Platinum Racing Products – Nissan RD28, RB25 & RB30 Dry Sump Block Brace (PRP-PREC30D-4WD)

Platinum Racing Products – Nissan RD28, RB25 & RB30 Dry Sump Block Brace (PRP-PREC30D-4WD)

Platinum Racing Products – Nissan RD28, RB25 & RB30 Dry Sump Block Brace (PRP-PREC30D-4WD)

• Platinum Racing Engine Cradle (PREC)

• Material & Construction:

  • Made from high-grade aircraft quality billet aluminum

  • Engineered for both strength and precision fitment

• Core Benefits:

  • Converts 2WD RB/RD blocks to 4WD capability

  • Allows direct fitment of a standard GTR-style sump with minor mods

• Brace Functionality:

  • Overlays and reinforces the OEM main cap cradle

  • Prevents main cap walk and movement

  • Stops polishing of mating surfaces caused by cap shifting

• Structural Integrity:

  • Retains factory one-piece main girdle, enhancing it with the PREC

  • Prevents block damage from bearing cap movement and diff torque stress

• Material Compatibility Insight:

  • Addresses issues with dissimilar metal expansion

  • Cast iron blocks work best with cast iron-style caps

  • Hard billet caps may cause shock rebound and detonation stress into rods

• Power Rating & Recommendations:

  • Ideal for builds up to 1000 WHP

  • For over 1000 WHP, use PRP’s Integrated Main Cap Brace

• Protection from Driveline Stress:

  • Stops block twist and cracking from aftermarket diffs

  • 40mm thick, webbed design disperses energy, preventing breakage

• Included & Optional Parts:

  • Comes with a complete bolt kit

  • ARP 1/2” bolt upgrade kit available (block machining required)
    Note: ARP upgrade needs additional machining to fit

• Why Choose the PREC:

  • Prevents failure under high power and torque loads

  • Adds serious reliability and peace of mind for high-performance RB builds

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