Mark Peterson

Hi, I'm Mark Peterson. With 20 years under the hood of heavy-duty diesel trucks, I’ve seen every wrench turn and sensor failure imaginable.

As the lead editor at EGR Performance, my mission is to help Powerstroke, Cummins, and Duramax owners push their engines to the limit without the headaches of Limp Mode or endless CEL codes. I don't just review parts—I provide field-tested solutions based on two decades of diagnostic data.

Mark Peterson's Articles

Dodge Active Exhaust System: Is it Worth the Extra Money?

Dodge Active Exhaust System: Is it Worth the Extra Money?

2026-07-02
P2609 Code 6.7 Cummins: Causes, Symptoms, and Fix Guide

P2609 Code 6.7 Cummins: Causes, Symptoms, and Fix Guide

2026-07-01
6.7 Cummins Grid Heater Delete Pros and Cons: Is It Worth It?

6.7 Cummins Grid Heater Delete Pros and Cons: Is It Worth It?

2026-06-26
2004.5–2005 LLY Duramax Guide: Specs, Problems & Upgrades

2004.5–2005 LLY Duramax Guide: Specs, Problems & Upgrades

2026-06-25
P2459 Code 6.7 Cummins: Causes, Fix Methods & Repair Costs

P2459 Code 6.7 Cummins: Causes, Fix Methods & Repair Costs

2026-06-24
Is a Muffler Delete Illegal? Understand Laws, Fines & Risks

Is a Muffler Delete Illegal? Understand Laws, Fines & Risks

2026-06-23
Diesel Engine Block Heater Guide: Everything You Need to Know

Diesel Engine Block Heater Guide: Everything You Need to Know

2026-06-22
L5P Delete: Full Pros and Cons Breakdown (2026 Update)

L5P Delete: Full Pros and Cons Breakdown (2026 Update)

2026-06-18
Deleted 6.7 Cummins with Tuning: Real Horsepower Expectation

Deleted 6.7 Cummins with Tuning: Real Horsepower Expectation

2026-06-17
Oil Catch Can Benefits, How It Works & Engine Protection

Oil Catch Can Benefits, How It Works & Engine Protection

2026-06-16
P0475 Code 7.3 Powerstroke: EBP Sensor, Tube, and EBPV Fixes

P0475 Code 7.3 Powerstroke: EBP Sensor, Tube, and EBPV Fixes

2026-06-15
Exhaust Repair Cost 2026: Average Prices and Repair Guide

Exhaust Repair Cost 2026: Average Prices and Repair Guide

2026-06-12
How to Bypass Dodge Active Exhaust Without CEL or Limp Mode

How to Bypass Dodge Active Exhaust Without CEL or Limp Mode

2026-06-11
Exhaust Simulator vs Mechanical Delete: 2026 Comparison Guide

Exhaust Simulator vs Mechanical Delete: 2026 Comparison Guide

2026-06-10
Best Duramax Tuner: Complete Guide for Every Model (LB7–L5P)

Best Duramax Tuner: Complete Guide for Every Model (LB7–L5P)

2026-06-09
How to Delete EGR on LML Duramax: Step-by-Step Installation

How to Delete EGR on LML Duramax: Step-by-Step Installation

2026-06-06
4 vs 5 Inch Exhaust 6.7 Powerstroke: Sound, Towing & Fitment

4 vs 5 Inch Exhaust 6.7 Powerstroke: Sound, Towing & Fitment

2026-06-05
LBZ EGR Delete Pros & Cons: A Full Guide for Duramax Owners

LBZ EGR Delete Pros & Cons: A Full Guide for Duramax Owners

2026-06-04
L5P Delete Instructions: Step-by-Step EGR & DPF Guide 2017–2026

L5P Delete Instructions: Step-by-Step EGR & DPF Guide 2017–2026

2026-06-02
Step-by-Step LBZ EGR Delete Instructions: 2006–2007 Duramax

Step-by-Step LBZ EGR Delete Instructions: 2006–2007 Duramax

2026-06-01
Can You Delete an L5P Duramax? Costs, Tuning & Legal Risks

Can You Delete an L5P Duramax? Costs, Tuning & Legal Risks

2026-05-31
Best Upgrades for L5p Duramax: Enhance Power and Reliability

Best Upgrades for L5p Duramax: Enhance Power and Reliability

2026-05-30
Dodge Charger Active Exhaust Rattle: Symptoms & Fixes

Dodge Charger Active Exhaust Rattle: Symptoms & Fixes

2026-05-29
Dodge Active Exhaust Delete Kit Installation: Step-by-Step

Dodge Active Exhaust Delete Kit Installation: Step-by-Step

2026-05-28
Dodge Exhaust Upgrades with Valve Simulators: Fix CEL Codes

Dodge Exhaust Upgrades with Valve Simulators: Fix CEL Codes

2026-05-26
6.7 Cummins EGR Valve Maintenance: Clean, Replace, or Delete?

