Industrial Injection 436403 CP4 to CP3 Conversion Kit (Tuning Required) 11-16 6.6L GM Duramax LML

With the release of the LML Duramax in 2011, GM made the switch from the reputable CP3 injection pump to the lower output CP4 pump, simply because they deemed it was Is good enough for you and your truck? We've seen numerous failures of the CP4 on stock trucks, let alone even slightly modified trucks that chew them up and spit them out. Industrial Injection has this complete conversion kit that delivers everything you need to swap out your failure prone CP4 to a dependable CP3, including the CP3!

IMPORTANT NOTE

• This kit will ONLY work with trucks with custom ECM tuning. See Related Products section for alternatives.

Proven Reliability

• The CP3 fuel pump is proven to have longevity and to be reliable in performance applications.

Remove the Worries

• The CP4 has known failure issues that cannot be remedied. These issues, if they occur, can cause damage to other major fuel system components.

Tuning Required

• This kit requires custom tuning in order to properly function