Spelab NEWs

6.7 Cummins EGR Problems: Diagnose Before Replacing Parts

Updated on July 31, 2026. Originally published on January 16, 2025. If a 6.7L Cummins EGR concern returns after one or two years, do not order another valve, cooler, or...

SPELAB 2013-2018 6.7L Cummins Intake Manifold: A Technical Deep Dive

Unleash your 6.7L Cummins. Our ultimate guide details the SPELAB intake manifold's engineered advantages, from its +45% airflow gain and superior cooling to a step-by-step installation overview.

Why CCV Deletion Is Required for 6.7 Cummins Valve Cover Upgrades

Upgrading to a billet valve cover on your 6.7 Cummins requires deleting the stock CCV filter. Learn why this modification is mandatory and how it improves engine longevity and intake...

Is Upgrading Your 6.7 Cummins Intake Manifold Worth It? Fact vs. Fiction

Stop choking your 6.7 Cummins. We explain why upgrading the intake horn boosts airflow, lowers EGTs, and prevents the catastrophic grid heater bolt failure. See the CFD analysis proof inside.

6.7 Cummins Intake Manifold Leak Diagnosis & Repair Guide

Updated: May 15, 2026 If you own a 6.7L Cummins and the truck suddenly feels lazy, smokes harder than usual, loses coolant, or shows oily residue around the intake horn,...

Intake Manifold Fault Codes: What P0106, P0171, P2004 & P2015 Really Mean

Updated on July 22, 2026. Intake manifold fault codes such as P0106, P0171, P0174, P2004, and P2015 do not automatically mean the intake manifold is bad. This guide covers both...

Can a 6.7 Cummins Intake Horn Upgrade Cause Fault Codes or Problems?

Updated on August 11, 2026. The stock 6.7 Cummins intake horn has real, well-documented weak points - not a mystery fault code. The factory design restricts airflow, distributes air unevenly...

How to Choose the Right Intake Manifold for Your 351 Windsor Engine

Building a 351W? Discover whether you need a Single-Plane or Dual-Plane intake manifold for street performance. Plus, expert installation tips to prevent common oil leaks.

Why Does A New Valve Cover Still Leak Oil?

A Mechanic’s Guide to Choosing the Right Differential Cover

Choosing the right differential cover can be confusing. This expert guide debunks common myths and analyzes materials to help you pick the perfect cover for your truck's specific towing or...