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Upgrading Your 6.7L Cummins: Installing a Smeding Diesel Intake Horn

Installing a Smeding Diesel Intake Horn on a 6.7L Cummins

When upgrading your diesel, the first step is to make sure you have a clean and constant fuel supply (which we covered a few stories back in this issue) so your injection system has what it needs to feed your engine. The second step for this build is to un-restrict our air flow with this Smeding Diesel intake horn and billet intake plenum. This install is going to take the stock intake horn and plenum with the grid heater and replace it with some shiny, less-restrictive parts.

Some people will argue about the actual power gains achieved from just an intake horn swap. We’ve recently seen a test in higher HP applications from Lavon Miller at Firepunk Diesel where the aftermarket intake horn on a 6.7L Cummins didn’t actually gain power over the stock one—but no one can argue about the engine bay looking better, right?

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We’re almost to the finish line! Now that everything is reassembled and the intake plenum is installed, it’s time to install your new intake horn.

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This install is relatively easy to do. Not only does it look good, but it, in theory, has less restricted air moving from the charge pipes into your motor.

Thanks to Smeding Diesel for always supporting Diesel World and our builds!

First you’re going to want to get your engine bay prepped for taking the intake horn out by removing the bolt for the dipstick tube, loosen the charge boot from the bottom of the horn, and unplug the grid heater.

Once you’ve got your stock intake horn in view, remove the bolts that hold it to the head and get it out of the way.

As you can see, the grid heater is currently holding a little soot already from the miles on this Ram, and boy is it caked up! Now it’s time to get your fuel rail off the truck and safely put aside. Next, remove all the bolts from the intake plenum, and don’t forget to scrape the old gasket ALL the way off to ensure a good seal when putting on the new Smeding intake plenum.

Did you scrape that gasket off? Set your new one in place, line up your shiny new intake plenum, and torque the bolts to factory spec. Next, replace your fuel rail and tighten it down.

 

SOURCES

Smeding Diesel
www.smedingdiesel.com
@smedingdiesel

 

 

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