2011-2016 Duramax Dual Fuel Pump Kit w/ Pump (436408)

The Industrial Injection Dual Fuel Pump Kit (436408) bolts a second CP3 alongside the factory pump on a 2011-2016 6.6L Duramax LML, with the secondary pump included. Splitting fuel delivery across two pumps keeps rail pressure steady under heavy fueling, drops EGTs, and roughly halves the drive load on the OE pump. Built for trucks running large injectors and high-level tune programs that demand the volume a single pump can't sustain.

• Includes the secondary CP3 — complete dual-pump kit
• Adds a second CP3 alongside the factory pump for high-volume fuel delivery
• Maintains constant rail pressure under heavy fueling
• Helps reduce EGTs
• Cuts drive load on the factory pump by approximately 50%
• Designed for large injectors and high-level tune programs

• Choose 436407 for the kit without the CP3 pump (bring your own pump).
• Will not fit trucks with dual alternators — the CP3 mounts where the second alternator lives.
• May not clear the EGR cooler — removal may be required for fitment.
• Custom tuning is required to run a dual-pump setup. Running this kit without matching tuning can damage the engine.
• An aftermarket lift pump is required.