# Wehrli 17-24 Chevrolet 6.6L L5P Duramax 2in Stainless Up Pipe Kit w/Gaskets

Replace the lightweight 16G, leak prone, 1 5/8" OEM up pipes on your 2017-2025 6.6L L5P Duramax equipped Chevrolet Silverado or GMC Sierra 2500 / 3500 HD truck with these heavy duty 11 gauge 2" Stainless up pipe kit. HD Stainless Bellows that will not crack and leak like OEM. Increase Turbo spool-up and decrease EGT's. This kit is for use with factory exhaust manifolds. - - Fully compatible with WCFab Billet Exhaust Manifolds (Part Number WCF100373). - - INCLUDES GASKETS! -NO Tuning required, bolt on! -Will fit on stock truck no other modifications or upgrades necessary! - - Replaces the following GM Part Numbers: 12688021, 12702943, 12681437, 12680270, 12681162, 12674813, 12681162, 12676611 - - Also fits 2019+ L5D Duramax (4500/5500/6500) Medium Duty Trucks.

-   Fully TIG Welded 11 GA Stainless Steel Construction
-   Heavy Duty 2" Passenger Side Up Pipe
-   Heavy Duty 2" Driver Side Up Pipe
-   Flows 26% Better than OEM
-   Up Pipe Gaskets (4)
-   NO TUNING REQUIRED
-   Made in USA

This Part Fits:

Year

Make

Model

Submodel

2021-2025

Chevrolet

Silverado 2500 HD

Custom

2017-2025

Chevrolet

Silverado 2500 HD

High Country

2017-2025

Chevrolet

Silverado 2500 HD

LT

2017-2025

Chevrolet

Silverado 2500 HD

LTZ

2017-2025

Chevrolet

Silverado 2500 HD

WT

2024-2025

Chevrolet

Silverado 2500 HD

ZR2

2017-2025

Chevrolet

Silverado 3500 HD

High Country

2017-2025

Chevrolet

Silverado 3500 HD

LT

2017-2025

Chevrolet

Silverado 3500 HD

LTZ

2017-2025

Chevrolet

Silverado 3500 HD

WT

2020-2025

GMC

Sierra 2500 HD

AT4

2024-2025

GMC

Sierra 2500 HD

AT4X

2017-2021

GMC

Sierra 2500 HD

Base

2017-2025

GMC

Sierra 2500 HD

Denali

2024-2025

GMC

Sierra 2500 HD

Denali Ultimate

2022-2025

GMC

Sierra 2500 HD

Pro

2017-2025

GMC

Sierra 2500 HD

SLE

2017-2025

GMC

Sierra 2500 HD

SLT

2020-2025

GMC

Sierra 3500 HD

AT4

2017-2021

GMC

Sierra 3500 HD

Base

2017-2025

GMC

Sierra 3500 HD

Denali

2024-2025

GMC

Sierra 3500 HD

Denali Ultimate

2022-2025

GMC

Sierra 3500 HD

Pro

2017-2025

GMC

Sierra 3500 HD

SLE

2017-2025

GMC

Sierra 3500 HD

SLT

## Details

- **Price:** 993.64 CAD
- **Vendor:** Wehrli
- **Type:** Connecting Pipes

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 993.64 CAD | In stock |

## Images

- Photo - Primary
- Photo - Primary
- User 1
- Logo Image

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/wehrli-17-24-chevrolet-6-6l-l5p-duramax-2in-stainless-up-pipe-kit-w-gaskets)
> Updated: 2026-07-03