SKU: 96271710279

H&S Motorsports Dual High Pressure Fuel Kit with CP3 11-16 6.6L Duramax

Sale price$1358.55 Regular price$1509.50
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Description

H&S Motorsports Dual High Pressure Fuel Kit with CP3 11-16 6.6L DuramaxThe potential of the LML Duramax to deliver unreal power has been proven. Simple programming and exhaust modifications have pushed these engines well past the 500 RWHP mark with ease. And as diesel enthusiasts typically do, the limits are being pushed to see what kind of power can be pulled from these trucks. One of the limitations found is the factory CP4 injection pump. While this has shown (so far) to be a reliable pump, it's also shown to be

The potential of the LML Duramax to deliver unreal power has been proven. Simple programming and exhaust modifications have pushed these engines well past the 500 RWHP mark with ease. And as diesel enthusiasts typically do, the limits are being pushed to see what kind of power can be pulled from these trucks. One of the limitations found is the factory CP4 injection pump. While this has shown (so far) to be a reliable pump, it's also shown to be essentially a bottleneck. When trucks are pushed above the 500 horsepower mark, the additional power gains begin to diminish due largely in part to the lack of rail pressure. Because of this, HS Motorsports has developed a dual pump system to cure this issue, and deliver enough fueling to support 900+ horsepower!

Just as a quick reference for you diesel nuts out there, the engineers at HS Performance were able to run 3800us (not recommended) of main injection duration on stock injectors without a drop in rail pressure. So what does that mean? Well, think about it this way; their off-the-shelf HOT tune commands around 1400us and is on the verge of draining the rail on a stock CP4-equipped truck. At 3800us, that is a 270% increase in fuel demand from their HOT tune and limit of the stock CP4. The HS Motorsports Dual High Pressure Fuel Kit was able to maintain the commanded 29,000 PSI rail pressure without skipping a beat.

One of the HUGE benefits to this system is that it includes a BRAND NEW CP3 from Bosch. That's right, BRAND NEW, not a remanufactured unit like many other companies utilize. The key to ensuring the longevity of any high pressure fuel pump is by providing the high pressure fuel system with clean, waterless diesel fuel. Any fuel contamination that reaches the high pressure fuel system can be detrimental to reliability and performance. Because of this, we highly recommend using a FASS, AirDog or similar lift pump for proper filtration and water-separation.

Why does HS use a CP3 in instead of a CP4?

There are a few reasons they chose the CP3 over the CP4:
  • The CP3 pump has been proven to be reliable. This pump technology has been used on the Cummins and Duramax platform for years.
  • While the CP4 has the capability of delivering higher pressures, it lacks the volume of the CP3. With both pumps installed, you get the best of both worlds - high pressure and high volume.
  • Price. With the CP4 being a newer pump, it is obviously more expensive. By saving on the pumps included with the kit, we can pass that savings directly on to the customer.
  • If your fueling demands exceed what the stock CP3 and CP4 are capable of providing, one of HS' 6.7L Cummins 10MM Stroker pumps can easily be used as a replacement while still being able to re-use all fittings and lines included with the kit.
IMPORTANT NOTES:
  • This product will NOT work with trucks that have dual alternators. The HS Motorsports CP3 pump is mounted where a dual alternator would be located.
  • This product may not work with the EGR cooler installed. It may need to be removed.
  • This product MUST be used in conjunction with custom tuning calibration. Failure to install the correct calibrations can result in engine damage.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 96271710279

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4.0 ★★★★★
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Captain Al
Louisville, US
★★★★★ 5
This stuff works!
Size: 32 oz
I was sceptical but wanted to avoid replacing 2 rear tires on my zero turn mower. The tires were leaking air and had bad sidewall cracking. I found the use of the product to be easy and quick. I aired up the tires and rode around the yard a few minutes to distribute the product in the tires. It has been 4 days and both tires remain aired up. Previously both tires would already be flat within this timeframe. Excellent results for me!
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Reviewed in the United States on May 18, 2026
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james Bays. Yup
Grantham, US
★★★★★ 1
Doesn’t work for a car Tire seal slow leak
Size: 16 oz
Does not work for a car tire. Had a slow rim seal leak. Out 32oz in still leaks the same. Do not buy. I got the one with fibers in it. It worked just fine. This does not work. Period. $30 wasted actually I purchased two so I wasted $60 when I could’ve bought probably a new tire
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Reviewed in the United States on April 8, 2026
R
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Rebecca Parker
Lexington, US
★★★★★ 5
#1 Tire Repair
Size: 16 oz
This stuff is Fantastic. I have a riding lawn mower and one of the front tires, which is small, had been running low for a couple of years, we took it off. to fill it with the liquiTube and you could see cracks all around the outside of the tire. The liquid tube oozed out of one of the cracks and sealed , immediately. My brother rolled the tire around real good before we put it back on the track lawn mower. It has been 3 days now and today I mowed for 1 1/2 hrs and the tire as full as it was the day we put in the LiquiTube. This stuff is fantastic, it really, really works!
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Reviewed in the United States on May 31, 2026
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Jana
Carnegie, US
★★★★★ 4
Awesome
Size: 32 oz
Works as advertised. Just don't scrimp... give it the full recommended amount in each tire
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Reviewed in the United States on May 27, 2026
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kevin weir
Phoenix, US
★★★★★ 5
This tire sealant works very well
Size: 16 oz
So far so good. Cheaper and easier that tubing a leaking tire
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Reviewed in the United States on May 24, 2026

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