John Barrett

EGR Performance Writer and 20-year veteran. I turn tired trucks into high-performance off-road beasts. By removing restrictions with EGR and DPF components, I maximize power to keep these legends running stronger than new.

John Barrett's Articles

EGR Delete vs DPF Delete: Which Is Better for Your Truck?

EGR Delete vs DPF Delete: Which Is Better for Your Truck?

2026-01-07
Cummins vs Duramax vs Powerstroke After Delete Compared

Cummins vs Duramax vs Powerstroke After Delete Compared

2026-01-06
What's the Best Diesel Tuner for 6.7 Cummins? Top Picks 2026

What's the Best Diesel Tuner for 6.7 Cummins? Top Picks 2026

2026-01-05
LML DPF Delete Install (Step-by-Step Guide) & Fix P20B9 Code

LML DPF Delete Install (Step-by-Step Guide) & Fix P20B9 Code

2025-12-30
P0401 EGR Insufficient Flow: What Causes It and How to Fix?

P0401 EGR Insufficient Flow: What Causes It and How to Fix?

2025-12-29
How to Disable AFM: 3 Proven Methods for GM V8 & V6

How to Disable AFM: 3 Proven Methods for GM V8 & V6

2025-12-26
Bad EGR Valve Symptoms & Fixes: Clean, Replace, or Delete It

Bad EGR Valve Symptoms & Fixes: Clean, Replace, or Delete It

2025-12-23
6.7 Powerstroke MPG After DPF Delete vs Stock

6.7 Powerstroke MPG After DPF Delete vs Stock

2025-12-22
6.7 Cummins MPG After EGR DPF Delete | Fuel Economy Results

6.7 Cummins MPG After EGR DPF Delete | Fuel Economy Results

2025-12-18
EGR & DPF Delete Horsepower Gains: What Really Happens

EGR & DPF Delete Horsepower Gains: What Really Happens

2025-12-17
How to Do a 6.0 Powerstroke EGR Delete Kit Installation

How to Do a 6.0 Powerstroke EGR Delete Kit Installation

2025-12-16
DPF Delete: Is It Legal in the US? What You Must Know

DPF Delete: Is It Legal in the US? What You Must Know

2025-12-15
Best 6.0 Powerstroke EGR Delete Kits for Performance Gains

Best 6.0 Powerstroke EGR Delete Kits for Performance Gains

2025-12-10
6.0 Powerstroke EGR Delete Kit: Benefits, Costs & Guide

6.0 Powerstroke EGR Delete Kit: Benefits, Costs & Guide

2025-12-08
How Much Horsepower a 7.3 Powerstroke Makes (Specs)

How Much Horsepower a 7.3 Powerstroke Makes (Specs)

2025-12-05
What Is an AFM Disabler? Benefits, Safety & How It Works

What Is an AFM Disabler? Benefits, Safety & How It Works

2025-12-04
Muffler Delete Cost (2026 Update): Labor, Parts, Hidden Fees

Muffler Delete Cost (2026 Update): Labor, Parts, Hidden Fees

2025-12-03
Is a Straight Pipe Legal in 2026? Full US Rules Explained

Is a Straight Pipe Legal in 2026? Full US Rules Explained

2025-12-02
What Is an EGR Delete? Simple Guide to Diesel EGR Removal

What Is an EGR Delete? Simple Guide to Diesel EGR Removal

2025-12-01
6.7 Cummins Delete Cost: 2026 Prices & What to Expect

6.7 Cummins Delete Cost: 2026 Prices & What to Expect

2025-11-28
Top 6.4 Powerstroke Issues: Full Troubleshooting Guide (2026)

Top 6.4 Powerstroke Issues: Full Troubleshooting Guide (2026)

2025-11-27
Is It a Good Idea to Block Off the EGR Valve in 2026?

Is It a Good Idea to Block Off the EGR Valve in 2026?

2025-11-26
Truck Deleting 2026：What Does Deleting a Truck Mean?

Truck Deleting 2026：What Does Deleting a Truck Mean?

2025-11-25
Duramax vs Powerstroke: Which Engine is Better in 2026?

