3.0L 12v - RB30 with RB25DET cylinder head
Manufacturers
3.0L 12v - RB30 with RB25DET cylinder head

Set of 12 trimetal connecting rod half-bearings for Nissan RB30, VG30, VG33E and VE30DE.Brand and treatment: ACL Race, untreated or Calico Compatibility: 300ZX, Maxima, Skyline R31, Patrol, Pathfinder Engine codes: RB30E, RB30S, VG30E, VG30ET, VG30DE, VG30DETT, VG33E Available sizes: standard to +0.50 mm, increased clearance version (HX)
Set of 6 forged 4340-steel connecting rods for Nissan RB30 3.0 12v (Skyline R31, Holden VL).Brands: Manley Compatibility: RB30E / RB30ET Engine codes: RB30 Bolts included: ARP 8740 or ARP 2000 (7/16")
RB30/25 forged pistons (RB30 Block + Cylinder head RB25DET) Bores 86-87 mm, Volume ratio 7-7.1:1, Pin 21 mm. Wossner 6-cylinder kits, high-performance Turbo use.
The RB30 with an RB25DET cylinder head is not a factory engine but a well-known build: the tall 3.0L 12-valve block takes the 24-valve RB25 head, gaining stroke without losing breathing.
Two active references here, and we would rather say so than pad the page. The WOSSNER forged pistons cover 86, 86.5 and 87mm bore at 7:1 and 7.1:1 compression ratio, sized for boost. The MANLEY forged connecting rods come as H-Beam and I-Beam Heavy Duty, with ARP2000 or ARP8740 bolts, listed for the RB30 of the Skyline R31.