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

How GM Cylinder Deactivation Causes Excessive Oil Consumption

How GM Cylinder Deactivation Causes Excessive Oil Consumption

2026-09-28

Best Duramax EGR Delete Kits: Engine-by-Engine Review (2026)

Best Duramax EGR Delete Kits: Engine-by-Engine Review (2026)

2026-09-25

EGR Valve Change Guide: Symptoms, Costs, Tools & Installation

EGR Valve Change Guide: Symptoms, Costs, Tools & Installation

2026-09-22

6.4 Powerstroke Oil Capacity: 15 Quarts, Oil Type & Change

6.4 Powerstroke Oil Capacity: 15 Quarts, Oil Type & Change

2026-09-21

Deleted and Tuned L5P Horsepower: HP Gains and Tuning Guide

Deleted and Tuned L5P Horsepower: HP Gains and Tuning Guide

2026-09-20

How to Delete EGR on LLY Duramax: Torque Specs and Tuning

How to Delete EGR on LLY Duramax: Torque Specs and Tuning

2026-09-19

Horsepower Gains from Shorty & Long-Tube Headers: Real Dyno

Horsepower Gains from Shorty & Long-Tube Headers: Real Dyno

2026-09-17

How to Delete EGR on LMM Duramax: Instructions & Parts Guide

How to Delete EGR on LMM Duramax: Instructions & Parts Guide

2026-09-16

4 vs 5 Inch Exhaust on 6.7 Cummins: Sound, HP, Drone Compared

4 vs 5 Inch Exhaust on 6.7 Cummins: Sound, HP, Drone Compared

2026-09-15

L5P CAN Bus Plug Installation: Step-by-Step Guide 2017–2025

L5P CAN Bus Plug Installation: Step-by-Step Guide 2017–2025

2026-09-13

Does a Muffler Delete Affect MPG? Real Impact on Fuel Economy

Does a Muffler Delete Affect MPG? Real Impact on Fuel Economy

2026-09-10

How Much Does a DPF Delete Cost? 2026 Price Breakdown

How Much Does a DPF Delete Cost? 2026 Price Breakdown

2026-09-09

Delete EGR on 3.0 Powerstroke: Cost, MPG Gains, Installation

Delete EGR on 3.0 Powerstroke: Cost, MPG Gains, Installation

2026-09-08

LBZ PCV Reroute Benefits: Engine Protection & Improve Airflow

LBZ PCV Reroute Benefits: Engine Protection & Improve Airflow

2026-09-07

Best DPF Delete Kit: Comparing Top Brands by Fitment & Price

Best DPF Delete Kit: Comparing Top Brands by Fitment & Price

2026-09-05

How to Do a Muffler Delete: Installation and Cost Breakdown

How to Do a Muffler Delete: Installation and Cost Breakdown

2026-09-04

6.0 Powerstroke MPG After EGR Delete: Realistic Fuel Economy

6.0 Powerstroke MPG After EGR Delete: Realistic Fuel Economy

2026-09-03

Best CP3 Conversion Kit for LML Duramax: Brands Comparison

Best CP3 Conversion Kit for LML Duramax: Brands Comparison

2026-09-02

Best Duramax Delete Kit:  Bundles for LBZ, LMM, LML & L5P

Best Duramax Delete Kit: Bundles for LBZ, LMM, LML & L5P

2026-09-01

PCV System Problems: Diagnostic Testing & Repair Solutions

PCV System Problems: Diagnostic Testing & Repair Solutions

2026-08-31

How Much Does It Cost to Delete a 6.6 Duramax? Price in 2026

How Much Does It Cost to Delete a 6.6 Duramax? Price in 2026

2026-08-30

Install L5P CCV Reroute for 2017–2025 Duramax: Expert Guide

Install L5P CCV Reroute for 2017–2025 Duramax: Expert Guide

2026-08-28

P242F 6.7 Cummins: Learn Ash Accumulation, Symptoms, and Fix

P242F 6.7 Cummins: Learn Ash Accumulation, Symptoms, and Fix

2026-08-25

P2002 Bank 1: DPF Efficiency Below Threshold - Correct Fixes

P2002 Bank 1: DPF Efficiency Below Threshold - Correct Fixes

2026-08-23

Best EcoDiesel Delete Kit for Ram 1500: EGR, DPF & Full Kits

Best EcoDiesel Delete Kit for Ram 1500: EGR, DPF & Full Kits

2026-08-20

Muffler Delete vs. Straight Pipe: Sound, HP & How to Choose

Muffler Delete vs. Straight Pipe: Sound, HP & How to Choose

2026-08-19

Best Oil Catch Can: Direct-Fit Picks for Turbo Diesel Engine

Best Oil Catch Can: Direct-Fit Picks for Turbo Diesel Engine

2026-08-17

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