Killer Grid Heater for Cummins 6.7L: The Smart, Emissions-Compliant Fix

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Built to solve the 6.7L grid heater failure—without sacrificing cold-start performance.

When a fix is simple, reliable, and affordable, you do it. The BD Diesel Killer Grid Heater addresses the well-known 6.7L Cummins grid heater failure—without deleting heat output, without special tuning, and without breaking the bank. It’s a stock-function, emissions-compliant upgrade that’s usually in stock and ready to ship.

Why the 6.7L Needs This Upgrade

From 2007 onward, the 6.7L Cummins routes up to ~200 amps through a small bolt and nut inside the intake grid heater. Over time that connection can deteriorate, arc, and break off. When it does, that nut can drop into the engine, risking catastrophic damage to the piston, head, and valves.

Many “solutions” out there simply remove or downsize the heater element. That reduces heat output, hurts cold starts, and often requires tuning. BD’s approach is different: keep the factory heater’s full output—but eliminate the failure point.

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bottom: OEM small-nut connection inside the intake. top: BD’s direct-to-busbar solution that removes the internal fastener risk.

How the BD Killer Grid Heater Works

  • Eliminates the weak link: BD’s design removes both problematic nuts inside the intake by fastening directly into the lower busbar.
  • Full stock heat output: You keep the factory grid heater’s effectiveness for reliable cold starts and winter drivability.
  • Self-locking threads: Built into the lower busbar to prevent backing out and losing electrical connection.
  • Emissions compliant: Retains OE function and is designed to be compliant without tuning.
  • Complete kit: Includes replacement hardware, gaskets, and special tools needed for the job.

BD vs. Overpriced Swaps

Some competing “fixes” replace the grid heater with pricey intake swaps that cut heater output and often rely on tuning to mask the change. That’s a problem in cold climates and a headache for emissions checks. The BD Killer Grid Heater:

  • Costs less than large, multi-part swaps
  • Maintains full heater output for easy starts and smooth idle in winter
  • Avoids tuning and keeps OE strategies happy
  • Is usually in stock and ready to ship from BD

Fitment & What’s Included

Coverage: DODGE/RAM 6.7L Cummins 2500/3500 Pick-Up & 3500/4500/5500 Cab & Chassis, 2007–2024

Kit contents: Killer Grid Heater assembly with direct-busbar connection, replacement hardware and gaskets, and special tools required for installation.

Product page: BD Killer Grid Heater (Patent pending, SEMA Certification No. SC-BDD01-0135)

Install Time, Notes & Instructions

  • Install time: ~3 hours
  • 2007–2012 note: Minor modification—use a Dremel or hacksaw to remove an aluminum tab on the grid heater (see manual)
  • Full instructions: Download the installation manual

Specs, Warranty & Certification

Function Retains full OE grid heater heat output; solves internal fastener failure
Electrical Path Direct-to-busbar connection; eliminates small internal nuts
Compliance Emissions compliant; no tuning required
Certification SEMA Certification No. SC-BDD01-0135; Patent pending
Install Time ~3 hours (see 2007–2012 note in manual)
Warranty Parts: 12 months  |  Terms: BD Terms & Conditions

Building a reliable winter/tow setup? Pair the Killer Grid Heater with: BD VGT turbos (2013–2018), cast exhaust manifolds (’13–’18 & ’19–’24), and a cooler-flow upgrade for the transmission: 68RFE Thermostat Bypass.

Frequently Asked Questions

Will I lose heater performance in cold weather?
No. The BD Killer Grid Heater retains full OE heat output for strong cold starts and smoother warm-up.

Does this require tuning?
No. It is designed to work with factory strategies and remain emissions compliant.

What years and trucks does it fit?
DODGE/RAM 6.7L Cummins 2500/3500 Pick-Up and 3500/4500/5500 Cab & Chassis, 2007–2024 (see manual for notes).

Is it usually in stock?
Yes—BD keeps the Killer Grid Heater typically in stock and ready to ship. Check current availability on the product page.

Make the Smart Fix Today

Don’t wait for an internal nut to end your engine. Upgrade once, keep your heat, and stay compliant. Order the BD Killer Grid Heater — usually in stock, ready to ship.

 

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