Crower 66247-16 Features:

Crower 66247-16 severe-duty solid roller lifters for Chrysler 440 Mopar Performance cast iron or Mega Block applications Set of 16 race-ready lifters with intake offset, 0.9031 in. OD, 0.812 in. roller wheel diameter, and 130 g weight per lifter Integral 1-piece body is CNC-machined from special alloy steel and heat-treated for maximum durability and wear resistance Oversized large-diameter bearings with thicker walls help handle extreme valvetrain loads in full-race, high-RPM engine builds

Severe Duty Rollers Chrys .903 In. Od Intake-offset Chrysler Features:

• One-piece heat-treated alloy body, CNC-machined for full-race durability, superior wear resistance, and dependable valvetrain control under extreme racing stress
• Oversized larger-diameter bearings with thick-wall construction help withstand high-rpm loads, reducing fatigue in severe-duty Chrysler race valvetrain setups
• Chrysler 440 Mopar Performance cast-iron and Mega Block application with dedicated intake offset for correct lifter positioning and precise valvetrain geometry
• 0.9031 in. OD body and 0.812 in. roller wheel deliver exact severe-duty dimensions for demanding race-engine builds requiring consistent operation
• 130 g lightweight profile, sold as a 16-piece set, supports reliable high-performance valvetrain function; oil restrictors not recommended with roller lifters