2021 6.7L Cummins Going Back To A CP3?

[TurboWhistle]

Looks like the 2021 CP3 only has one high pressure line?

Or am I missing it?


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I just did the CP3 conversion on my 2019 and it only had 1 high pressure line.

The other one is capped

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[Pooh Bear]

I just did the CP3 conversion on my 2019 and it only had 1 high pressure line.

The other one is capped

Ya I just find it interesting because S&S came out with that kit plugging one of the lines and industrial injection kit has two high pressure lines.

Then RAM made the switch back to the CP3 and set it up with one high pressure line.

I can’t remember if the 4th Gens had two lines or one?

Seems like the S&S kit is the way to go for us 19&20’s guys.

Was the install easy and straightforward?


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[Pooh Bear]

Wonder when the 2021 parts will be made available and at what cost so us 19&20’s guys could do a swap? Wonder if it will be any cheaper than a S&S or II kit?


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[Cam95]

Wonder when the 2021 parts will be made available and at what cost so us 19&20’s guys could do a swap? Wonder if it will be any cheaper than a S&S or II kit?


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They are available already but the front timing cover is totally different and using a different gear drive set up. I’m waiting to get my hands on a second 21 to tear apart and see what can be done using factory parts.

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[TurboWhistle]

Ya I just find it interesting because S&S came out with that kit plugging one of the lines and industrial injection kit has two high pressure lines. Then ram made the switch back to the CP3 and set it up with one high pressure line. I can’t remember if the 4th gens had two lines or one? Seems like the S&S kit is the way to go for us 19&20’s guys. Was the install easy and straight forward?


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I'm not sure why there's 2 lines on the industrial kit.

Perhaps because it can sustain a higher HP?

The install isn't horrible , but it isn't easy either.

It took me about 6 hours to do by myself. I took my time and skipped on removing the egr crossover tube.

I'd recommend removing the throttle valve and there's no way in avoiding disconnecting and removing the ECM, I tried LOL.

The new mount won't fit without it being out of the way. I do recommend connecting the green ECM plug prior to mounting the ECM.

The inboard CP3 mounting bolt can be a real chore as well.

I've got 24k miles on my CP4 and i'm going to tear it apart this coming week and provide feedback on it

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[TexNeck]

Not for sure but my logic to Industrial using 2 lines is their “stock” replacement is a 10mm pump so it’ll hold around 800hp.

S&S uses a standard 8.2mm pump so more of a “stock” fueling system relatively speaking.

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[Pooh Bear]

I'm not sure why there's 2 lines on the industrial kit.

Perhaps because it can sustain a higher HP?

The install isn't horrible , but it isn't easy either.

It took me about 6 hours to do by myself. I took my time and skipped on removing the egr crossover tube.

I'd recommend removing the throttle valve and there's no way in avoiding disconnecting and removing the ECM, I tried LOL.

The new mount won't fit without it being out of the way. I do recommend connecting the green ECM plug prior to mounting the ECM.

The inboard CP3 mounting bolt can be a real chore as well.

I've got 24k miles on my CP4 and i'm going to tear it apart this coming week and provide feedback on it

Thanks for the information.

Look forward to hearing what the inside of your CP4 looks like.


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[dgfunny70]

My warranty and the CP4 are the two things holding me back from tuning my truck.

If I had a CP3 I might consider moving forward with tuning the truck.

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