ZRP I-shaped forged connecting rods for Volvo S40, V40, B4204T, B4194 – set of 4

The ZRP forged I-shaped connecting rods for the Volvo S40 and V40 with B4204T and B4194 engines are designed for performance upgrades requiring greater resistance to repeated mechanical stress. Their construction from high-strength 4340 steel combines a rigid profile with reinforced connecting rod caps.

Part number R-VOL-005-I-4 includes 4 connecting rods with a center-to-center distance of 139.50 mm, designed for 23 mm gudgeon pins. The AMPCO 18 connecting rod small end bearings feature a radial groove that serves as an oil reservoir. The kit comes with 3/8" ARP2000 fasteners, ARP mounting lubricant, and instructions.

Technical Specifications

• Brand: ZRP
• Manufacturer Part Number: R-VOL-005-I-4
• Applications: Volvo S40 and V40
• Engine codes: B4204T and B4194
• Valveconfiguration of applicable engines: 16-valve
• Range: Standard Series
• Profile: I-beam
• Material: 4340 forged steel
• Center-to-center distance: 139.50 mm
• Gudgeon pin diameter: 23.00 mm
• Connecting rod bush diameter: 53.00 mm
• Connecting rod top end width: 25.65 mm
• Connecting rod small end rings: AMPCO 18
• Fasteners: 3/8" ARP2000
• Rated tensile resistance of fasteners: 220,000 psi
• Rated weight per connecting rod: 531 g
• Weight matching: ± 1 g
• Packaging: set of 4 connecting rods

Design and Manufacturing

• Separately forged body and cap: two-piece construction.
• I-beam profile: geometry designed for rigidity.
• Double-ribbed connecting rodcaps with humps: trussing of the connecting rod top end.
• Centering sockets: precise repositioning of the cap during reassembly.
• Grooves on the bearing flanks: weight reduction in the affected areas.
• Multi-stage heat treatments: resistance, dimensional stability, and fatigue resistance.
• Shotpeening: improved fatigue resistance.
• Magnetic particle inspection: detection of defects in forged parts.
• CNC machining: specified precision up to 0.0002", or approximately 0.005 mm.
• Center distance tolerance: less than 0.001", or 0.0254 mm.
• Bending and torsion testing: verification of geometry.
• Finite element analysis: computer-aided stress analysis.

Mounting on B4204T and B4194 engines

Before assembly, verify that the pistons, gudgeon pins, bearings, and crankshaft pins match the sizes of the connecting rods. Check operating clearances and follow the oiling and tightening instructions for the supplied ARP2000 fasteners.

Key Features

• 4340 forged steel and I-beam profile.
• AMPCO 18 bearings with oil reservoir.
• 3/8" ARP2000 fasteners included.
• Set of 4 connecting rods matched in weight to within ± 1 g.