FLEECE FPE-CUMM-CP3K-6.7 6.7L CUMMINS CP3K

Eliminate high-RPM fueling drop-off on your 6.7L Cummins with the FLEECE FPE-CUMM-CP3K-6.7—a brand-new, modified CP3 engineered to remove the factory flow restriction that starts around 3,000 RPM. Maintain commanded rail pressure through the entire rev range for stronger towing, cleaner shifts, and reliable top-end power. Fleece CP3K 6.7 Cummins, maintain rail pressure, 3000 RPM fuel restriction fix, high performance CP3 upgrade, CPP Diesel exclusive diesel performance parts

Why CP3K instead of stock?

• Removes the factory CP3 flow restriction that causes rail pressure loss after ~3,000 RPM
• Holds commanded pressure for consistent power and drivability
• Brand-new pump (no core), OE-quality reliability from Fleece
• Great choice for single-pump builds and as the primary in dual-pump setups

Fitment

Engine: 6.7L Cummins common-rail
Vehicles: 2007.5–2018 Ram 2500/3500/4500/5500 equipped with CP3-based fuel system
Purpose: Restore/maintain high-RPM fuel flow and rail pressure; ideal for towing, street, and performance use

Cross-Reference / Related Fleece Items (CPP Diesel)

• FLEECE FPE-CUMM-CP3K-5.9 — 5.9L Cummins CP3K
• FLEECE FPE-DMAX-CP3K — Duramax CP3K
• FLEECE POWERFLO 1000 (12mm) — 6.7L Cummins
• FLEECE FPE-CP3-FEED — 1/2" CP3 Feed Fitting

It’s a strong choice for trucks in the ~500–650 RWHP range with proper supporting mods. For bigger builds, step up to PowerFlo 1000 or add a second pump.

No special tuning is required for basic operation, but calibration can optimize fueling and drivability for your combo.

Brand-new CP3 (no core) modified by Fleece for high-RPM flow retention.

No—this unit is for 6.7L Cummins. For GM CP4 conversions see Fleece CP3 conversion kits on our site.

California Proposition 65 warning applies; see table below.

Specifications for FLEECE FPE-CUMM-CP3K-6.7