SKU: 56453689095

2017-2026 L5P Duramax CP3 Conversion Kit W/ 14MM Pump Competition Use Only Each S&S Diesel

$1755.00 $1950.00
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Ships within 48 hours · Estimated delivery Jul 13 - Jul 18

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Description

2017-2026 L5P Duramax CP3 Conversion Kit W/ 14MM Pump Competition Use Only Each S&S DieselDesigned for high performance and competition diesel applications, the S&S Diesel CP3 Conversion replaces the factory high pressure pump with a proven Bosch based CP3 platform, delivering consistent fuel volume, improved durability, and superior RPM stability. Each pump starts as a brand new Bosch CP3 core and is precision modified in house by S&S Diesel Motorsport for maximum reliability and output. The result is smooth, linear fuel delivery all the

Designed for high-performance and competition diesel applications, the S&S Diesel CP3 Conversion replaces the factory high-pressure pump with a proven Bosch-based CP3 platform, delivering consistent fuel volume, improved durability, and superior RPM stability.

Each pump starts as a brand-new Bosch CP3 core and is precision-modified in-house by S&S Diesel Motorsport for maximum reliability and output. The result is smooth, linear fuel delivery all the way to 4,000 RPM while maintaining excellent efficiency and drivability.

This conversion is fully compatible with the factory low-pressure supply pump and includes an individual test report verifying flow and performance prior to shipment.

  • Improved high-pressure fuel pump conversion for competition engines
  • New Bosch base CP3 modified by S&S
  • Maintains linear output and efficiency up to 4,000 RPM
  • Compatible with the factory supply pump
  • Test report included with each pump
  • Available with a 10mm, 12mm, or 14mm stroker CP3
  • Fits 2017 to current GM trucks with the L5P Duramax

Details:

  • Engine Manufacturer: Duramax
  • Engine Destination: LP5
  • Engine Years: 2017-2026
  • Fuel Type: Diesel
  • Size: 14mm
  • Sold As: Kit
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: 56453689095

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4.5 ★★★★★
Based on 2065 reviews
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Steven D
Pawtucket, US
★★★★★ 5
Exact item ordered, quick delivery
Size: 9.5, Color: Black Polished Full Grain
I ordered these black Cole Haan penny loafers for casual wear with jeans, khakies, and even business casual with slacks and a jacket. They've always worked perfectly for these uses. The Cole Haan version is the most versatile and still meets my sophisticated look criteria. I wear a 9 1/2 M with almost all other shoes. I have found Cole Haan to run slightly wider and slightly shorter. This fit will work with thin and no socks and a little loose in width. . I'd likely order a 10 N next time. I tend to forget this but it runs consistent with me for Cole Haan. 5 stars for the shoe and service. My bad on the slightly off fit.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on January 8, 2025
H
Verified Purchase
Hugh62
Houston, US
★★★★★ 1
Poor quality control - maybe outlet store leftovers
Size: 11.5, Color: Burgundy Polished Full Grain
The two shoes were not the same size. They were both labeled 11 1/2 but one shoe was larger than the other and the fit was poor. I returned the first pair and ordered a replacement. This time the shoes were close to the same size but too loose and the left one has sewing issues. I've bought Johnston & Murphy for years because of the quality. These were to replace an existing pair of burgundy penny loafers that have finally worn out (even after several heal/sole replacements). That is the expected quality. I suspect Nashville Shoe Warehouse may be handling shoes that didn't measure up for the quality; more like an outlet mall than getting the J&M quality I've come to expect. Update: went to Johnston & Murphy site to buy "direct" from the manufacturer. There were several recent reviews where the shoes were long and didn't fit properly. Genesco - please step up the manufacture / crafting of these classic shoes to the level of quality they used to have.
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Reviewed in the United States on July 21, 2025
F
Verified Purchase
Fabric Crazy
Los Angeles, US
★★★★★ 5
Really nice shoes
Size: 9, Color: Black Polished Full Grain
My husband enjoys wearing these shoes. Very classy looking. They fit well. They arrived quickly. He liked them so much he ordered another pair in a different color which have worked out just as well.
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Reviewed in the United States on February 3, 2026
T
Verified Purchase
tjw
Alexandria, US
★★★★★ 3
Way too narrow
Size: 9.5 Wide, Color: Burgundy Polished Full Grain
I ordered a wide in this shoe, but it was still way too narrow. I had to return them. Otherwise, it looked like a nice quality shoe.
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Reviewed in the United States on February 12, 2026
B
Verified Purchase
BetterEveryDay
Battle Creek, US
★★★★★ 5
I usually wear 11.5's, but I buy 1/2 size smaller to accommodate for stretch. Leather relaxes.
Size: 11, Color: Burgundy Polished Full Grain
5 STARS: These shoes are awesome. I keep coming back for more. I have major foot problems, have tried all kinds of shoes, orthotics, and inserts... but believe it or not, these shoes work better than any of that stuff. I wear them daily. I buy lots of them, for home, for church, and I'm getting my first pair of J&M boots today, for winters in Indiana... Brrrr
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 18, 2025

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