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2.0L 16v - XU10J4RS
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2.0L 16v - XU10J4RS
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Set of 4 forged 4340 steel connecting rods for Citroën / Peugeot 2.0L 16V XU10J4RS (20 mm pin).
The XU10J4RS is the high-performance 2.0-litre 16-valve unit from the PSA group, derived from the XU family. Naturally aspirated, with a displacement of 1,998 cc and an 86 mm bore and stroke, it powers the sportiest versions of the marque and delivers up to 167 hp thanks to its lively, high-revving 16-valve cylinder head.
It is found under the bonnet of the Peugeot 306 S16, Citroën ZX 16V and Xsara VTS produced between 1996 and 2005. Highly sought after for tuning, it provides a solid basis for competition, where reinforcing the rotating assembly quickly becomes essential to withstand high engine speeds and increased power.
Machined from high-strength 4340 steel, these forged connecting rods secure the bottom end as soon as power increases. They become essential when fitting forged pistons, raising the rev limit, increasing boost pressure or gaining displacement, all cases where the factory rod reaches its limits.
Designed to absorb the heavy loads of tuned engines (highly tuned naturally aspirated as well as forced-induction), they cover every discipline (rallying, drift, drag, circuit, hillclimb, time attack) and support Stage 2, Stage 3 and Stage 4+ builds, up to the full competition engine.
| Reference | Brand | Profile | Bolts | Pin diameter OEM 20 mm | Small-end width | Big-end diameter OEM 53.7 mm | Big-end width | Center-to-center OEM 158 mm | Weight per rod |
|---|---|---|---|---|---|---|---|---|---|
| R-CIT-002-I | ZRP | I | ARP 2000-3/8"-38mm | 20 mm | 53.7 mm | 24.2 mm | 158 mm | 610 g | |
| R-CIT-002-I-L19 | ZRP | I | ARP L19-3/8"-38mm | 20 mm | 53.7 mm | 24.2 mm | 158 mm | 610 g |
| Rod | Bolts | Torque | Recommended stretch |
|---|---|---|---|
| ZRP (R-CIT-002-I) | ARP 2000 | 61 N·m | 0.140 – 0.152 mm |
| ZRP (R-CIT-002-I-L19) | ARP L19 | 67.8 N·m | 0.152 – 0.165 mm |
Manufacturers recommend the stretch-gauge method as the reference; the instructions supplied with the kit always take precedence. The torque figures correspond to assembly with ARP lubricant.
| 4340 steel is a nickel-chromium-molybdenum alloy steel used in both aerospace and motorsport. Forged then heat-treated (quenched and tempered), it combines high tensile strength, excellent fatigue life and real ductility. Compared with a factory rod (often made of sintered metal, optimised for mass-production cost), a 4340 forged rod gains roughly +19% yield strength, +8% tensile strength and above all +19 to +37% fatigue strength, i.e. a service life under cyclic loading several times longer. This is exactly what makes forged 4340 the reference material as soon as engine speed and load rise. |
 | I-Beam I profile (reinforced I). The I-beam rod, with its thinner central section, is lighter: less inertia and freer revving, an asset on a lively, high-revving engine like the XU10J4RS. Forged from 4340 steel, its reinforced structure handles higher loads without a weight penalty. |
The rod bolt is one of the most heavily stressed parts of the engine. The key is to match the ARP grade to the real use of the build, then to strictly follow the specified assembly torque and stretch.
 | ARP 2000 (tensile strength around 220,000 psi, i.e. ~1,517 MPa) is the high-performance standard. It covers builds up to 150 hp per cylinder in 5/16" or 200 hp per cylinder in 3/8", and up to 8,500 rpm. It is the most common grade in circuit, trackday, drift, rally, drag and hillclimb, valued for its strength, reliability and versatility, with no particular storage constraints. |
 | ARP L19 (tensile strength around 260,000 psi, i.e. ~1,793 MPa) targets engines pushed to the extreme: up to 200 hp per cylinder in 5/16" or 250 hp per cylinder in 3/8", and up to 10,000 rpm, under very high boost pressure, sustained high revs and high cylinder pressure. It is the choice for big-power builds: drag, drift, rally and circuit. Sensitive to corrosion and hydrogen embrittlement, it must be stored and fitted oiled, away from moisture. |
| Beyond torque tightening, measuring rod-bolt stretch remains the most reliable check for achieving correct preload. The measurement is taken with the bolt fitted: place the dial gauge (stretch gauge) on both ends of the bolt and read its actual stretch, which must match the recommended value (see the torque & stretch table above). This method removes the friction variations inherent to torque tightening and secures the assembly on heavily stressed engines. |
 | ZRP is a Greek brand of high-performance forged connecting rods, designed by Alex Drakos in Athens. Each rod is forged from 4340 steel, precision-machined and balanced to ±1 g to stay reliable at high rpm. On this XU10J4RS application they are offered in an I (reinforced I-beam) profile with ARP 2000 or L19 hardware, designed and inspected in Greece, and proven in rallying, on circuit and in drift. |
 | 1) Small end 2) Small-end diameter 3) Rod beam 4) Rod bolt 5) Big end 6) Rod nut / bolt 7) Rod cap 8) Big-end diameter 9) Center-to-center |
These forged connecting rods are compatible with all vehicles fitted with the 2.0 16V XU10J4RS engine. The table below lists the Citroën and Peugeot models concerned.
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Citroën | Xsara VTS | XU10J4RS | 167 hp | 1998–2005 |
| Citroën | ZX 16V | XU10J4RS | 163 hp | 1996–1997 |
| Peugeot | 306 S16 | XU10J4RS | 163 hp | 1996–2001 |
OEM reference: 0603 60 (set of 4 rods).
When a factory bottom end fails (broken, bent or scored rod), going back to the OEM configuration means replacing rods and pistons, often damaged together. The bill climbs quickly, for a mere return to standard with no gain.
For a comparable, sometimes lower budget, fitting 4340 forged connecting rods together with forged pistons brings far greater reliability and a wider safety margin, plus real power-upgrade potential. It is the route chosen by European engine builders for over fifteen years.
For the same outlay: more reliability, more potential, more longevity.
