# aFe MACH Force-Xp 3in 409 Stainless Steel Down-Pipe 11-15 GM Diesel Trucks LML V8 6.6L (td)

This aFe POWER turbo downpipe is engineered to outflow and outperform the restrictive, factory downpipe on the 2011 - 2015 GM Truck with V8-6.6L (td) engine. The mandrel bent, stainless steel tubing offers smoother transition bends for increased airflow, delivering quicker turbo spool times. CNC machined V-band inlets and outlets ensure a factory style, 360-degree sealing surface. Both inside and outside surfaces of the downpipe are ceramic coated to reduce EGT's even in the most extreme environments.

-   3 IN Mandrel Bent Stainless Steel Tubing
-   CNC Machined Flanges
-   409 Stainless Steel
-   100% TIG-Welded

This Part Fits:

Year

Make

Model

Submodel

2015

Chevrolet

Silverado 2500 HD

High Country

2011-2015

Chevrolet

Silverado 2500 HD

LT

2011-2015

Chevrolet

Silverado 2500 HD

LTZ

2011-2015

Chevrolet

Silverado 2500 HD

WT

2015

Chevrolet

Silverado 3500 HD

High Country

2011-2015

Chevrolet

Silverado 3500 HD

LT

2011-2015

Chevrolet

Silverado 3500 HD

LTZ

2011-2015

Chevrolet

Silverado 3500 HD

WT

2015

GMC

Sierra 2500 HD

Base

2011-2015

GMC

Sierra 2500 HD

Denali

2011-2015

GMC

Sierra 2500 HD

SLE

2011-2015

GMC

Sierra 2500 HD

SLT

2011-2014

GMC

Sierra 2500 HD

WT

2015

GMC

Sierra 3500 HD

Base

2011-2015

GMC

Sierra 3500 HD

Denali

2011-2015

GMC

Sierra 3500 HD

SLE

2011-2015

GMC

Sierra 3500 HD

SLT

2011-2014

GMC

Sierra 3500 HD

WT

## Details

- **Price:** 667.17 CAD
- **Vendor:** aFe
- **Type:** Downpipes

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Default Title | 667.17 CAD | In stock |

## Images

- Photo - Primary
- Photo - Unmounted
- Photo - Unmounted
- User 4
- Photo - Unmounted
- Photo - Unmounted

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> Source: [Standard Auto Part](https://www.standardautopart.com/products/afe-mach-force-xp-3in-409-stainless-steel-down-pipe-11-15-gm-diesel-trucks-lml-v8-6-6l-td)
> Updated: 2026-07-15