐⭐ Because RACECAR
*by B***B on April 29, 2025*

It's an genuine ARP product, so not much else to say really.

### ⭐⭐⭐⭐⭐ The best of the best header bolts.
*by B***N on November 2, 2019*

I've researched and researched and found these hold up and live up to the ARP name.

## Frequently Bought Together

- ARP Header Bolt, 8 mm x 1.25 Thread, 1.181 in Long, Hex Head, Washers Included, Chromoly, Black Oxide, compatible with Mopar Gen III Hemi, Set of 16
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**Shop now:** [https://www.desertcart.com.ar/products/43656210-arp-header-bolt-8-mm-x-1-25-thread-1](https://www.desertcart.com.ar/products/43656210-arp-header-bolt-8-mm-x-1-25-thread-1)

---

*Product available on Desertcart Argentina*
*Store origin: AR*
*Last updated: 2026-03-19*