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

6.7 Cummins DPF Delete Problems: What to Know Before Delete

6.7 Cummins DPF Delete Problems: What to Know Before Delete

2026-08-14
Install an Oil Catch Can: PCV Setup and Routing Walkthrough

Install an Oil Catch Can: PCV Setup and Routing Walkthrough

2026-08-13
What is Best 6.7 Powerstroke Tuner for Towing or Daily Use?

What is Best 6.7 Powerstroke Tuner for Towing or Daily Use?

2026-08-12
Muffler Delete Pros and Cons: Sound, Drone, Is It Worth It?

Muffler Delete Pros and Cons: Sound, Drone, Is It Worth It?

2026-08-10
Best DFM Disabler for GM Trucks and SUVs: A Comparison Guide

Best DFM Disabler for GM Trucks and SUVs: A Comparison Guide

2026-08-07
Is a DOD/AFM Delete Legal? CARB, Smog Check & Warranty Risks

Is a DOD/AFM Delete Legal? CARB, Smog Check & Warranty Risks

2026-08-05
Delete AFM on a 5.3L Chevy Engine: Mechanical & Tuning Guide

Delete AFM on a 5.3L Chevy Engine: Mechanical & Tuning Guide

2026-08-04
How to Install a 6.7 CP4 Disaster Prevention Kit? 12 Steps

How to Install a 6.7 CP4 Disaster Prevention Kit? 12 Steps

2026-08-03
3.0 EcoDiesel EGR Delete Instructions for 2014-2019 Ram 1500

3.0 EcoDiesel EGR Delete Instructions for 2014-2019 Ram 1500

2026-07-31
Walkthrough: How to Install a 6.4 Powerstroke EGR Delete Kit

Walkthrough: How to Install a 6.4 Powerstroke EGR Delete Kit

2026-07-29
Install a Ford 6.7 EGR Delete Kit: 2011–2019+ Complete Guide

Install a Ford 6.7 EGR Delete Kit: 2011–2019+ Complete Guide

2026-07-27
Powerstroke Tuning & Deletes Guide: 6.0, 6.4 & 6.7 Engines

Powerstroke Tuning & Deletes Guide: 6.0, 6.4 & 6.7 Engines

2026-07-25
Best EGR Delete Kit LML Duramax: Top Picks for 2011-2016

Best EGR Delete Kit LML Duramax: Top Picks for 2011-2016

2026-07-24
6.7 Powerstroke CCV Reroute vs Delete: Pros, Cons & Verdict

6.7 Powerstroke CCV Reroute vs Delete: Pros, Cons & Verdict

2026-07-23
How to Delete DPF from ECU: Step-by-Step Tuning Guide (2026)

How to Delete DPF from ECU: Step-by-Step Tuning Guide (2026)

2026-07-21
3 Best 6.7 Powerstroke EGR Delete Kits by Fitment & Value

3 Best 6.7 Powerstroke EGR Delete Kits by Fitment & Value

2026-07-20
LML Problems: Common Duramax Issues, Fixes & Upgrades

LML Problems: Common Duramax Issues, Fixes & Upgrades

2026-07-16
Is a Cat Delete Worth It? Methods, Benefits & Legal Risks

Is a Cat Delete Worth It? Methods, Benefits & Legal Risks

2026-07-15
Bad Fuel Pressure Regulator Signs: How to Spot, Test & Fix

Bad Fuel Pressure Regulator Signs: How to Spot, Test & Fix

2026-07-14
Can I Delete a DEF System? Legal Risks & Better Alternatives

Can I Delete a DEF System? Legal Risks & Better Alternatives

2026-07-11
Common LB7 Problems, Symptoms, Fixes & Performance Upgrades

Common LB7 Problems, Symptoms, Fixes & Performance Upgrades

2026-07-10
Is a Catback Exhaust Legal? Laws, Noise Limits & Compliance

Is a Catback Exhaust Legal? Laws, Noise Limits & Compliance

2026-07-09
6.0 Powerstroke Oil Capacity: How Much Oil Does It Take?

6.0 Powerstroke Oil Capacity: How Much Oil Does It Take?

2026-07-07
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