Duramax vs Powerstroke: Which Engine is Better in 2026?

2025-11-18
6.0 Powerstroke EGR Delete: 2026 Pros, Cons & Full Guide

6.0 Powerstroke EGR Delete: 2026 Pros, Cons & Full Guide

2025-11-17
Best AFM Disabler for GM Truck: Expert Review & Buying Guide

Best AFM Disabler for GM Truck: Expert Review & Buying Guide

2025-11-16
L5P Duramax Ultimate Guide: Specs, Issues & Reliability

L5P Duramax Ultimate Guide: Specs, Issues & Reliability

2025-11-13
Deleted 6.7 Powerstroke Lifespan: Real Mileage Guide

Deleted 6.7 Powerstroke Lifespan: Real Mileage Guide

2025-11-12
How to Do a 6.7 Powerstroke CCV Filter Replacement

How to Do a 6.7 Powerstroke CCV Filter Replacement

2025-11-11
5.7L HEMI Engine Specs, Reliability & Upgrades (2026)

5.7L HEMI Engine Specs, Reliability & Upgrades (2026)

2025-11-10
6.7 Cummins Delete Pros and Cons: Should You Do It in 2026?

6.7 Cummins Delete Pros and Cons: Should You Do It in 2026?

2025-11-06
How Long Will a Deleted 6.7 Cummins Last? Longevity Factors

How Long Will a Deleted 6.7 Cummins Last? Longevity Factors

2025-11-05
Best Duramax Engine Years: Top Picks for Reliability & Power

Best Duramax Engine Years: Top Picks for Reliability & Power

2025-11-04
Do You Need a Tune After a DPF/EGR Delete? 2026 Guide

Do You Need a Tune After a DPF/EGR Delete? 2026 Guide

2025-10-31
6.7 Powerstroke Life Expectancy: How Long Will It Last?

6.7 Powerstroke Life Expectancy: How Long Will It Last?

2025-10-30
3rd Gen Cummins 5.9L & 6.7L Specs and Engine Details

3rd Gen Cummins 5.9L & 6.7L Specs and Engine Details

2025-10-28
6.7 Cummins Engine: Everything You Need to Know

6.7 Cummins Engine: Everything You Need to Know

2025-10-27
Comprehensive LLY Duramax Maintenance Schedule & Service

Comprehensive LLY Duramax Maintenance Schedule & Service

2025-10-24
Top 10 LLY Duramax Problems & How to Fix Them Fast

Top 10 LLY Duramax Problems & How to Fix Them Fast

2025-10-23
L5P Duramax Specs & Engine Information You Need to Know

L5P Duramax Specs & Engine Information You Need to Know

2025-10-22
6.7 Powerstroke EGR Delete Pros and Cons You Must Know

6.7 Powerstroke EGR Delete Pros and Cons You Must Know

2025-10-21
What is the Best 6.7 Cummins Delete Kit? 2026 Buyer’s Guide

What is the Best 6.7 Cummins Delete Kit? 2026 Buyer’s Guide

2025-10-20
6.7 Cummins DPF Delete Pros & Cons: Is It Really Worth It?

6.7 Cummins DPF Delete Pros & Cons: Is It Really Worth It?

2025-10-15
LML Duramax EGR & DPF Delete: Pros and Cons (2026 Guide)

LML Duramax EGR & DPF Delete: Pros and Cons (2026 Guide)

2025-10-14
EGR Valve Explained: Function, Purpose, and Common Problems

EGR Valve Explained: Function, Purpose, and Common Problems

2025-10-13
Duramax L5P Reliability: Top 11 Common Issues & Fixes

Duramax L5P Reliability: Top 11 Common Issues & Fixes

2025-10-11
What is the Best Delete Kit for L5P Duramax in 2026?

What is the Best Delete Kit for L5P Duramax in 2026?

2025-10-10
6.7 Cummins Oil Capacity Guide: Quarts, Specs & Tips

6.7 Cummins Oil Capacity Guide: Quarts, Specs & Tips

2025-10-08
Consequences of Not Changing the 6.7 Cummins CCV Filter

Consequences of Not Changing the 6.7 Cummins CCV Filter

2025-09-30