PDI Big Boss Volvo & Mack Cylinder Head | D13 & MP8

All-New PDI CGI Cylinder Head for Volvo D13 and Mack MP8.

Built from Compacted Graphite Iron (CGI) with Inconel intake and exhaust valves for superior heat resistance, strength, and long-term durability in EPA14 and EPA17 engines. Engineered for high cylinder pressures, extended service life, and demanding duty cycles. The Volvo D13 and Mack MP8 operate under extreme thermal and combustion loads. Traditional gray iron cylinder heads are pushed to their limits under modern emissions-era operating conditions.

PDI’s Volvo/Mack Cylinder Head is engineered to exceed those limits.

By combining Compacted Graphite Iron metallurgy with Inconel intake and exhaust valves, this cylinder head delivers improved resistance to cracking, valve failure, and heat-related distortion. It is ideal for heavy-haul, vocational, and performance-focused rebuilds where durability and uptime matter most.

Key Features and Benefits

• Compacted Graphite Iron (CGI) Casting
  Stronger than traditional gray iron with increased fatigue resistance
  Designed to handle higher cylinder pressures without cracking
  Improved thermal stability under sustained exhaust gas temperatures
• Inconel Intake and Exhaust Valves
  Exceptional resistance to heat and corrosion
  Designed for modern emissions-era exhaust temperatures
  Extended valve life in high-load and severe-duty applications
• Precision Machined for Exact Fit
  OEM-spec oil, coolant, and combustion passages
  Designed for drop-in compatibility on Volvo/Mack platforms
• PDI Quality Control Standards
  Multi-stage inspection process
  Flatness, valve seat concentricity, and pressure testing performed prior to release

Applications

• Volvo D13 EPA14
• Volvo D13 EPA17
• Mack MP8 EPA14
• Mack MP8 EPA14