Crower 87077S-1 Features:

Single billet chromoly valve spring retainer for Nissan Patrol 4.8L TB48, part number 87077S-1. Fits 8 mm valve stems and is precision machined from premium billet bar stock for exact valvetrain fit. Heat-treated chromoly steel helps resist shoulder shearing under higher spring pressures and high-rpm use. Retainer weight is 22.8 g with dimensions A 1.055 in., B 0.750 in., C 0.450 in., step height 0.075 in. plus 0.050.

Chromoly Retainers Nissan Patrol 4.8L TB48 8 Mm Valve Features:

• Billet chromoly steel construction for Nissan Patrol 4.8L TB48 valvetrain durability under high-rpm, high-spring-pressure operation
• Precision-machined 8 mm valve stem fit with 1.055 in. A, 0.750 in. B, 0.450 in. C dimensions and 0.075 in. step height
• Heat-treated design helps resist shoulder shearing and supports long-term valvetrain stability in demanding performance use
• 22.8 g single retainer weight helps maintain accurate valve control and consistent cam timing at elevated RPM ranges
• Direct-fit performance upgrade for TB48 inline 6-cylinder builds; 24 pieces required per engine, single retainer sold individually