BAM ROLLER LIFTERS .904" CHRYSLER BB/HEMI/ O/C NO PUSHROD OILING BRONZE BUSHING B-2031-16BB4

BAM Roller Lifters was formed in 2009 with the aim of providing the highest quality lifters direct to the engine builder. All BAM Roller Lifters are 100% made in the USA, each set of lifters are hand assembled with the highest level of care and accuracy. Triple Alloy Steel Billet Lifter Bodies machined on state of the art CNC equipment.

• Key Features:
  • .904" Diameter – Purpose-Built for BBM Top Alcohol Engines
  • Designed specifically for Big Block Mopar (BBM) platforms in Top Alcohol drag racing.
  • Ensures tight lifter-to-bore fitment, providing reliable camshaft tracking at extreme RPM.
  • Built to withstand the rigors of high-horsepower, high-spring-pressure race engines.
  • Configuration - O/C
  • On Center, body design improves pushrod alignment with wide rocker spacing and raised port cylinder heads.
  • Reduces pushrod angle stress and side loading, enhancing valvetrain efficiency and durability.
  • Supports accurate valve motion under aggressive cam profiles.
  • No Pushrod Oiling – Designed for External Lubrication Systems
  • Specifically built without internal oiling passages, ideal for dry sump or block-fed oiling systems.
  • Reduces internal complexity and eliminates failure points associated with internal pushrod oiling.
  • Preferred setup in professional Top Alcohol engines where external lubrication is precisely controlled.
  • Bronze Bushing – High-Load Needle-Free Durability
  • Features a solid bronze bushing for exceptional oil retention and wear resistance.
  • Eliminates needle bearings—ideal for high-RPM racing where durability and reliability are critical.
  • Delivers smooth, consistent lifter operation, even under extreme heat and load conditions.
  • Trusted by engine builders for long-term performance and reduced lifter/cam wear.
  • 0.300" Tall Lifter Body – Increased Bore Engagement for Stability
  • Extended body design increases contact within the lifter bore, reducing lifter walk and flex.
  • Enhances stability at high RPM and under extreme spring pressures, ensuring consistent cam contact.
  • Supports valvetrain rigidity and longevity.
  • CNC-Machined from Premium Billet Steel – Built for the Strip
  • Machined from heat-treated billet steel for exceptional strength and wear resistance.
  • Precision CNC tolerances ensure perfect lifter function and repeatable performance.
  • Engineered to thrive in high-load, high-stress drag racing environments.
  • Top Alcohol Race Proven – Professional Grade Component
  • Developed for Top Alcohol drag racing, where lifter reliability is mission-critical.
  • Proven in engines producing massive horsepower and sustaining extreme RPMs.
  • Built for consistency, power delivery, and zero-compromise performance.

  Applications:

  • Designed for Big Block Mopar (BBM) Top Alcohol engines using offset lifter configurations.
  • Intended for builds not using pushrod oiling, and compatible with external or block-based lubrication systems.
  • Ideal for use with aggressive camshafts, shaft rocker systems, and high-spring-pressure setups.
  • Trusted in NHRA Top Alcohol, Pro Mod, and other professional drag racing environments.

  Race with confidence using BAM .904" Roller Lifters — featuring bronze bushings, no pushrod oiling, and offset durability tailored for Top Alcohol BBM powerplants!