1989-1998 5.9L Cummins 12V 6BT Big Bowl X-Series Piston Kit - Fly Cut Coated \u0026 Chamfered (.040) - Industrial Injection - 248117

1989-1998 5.9L Cummins 12V 6BT Big Bowl X-Series Piston Kit
Industrial Injection X-Series Piston Kits are built for 1989-1998 5.9L Cummins 12V 6BT (Big Bowl) engine rebuilds, towing applications, and performance diesel builds. Each kit is designed as a drop-in replacement matched piston set and is available in multiple bore sizes to match your engine build.
Choose from Stock Replacement, Coated and Chamfered, or Fly Cut, Coated and Chamfered piston options depending on your engine setup and performance goals.
Stock Piston Kit Features
Fits 1989-1998 5.9L Cummins 12V 6BT (Big Bowl) engines
Drop-in replacement matched piston set
Complete with rings, wrist pins, and clips
Available in Standard, .020", and .040" sizes
Low Friction Anti-Scuff Skirt Coating
Ideal for OEM-style rebuilds, towing applications, and reliable performance upgrades
Coated and Chamfered Piston Kit Features
Fits 1989-1998 5.9L Cummins 12V 6BT (Big Bowl) engines
Drop-in replacement matched piston set
Complete with rings, wrist pins, and clips
Available in Standard, .020", and .040" sizes
Chamfered piston tops to help reduce cylinder wall scuffing
Thermal barrier coating on piston tops
Low Friction Anti-Scuff Skirt Coating .015" reduced compression height
Designed for increased cylinder pressure, elevated boost, heavy towing, and performance diesel builds
Fly Cut, Coated and Chamfered Piston Kit Features
Fits 1989-1998 5.9L Cummins 12V 6BT (Big Bowl) engines
Drop-in replacement matched piston set
Complete with rings, wrist pins, and clips
Available in Standard, .020", and .040" sizes
Chamfered piston tops to help reduce cylinder wall scuffing
Thermal barrier coating on piston tops
Low Friction Anti-Scuff Skirt Coating .015" reduced compression height .100" fly cut valve reliefs for additional piston-to-valve clearance
Ideal for high-performance builds using higher-lift camshafts or requiring added valve clearance
Available Sizes
Standard .020" Oversize .040" Oversize
Choosing the Right Piston Option
Stock Replacement pistons are a strong choice for standard rebuilds, tow rigs, and reliable engine setups. Coated and Chamfered pistons add piston top coating, skirt coating, chamfered piston tops, and reduced compression height for more demanding Cummins builds. Fly Cut, Coated and Chamfered pistons add .100" valve reliefs for builds that require additional piston-to-valve clearance.
Supersedes Previous Part Numbers
PDM-03523 - Stock Replacement (Standard)
PDM-03523.020 - Stock Replacement (.020")
PDM-03523.040 - Stock Replacement (.040")
PDM-03523CC - Coated and Chamfered (Standard)
PDM-03523CC.020 - Coated and Chamfered (.020")
PDM-03523CC.040 - Coated and Chamfered (.040")
PDM-03523FCC - Fly Cut, Coated and Chamfered (Standard)
PDM-03523FCC.020 - Fly Cut, Coated and Chamfered (.020")
PDM-03523FCC.040 - Fly Cut, Coated and Chamfered (.040")
Note: This kit is designed for the Big Bowl piston combustion chamber configuration used in select 1989-1998 5.9L Cummins 12V 6BT engines. Verify your engine's combustion chamber style before ordering.
Product Spec Sheet: Click Here
Important Note
Confirm bore size, compression height, and piston-to-valve clearance requirements before ordering. For performance builds or modified engines, consult your engine builder to verify the correct piston setup.