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4.8L 24v - TB48DE
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4.8L 24v - TB48DE
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Set of 6 forged 4340 steel connecting rods for the Nissan Patrol Y61 4.8 TB48DE.
The TB48DE is a 4,759 cc inline-six developed by Nissan for the Patrol Y61 (GR and GU series). With dual overhead camshafts and 24 valves, this naturally aspirated, cast-iron-block engine delivers around 245 hp (180 kW) at 4,800 rpm and 420 Nm at 3,600 rpm. Built from 2001 to 2016, it powered the Patrol across the Middle East, Africa and Oceania, where its toughness and low-end torque built its reputation. Its over-engineered design made it a favourite tuning base: once forced induction is added, the TB48DE easily exceeds twice its factory output, loading the rotating assembly far beyond stock tolerances.
| Reference | Brand | Profile | Hardware | Pin diameter OEM 23 mm | Small-end width | Big-end diameter OEM 60 mm | Big-end width | Center-to-center OEM 163,45 mm | Weight |
|---|---|---|---|---|---|---|---|---|---|
| 14000-6 | Manley | H | ARP 2000-3/8"-41mm | 23 mm | 60 mm | 32,77 mm | 163,45 mm | 820 g | |
| 14429-6 | Manley | I-HD | ARP 2000-3/8"-41mm | 23 mm | 60 mm | 32,77 mm | 163,45 mm | 800 g |
| Rod | Hardware | Torque | Recommended stretch |
|---|---|---|---|
| Manley (14000-6) | ARP 2000-3/8"-41mm | 88,1 N·m | 0,147 - 0,157 mm |
| Manley (14429-6) | ARP 2000-3/8"-41mm | 81,3 N·m | 0,147 - 0,157 mm |
Indicative figures, bolts lubricated with ARP assembly lube. Measuring bolt stretch with a dial gauge remains the most reliable way to ensure even preload.
NSB Concept forged connecting rods replace the TB48DE original rods to withstand the loads of a built engine. Forged from solid then machined, they offer far greater fatigue and bending strength than stock rods, which becomes essential as power, rpm or boost pressure rise. They suit every motorsport use: rally, drift, drag, circuit, hillclimb and time attack, as well as Stage 2, Stage 3 and Stage 4 and beyond builds. Combined with forged pistons, they secure turbo or supercharged setups where instant torque and high-rpm operation push the rotating assembly hard. Two profiles are offered: the H-Beam, built for torque and boost, and Manley's I-HD (Pro Series I-Beam Turbo Tuff), which blends light weight with high-rpm strength.
Every rod is forged from 4340 chrome-molybdenum steel, the benchmark for high-load builds. Compared with a stock sintered rod, quench-and-tempered 4340 shows roughly 19% higher yield strength, about 8% higher tensile strength and 19 to 37% greater fatigue endurance. This aerospace-grade alloy holds its geometry under repeated cyclic loads, where a stock rod would eventually creep and fail.
Two profiles are available depending on your project:
 | H-Beam profile: an H-section that favours bending and compression stiffness. It is the reference choice for high-torque, heavily boosted engines, where the rod must take high loads without deforming. |
 | I-HD profile (Pro Series I-Beam Turbo Tuff): Manley's reinforced I-Beam version. Lighter than an H-Beam while remaining very strong, it reduces rotating-assembly inertia and favours high-rpm operation, an ideal balance of performance and reliability. |
  | Each rod ships with its ARP 2000 hardware, made in the USA. This alloy offers a tensile strength of around 220,000 psi (~1,517 MPa), well above stock bolts. In 5/16" diameter it suits up to about 150 hp per cylinder; in 3/8", the diameter used here, it handles up to about 200 hp per cylinder and engine speeds up to 8,500 rpm. Tough, reliable and versatile, ARP 2000 can be reused provided the stretch procedure is followed and has no particular storage constraints, making it a standard for rally, circuit, drift, drag and hillclimb. |
 | Manley Performance is an American manufacturer of competition engine parts and a member of the Wiseco group. Its rods are forged, machined, then inspected and matched by set, with tightly controlled weight variation between rods. Renowned for their consistency and endurance, Manley rods are found in rally and circuit engines as well as the most demanding drag and drift builds. |
| Rod-bolt preload is controlled by length, not torque alone. Using a stretch gauge, the bolt is measured relaxed then tightened: the difference must match the recommended stretch (here 0,147 to 0,157 mm). This method ensures even preload across all rods, removes the uncertainty caused by thread friction and is the reference for a reliable high-performance build. |
| Make | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Nissan | Patrol (Y61) | TB48DE | 245 hp (180 kW) | 2001-2016 |
OEM reference: not sold separately by the manufacturer (set of 6 rods).
Investing in forged rods protects the whole engine. The price of a rod set is nothing compared with engine failure, which often takes the piston, crankshaft and block with it. On a built TB48DE the stock rotating assembly becomes the weak link: making it reliable with 4340 forged rods and ARP 2000 hardware extends engine life and lets you chase performance with confidence.
