FLEECE FPE-CLNTBYPS-CUMMINS-VP VP COOLANT BYPASS KIT 1998.5–2002

Keep rear cylinders cool and your VP44 Cummins happy with the FLEECE FPE-CLNTBYPS-CUMMINS-VP Coolant Bypass Kit for 1998.5–2002 Dodge Ram 2500/3500 5.9L. Fleece’s thermostat-controlled bypass smooths pressure spikes and routes consistent coolant flow to the back of the head—exactly where the OE system comes up short—so you can tow harder, drive farther, and protect head gaskets and freeze plugs. Fleece VP44 coolant bypass kit, 2nd Gen Cummins cooling upgrade, rear cylinder temperature control, Dodge Ram 2500 3500 5.9L 1998.5 1999 2000 2001 2002, CPP Diesel

Why it works

• Thermostat-controlled bypass regulates by temperature (not pressure) for stable cooling
• Targets rear-of-head hot spots to reduce temps and pressure spikes
• OE-quality hoses, fittings, and hardware for a clean, leak-free install

Fitment

Engine: 5.9L Cummins (VP44 injection)
Model Years: 1998.5, 1999, 2000, 2001, 2002
Vehicles: Dodge Ram 2500/3500 (manual or automatic transmission)

Cross-Reference / Related Fleece Items (CPP Diesel)

• FLEECE FPE-CLNTBYPS-CUMMINS-12V (1994–1998 12V)
• FLEECE FPE-CLNTBYPS-CUMMINS-VP-SS (VP44 w/ Stainless Line)
• FLEECE FPE-CLNTBYPS-CUMMINS-0305-SS (2003–2005 Auto, SS line)
• FLEECE FPE-CLNTBYPS-CUMMINS-MAN (2003–2007 Manual)
• FLEECE FPE-CLNTBYPS-CUMMINS-MAN-SS (2003–2007 Manual, SS line)
• FLEECE FPE-CLNTBYPS-HS-CRVP-BLK (Replacement Hose, 34.5" Black)
• FLEECE FPE-CLNTBYPS-HS-CRVP-SS (Replacement Hose, 34.5" Stainless)

No. This kit is mechanical and works with your factory calibration.

Yes—stabilizing rear-cylinder temps improves durability while towing, climbing, and long highway pulls.

Thermostat-controlled bypass assembly, hose, fittings, and hardware for a clean, leak-free install (contents may vary by revision).

California Proposition 65 warning applies; see the Specifications table for details.

Specifications for FLEECE FPE-CLNTBYPS-CUMMINS-VP