DIY: Inexpensive Cold Air Intake for Your 3rd-gen Ram

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Stock 3g Ram Hemi Engine

Your Hemi Ram will breathe easier and sound better with this simple $62 modification.

Cold air intakes add some power and a whole lot of sound to the Hemi Ram, but the cost of some kits is nothing short of outrageous. Fortunately, forum member ryanbum put together a great DIY showing how to make a cold air intake for your Hemi that will flow just as well as any plastic intake, but for a fraction of the price.


When the OP introduced us to his third-gen Hemi Ram cold air intake DIY, he explained that he was unable to find a good how-to article pertaining to a homemade CAI for his truck, so he decided to make one to share with the forum. He opened by explaining the basic items needed for the project, along with including the prices for each item.

“Well guys, I have been researching this for a few weeks now and found pictures of completed home made cold air intakes, but never a how-to article or progress pictures. I now know that there are no write ups on how to make one because it’s really simple. BUT, for the guys that are still questioning whether to do it or not or want to see my setup, here it is.

Here is the list of parts I bought at the local hardware store:
-5′ section of 3″ PVC pipe- $8
-1 90* Street Bend elbow- $3.50
-1 90* Elbow- $2.50
-1 3″-3″ Rubber coupler- $6.50
-PVC Glue- $3
Parts at O’ Reilly
-Spectre cone air filter- $25
-Spectre mini filter- $10
Parts at Wal-Mart
-1 Can of Krylon Fusion satin black- $4
Made my own brackets out of scrap metal laying around the house.”

He also included an image of his stock engine bay (above) with the factory Hemi air intake system.

Hemi Ram DIY Intake Parts


While you could spend a couple hundred dollars (or more) on a plastic cold air intake kit for your Hemi Ram, the OP shows how easy it is to build your own intake and install it. In his thread, he offers a quick rundown of how to remove the stock air box system before explaining how he crafted his custom intake from PVC piping, an average auto show cone filter, some glue and some paint.

Hemi Ram CAI IAT

Aside from cutting the piping to the right lengths and gluing the pieces together at the proper angles, the most detailed aspect of the build is to install the IAT sensor hole in the bend closest to the throttle body. You have to make sure that you make the hole tight enough to hold the sensor safely and it needs to be located where the wiring harness can comfortably reach, but the rest of the project is very simple.

Hemi Ram CAI Installed

He also bought a small conical filter to go on the breather hose, as the standard Hemi air box has a port to accept the breathe hose, but it isn’t required. You just want to put something on that hose to keep it from spraying oil in the engine bay or to prevent any foreign objects getting into that hose.

Hemi Ram Engine Bay CAI

In total, everything that the OP bought for this project cost less than $63 and while it might not be as pretty as the $400 kits, it flows just as well and offer the same thermodynamic advantages of any plastic cold air intake kit. Most owners will tell you that the intake frees up a little power, but more importantly, the Hemi engine sounds far better without the factory air box.

Click here to check out the Hemi Ram cold air intake DIY yourself.

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Longtime auto journalist Patrick Rall contributes to Ford Truck Enthusiasts, Rennlist, Club Lexus, F-150 Online, and YotaTech.

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