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Description

Want to keep your DPF but still get that deep, aggressive exhaust sound for your 2011-2016 6.7L Powerstroke? Upgrade to SPELAB's DPF-back pipe! This product is designed for users who want to keep their factory DPF and upgrade the exhaust piping behind it. You can choose between affordable 409 stainless steel (a direct OE replacement that solves rust and aging issues) or premium 304 stainless steel for better durability. Enjoy the black-coated exhaust tip for a sleek look and the expanded outlet diameter for improved sound and flow. Get the rumble you want—without deleting your DPF!

Parameter	T304	T409
Corrosion Resistance	18% Cr, 8% Ni(Better)	11% Cr, trace Ti(Good)
High Temp Resistance	≤870°C	≤800°C
Oxidation Resistance	Excellent	Good
Salt/Cl⁻ Resistance	Excellent	Good
Sulfide Resistance	Excellent	Good
Estimated Lifespan	10-15+ years	7-12 years

Specification

Filter Back Mateial	T409/T304 Stainless Steel
Exhaust tip Mateial	T201 Stainless Steel
Exhaust Diameter	4"
Installation	Bolt-on (no welding required)
Sound Level	Performance-enhanced tone (deeper but not overly loud)

Key Features

Performance Boost – Reduces exhaust restriction for better horsepower, torque, and fuel efficiency.
Durable Construction – T409 stainless steel resists corrosion and withstands daily use. Compared to T409, T304 contains higher nickel content (8-10%) for enhanced rust protection, especially in coastal or high-salt conditions.
Easy Bolt-On Installation – Uses factory-style hangers for a perfect fit (no welding needed).
Enhanced Exhaust Sound – Deeper, more aggressive tone without excessive drone.
OEM+ Fitment – Precision-engineered to match factory mounting points.
DPF-Compatible – Works with your stock diesel particulate filter (emissions compliant).
Stylish Black Exhaust Tip – Adds a rugged, custom appearance to your truck.

What's in the BOX?

4"Extension Pipe x 1

Over-Axle Pipe x 1

Tail Pipe x 1

Hanger x 1

Exhaust Tip x 1

4" Wide band clamps x 2

Gasket x 1

7/16" Hex bolts x 3

7/16" Hex nutsx 3

Installation

4'' DPF Back Instruction for 6.7L Powerstroke 2011-2016

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2011-2016 Ford F-250 / F-350 / F-450 Super Duty 6.7L Powerstroke
Does NOT fit Cab & Chassis configurations
Note: For maximum performance, pair with a DPF/CAT delete pipe (off-road use only).

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Q1: Does this DPF Back exhaust system keep the factory DPF (Diesel Particulate Filter)?
A1: Yes, this is a "DPF Back" system, meaning it only replaces the exhaust section after the DPF (including muffler/pipe). It does not delete the DPF, ensuring your truck remains emissions-compliant.

Q2: Will this exhaust improve performance or fuel economy?
A2: Since the DPF remains in place, gains are modest. However, the 4'' straight-through design reduces backpressure, which may slightly improve throttle response, torque, and exhaust flow efficiency.

Q3: Does installation require cutting the stock exhaust? Do I need professional help?A3: Most DPF Back kits are bolt-on but may require cutting the pipe after the DPF. DIY-friendly with basic tools (saw, wrenches), but professional installation ensures a perfect fit.

Q4: Will this make my truck louder? Will diesel "ticking" noise increase?
A4: Expect a deeper, more aggressive tone than stock, but the DPF and catalysts keep it from being excessively loud. The diesel "clatter" will still be present but may be slightly more noticeable.

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Fast Shipping Policy

Your order will be dispatched within 1-2 business days, and the package will arrive within your order's estimated date. Click for Shipping Policy

Easy Return Policy

Every order comes with a 14-day free return, which means you don't have to pay for a return slip. Click for Return Policy

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