3977225 Cummins Bare Cylinder Head For ISB QSB Engines

Product Overview:

The 3977225 is 24-valve cylinder head engineered exclusively for Cummins 6.7L ISDe, ISB and QSB common rail diesel engines. Adopting high-strength cast iron integrated casting, it features optimized port design, integrated water and oil passages, and precise factory machining, excellent heat dissipation and anti-deformation performance under heavy-duty and high-temperature working conditions.  it perfectly matches commercial trucks, engineering machinery and generator sets, providing durable and reliable top-end engine performance for long-cycle harsh operation scenarios.

Key Features:

✅Integrated cast high-pressure oil galleries without external tubing to reduce oil leak risks

✅Optimized streamlined air passages boost intake efficiency, cutting fuel consumption and black smoke emission

✅Compatible with National III / IV electronic common rail engines for stable emission compliance

✅Stress-relief aging treatment prevents casting deformation & warpage under long-term high-temperature operation

Application:

✅ Commercial Vehicles:Dongfeng 6.7L trucks, buses & light-duty trucks; 2007–2010 Dodge Ram 2500/3500 6.7L pickups

✅ Construction Machinery:Komatsu, Liugong, XCMG 6.7L loaders, excavators and road rollers

✅Stationary Power Units:6.7L diesel generator sets & oilfield power equipment

3977225 Cylinder Head Specification:

Why Choose US?

✅Reliable HT250 cast iron, Original standard & full leakage testing

✅ Factory direct supply, low bulk FOB cost

✅ 12-month warranty for non-man-made failures

✅ Global sea/air/land shipping, bundled kits available