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S&S Diesel

LML CP3 conversion kit w/pump - Competition Use Only - No Tuning Req d

$2,175.00

SKU: S09R LML-CP3-NO-TUNING-REQ

In Stock
In Stock
Ships by Jun 7
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Non-Returnable Item
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The S&S Diesel Motorsport LML CP3 Conversion Kit replaces the problematic CP4.2 high-pressure fuel pump in 2011-2016 LML Duramax engines with a more durable and reliable CP3 pump. CP4.2 pumps are known for high failure rates that can contaminate the entire fuel system. This kit includes all necessary hardware for the conversion, requires no tuning changes, and in some versions (like the 50-state CARB-compliant one) maintains factory emissions control equipment.

Fitment

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Specifications

BrandS&S Diesel
Part NumberS09R LML-CP3-NO-TUNING-REQ

Videos

LML Duramax CP4 Fix, S&S 50 State Legal CP3 Conversion Kit Install

LML Duramax CP4 Fix, S&S 50 State Legal CP3 Conversion Kit Install
S&S Diesel Motorsport LML CP3 Conversion Kits Explained

S&S Diesel Motorsport LML CP3 Conversion Kits Explained
LML CP3 Conversion Kit (S&S Diesel Motorsport) - Duramax 2011-2016

LML CP3 Conversion Kit (S&S Diesel Motorsport) - Duramax 2011-2016

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

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