6.7 Cummins EGR Valve Maintenance: Clean, Replace, or Delete?

2026-05-25
Does EGR Delete Increase MPG? Real Data for Diesel Owners

Does EGR Delete Increase MPG? Real Data for Diesel Owners

2026-05-22
EGR Delete & Black Smoke: Common Causes and Easy Fixes

EGR Delete & Black Smoke: Common Causes and Easy Fixes

2026-05-21
6.7 Cummins Delete Guide: Costs, Benefits & Risks Explained

6.7 Cummins Delete Guide: Costs, Benefits & Risks Explained

2026-05-20
How to Identify and Fix a 6.7 Powerstroke Oil Leak Fast

How to Identify and Fix a 6.7 Powerstroke Oil Leak Fast

2026-05-19
6 Leaking Valve Cover Gasket Symptoms You Shouldn't Ignore

6 Leaking Valve Cover Gasket Symptoms You Shouldn't Ignore

2026-05-18
DPF Delete Guide: Pros, Cons & Long-Term Cost Breakdown

DPF Delete Guide: Pros, Cons & Long-Term Cost Breakdown

2026-05-17
How to Fix a P0299 Code on 6.7 Powerstroke Diesel

How to Fix a P0299 Code on 6.7 Powerstroke Diesel

2026-05-15
6.7 Powerstroke CP4 Replacement Guide & Best Upgrade Options

6.7 Powerstroke CP4 Replacement Guide & Best Upgrade Options

2026-05-13
6.0 Stand Pipe and Dummy Plug Replacement: Steps and Costs

6.0 Stand Pipe and Dummy Plug Replacement: Steps and Costs

2026-05-12
Mini Maxx Tuner Review: Features, Gains & V1 vs V2 Guide

Mini Maxx Tuner Review: Features, Gains & V1 vs V2 Guide

2026-05-10
Mini Maxx Tuner Installation: Fast & Error-Free Setup

Mini Maxx Tuner Installation: Fast & Error-Free Setup

2026-05-08
How to Fast Diagnose & Fix 7.3 Powerstroke P1249 Code

How to Fast Diagnose & Fix 7.3 Powerstroke P1249 Code

2026-05-06
7.3 Powerstroke P1316 Code: Symptoms, Causes & Fixes

7.3 Powerstroke P1316 Code: Symptoms, Causes & Fixes

2026-05-04
7.3 Powerstroke Performance Upgrades to Boost Power & Reliability

7.3 Powerstroke Performance Upgrades to Boost Power & Reliability

2026-05-02
7.3 EBPV Delete: Pros, Cons & Performance Impact Explained

7.3 EBPV Delete: Pros, Cons & Performance Impact Explained

2026-04-30
Replace a 7.3 PowerStroke Engine Harness 94-03: 12 Easy Steps

Replace a 7.3 PowerStroke Engine Harness 94-03: 12 Easy Steps

2026-04-28
DIY Instruction: How to Delete EBPV on 7.3 PowerStroke

DIY Instruction: How to Delete EBPV on 7.3 PowerStroke

2026-04-26
Is an EGR Delete Still Illegal? 2026 Federal Law & EPA Rules

Is an EGR Delete Still Illegal? 2026 Federal Law & EPA Rules

2026-04-24
OEM vs Aftermarket Tuner Harness Plug: Which Kit is for You?

OEM vs Aftermarket Tuner Harness Plug: Which Kit is for You?

2026-04-22
Buy Diesel Tuner Harness Plugs Online: Best Kits & Retailers

Buy Diesel Tuner Harness Plugs Online: Best Kits & Retailers

2026-04-20
11 Common 7.3 PowerStroke Problems You Should Know

11 Common 7.3 PowerStroke Problems You Should Know

2026-04-17
7 Bad 6.7 Cummins EGR Valve Symptoms You Shouldn’t Ignore

7 Bad 6.7 Cummins EGR Valve Symptoms You Shouldn’t Ignore

2026-04-15