# Stainless Works 2020-21 Silverado HD 6.6L 1-7/8in Long Tube Header Kit Factory Connect

Upgrade to Long Tube headers on your 2020-21 Chevy Silverado or GMC Sierra HD with this system from Stainless Works. Unleash that 6.6L motor with 1-7/8" primaries that flow into a 3" collector with an integrated merge spike. This system comes with high flow cats and a Y-pipe for a simple bolt-on install.

This Part Fits:

Year

Make

Model

Submodel

2020-2022

Chevrolet

Silverado 2500 HD

Custom

2020-2022

Chevrolet

Silverado 2500 HD

High Country

2020-2022

Chevrolet

Silverado 2500 HD

LT

2020-2022

Chevrolet

Silverado 2500 HD

LTZ

2020-2022

Chevrolet

Silverado 2500 HD

WT

2020-2022

Chevrolet

Silverado 3500 HD

High Country

2020-2022

Chevrolet

Silverado 3500 HD

LT

2020-2022

Chevrolet

Silverado 3500 HD

LTZ

2020-2022

Chevrolet

Silverado 3500 HD

WT

2020-2022

GMC

Sierra 2500 HD

AT4

2020-2021

GMC

Sierra 2500 HD

Base

2020-2022

GMC

Sierra 2500 HD

Denali

2022

GMC

Sierra 2500 HD

Pro

2020-2022

GMC

Sierra 2500 HD

SLE

2020-2022

GMC

Sierra 2500 HD

SLT

2020-2022

GMC

Sierra 3500 HD

AT4

2020-2021

GMC

Sierra 3500 HD

Base

2020-2022

GMC

Sierra 3500 HD

Denali

2022

GMC

Sierra 3500 HD

Pro

2020-2022

GMC

Sierra 3500 HD

SLE

2020-2022

GMC

Sierra 3500 HD

SLT

## Details

- **Price:** 3546.39 CAD
- **Vendor:** Stainless Works
- **Type:** Headers & Manifolds

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 3546.39 CAD | In stock |

## Images

- Photo - Primary
- Photo - Mounted
- Photo - Close Up
- Photo - Close Up
- Photo - Unmounted
- Photo - Unmounted
- Photo - Unmounted
- User 1

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/stainless-works-2020-21-silverado-hd-6-6l-1-7-8in-long-tube-header-kit-factory-connect)
> Updated: 2026-07-13