• aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD - Stateside Performance - DPF Back - aFe - aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD
  • aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD - Stateside Performance - DPF Back - aFe - aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD
  • aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD - Stateside Performance - DPF Back - aFe - aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD
  • aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD - Stateside Performance - DPF Back - aFe - aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD
  • aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD - Stateside Performance - DPF Back - aFe - aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD
  • aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD - Stateside Performance - DPF Back - aFe - aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD
  • aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD - Stateside Performance - DPF Back - aFe - aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD
  • aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD - Stateside Performance - DPF Back - aFe - aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD
1 8

AFE49-44126-B

aFe

aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD

aFe Large Bore-HD DPF-Back Exhaust System - 4 in 409SS w/ Black Tip | 2020-2026 Chevy Silverado 3500HD

$808.00 USD
$808.00 USD
Sale Sold out
Shipping calculated at checkout.

The aFe Large Bore-HD DPF-Back Exhaust fits the 2020-2026 Chevy Silverado 3500HD 6.6L L5P Duramax and delivers a 4in mandrel-bent 409 stainless flow path for stronger throttle response and increased exhaust velocity.

Install Difficulty: DIY Possible
Bolts to factory-style hangers and mounting locations with hand tools; typically installs in 60-90 minutes with a vehicle lift, and some cutting may be required per the instruction sheet.

Product Overview

This DPF-back system replaces the factory exhaust from the DPF rearward with 4in mandrel-bent 409 stainless steel tubing. A mitered merge collector reduces turbulence to boost horsepower, torque, and throttle response on the L5P Duramax.

Dual 5in black 304 stainless intercooled clamp-on tips finish the system with an aFe POWER logo plate. Factory-style hangers bolt to OEM mounting locations for a direct fit.

Features & Specifications

  • Fits: 2020-2026 Chevy Silverado 3500HD 6.6L L5P Duramax
  • 4in mandrel-bent 409 stainless steel tubing
  • Dual 5in black 304 stainless clamp-on tips
  • Mitered merge collector for increased exhaust velocity
  • 100% MIG-welded construction
  • Bolts to factory-style hangers and mounting locations
  • Some cutting may be required per instruction sheet
  • All necessary hardware included

Fitment

This part fits the following vehicles:

Year Make Model Submodel
2020-2026 Chevrolet Silverado 3500 HD High Country
2020-2026 Chevrolet Silverado 3500 HD LT
2020-2026 Chevrolet Silverado 3500 HD LTZ
2020-2026 Chevrolet Silverado 3500 HD WT
⚠ Submodel Fitment: If your submodel is not listed in the fitment table above, we cannot confirm fitment. Please contact us before purchasing to verify.

Shipping & Returns

Tracking is typically provided within 3–5 business days; items shipping direct from the manufacturer may take 5–7. Some items are made to order or may be backordered. Questions about stock? Reach us through live chat or email.

Warranty

All warranties are through the manufacturer and are facilitated by Stateside Performance. Some manufacturers require the end user to contact them directly; in that case we will point you to the right contact. Email us with any warranty questions.

View full details

  • Free shipping over $250

    Free shipping applies to items that are shipped via ground through UPS or FedEx and are over $250 going to the continental 48 states. This does not apply to Alaska or Hawaii, and does not apply to any item(s) that are shipped via freight or with any other option other than ground shipping.

    Shipping policy 

  • 30-day returns

    Returns must be requested within 30 days of delivery. Parts must be new, unused, uninstalled, and in original packaging, with an RMA. Some items are final sale.

    Return policy