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2.3L 16v - B235
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2.3L 16v - B235
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Set of 4 forged 4340 steel connecting rods for SAAB 2.3L 16V Turbo B235.
The Saab B235 is a 2.3-litre 16-valve turbocharged inline-four from Saab's H-engine family. Introduced in 1997 in the Saab 9-5 (YS3E), it powered the Swedish saloon and estate until 2009, and later the first-generation Saab 9-3 (YS3D) in its sporting versions.
The range shares one architecture across several power levels: the B235E with around 185 hp (low-pressure Garrett turbo), the 220 hp B235L and the 230 to 260 hp B235R Aero (Mitsubishi TD04 turbo). With a cast-iron block and a twin-cam aluminium head, the B235 responds very well to tuning: higher boost and a remap quickly raise cylinder pressure, which loads the rotating assembly directly.
Machined from high-strength 4340 steel, reinforced forged connecting rods strengthen the bottom end as soon as power rises. They become essential when switching to forged pistons, raising the rev limit, increasing boost pressure or gaining displacement, all cases where the original rod reaches its limits.
Designed to withstand the high stresses of tuned engines (turbocharged and supercharged alike), these forged connecting rods cover every discipline (rally, drift, drag, circuit and track days, hillclimb, time attack) and support Stage 2, Stage 3 and Stage 4+ builds, up to full competition engines.
| Reference | Brand | Profile | Bolts | Pin diameter OEM 24 mm | Small-end width | Big-end diameter OEM 56 mm | Big-end width | Center-to-center OEM 153 mm | Weight per rod |
|---|---|---|---|---|---|---|---|---|---|
| KCR052A | Wössner | I | ARP 2000-3/8"-38mm | 24 mm | 22 mm | 56 mm | 26.4 mm | 153 mm | 690.74 g |
| Rod | Bolts | Torque | Recommended stretch |
|---|---|---|---|
| Wössner (KCR052A) | ARP 2000 | 74.6 N·m | 0.1397 – 0.1524 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 aerospace and motorsport alike. Forged then heat-treated (quench and temper), it offers excellent tensile strength, high fatigue resistance and real ductility. Compared with an original rod (often sintered/powder metal, optimised for series-production cost), a 4340 forged rod shows roughly +19% higher yield strength, +8% higher tensile strength and above all +19% to +37% higher fatigue strength, i.e. a fatigue life under cyclic loading several times longer. This is what makes forged 4340 the reference material as soon as boost and rpm climb. |
 | I-beam profile. With its thinner central section, the I-beam rod is lighter: less inertia and freer rev pick-up. It is the preferred profile on modern turbo engines. Its I-HD (Heavy Duty) version is a reinforced variant, designed for higher loads. |
The rod bolt is one of the most heavily stressed parts in the engine. The key is to match the ARP grade to the real use of the build, then to strictly follow the assembly torque and stretch.
 | ARP 2000 (tensile strength ~220,000 psi, i.e. ~1,517 MPa) is the high-performance standard. Suited to builds up to 150 hp per cylinder with 5/16" bolts or 200 hp per cylinder with 3/8" bolts, and up to 8,500 rpm, it is the most common grade in circuit, track days, drift, rally, drag and hillclimb, recognised for its strength, reliability and versatility, with no particular storage constraints. |
In addition to torque tightening, measuring rod-bolt stretch is the most reliable check for optimal preload. The check is done with the bolt fitted: place the gauge (dial indicator) on the two 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 in torque tightening and secures the assembly on heavily stressed engines. |
 | Wössner. A respected German manufacturer of high-end forged pistons and connecting rods, Wössner machines 4340 steel rods to tight tolerances, balanced and ready to fit. The Saab B235 set is offered in I-beam profile with ARP 2000 hardware. |
 | 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 SAAB B235 engine (3.0L 24V twin-turbo):
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| SAAB | 9-5 (YS3E) | B235E | 185 hp | 1997–2009 |
| SAAB | 9-5 Aero (YS3E) | B235R | 230–260 hp | 1999–2009 |
| SAAB | 9-3 Viggen (YS3D) | B235R | 225–230 hp | 1999–2002 |
| SAAB | 9-3 Aero (YS3D) | B235R | 230 hp | 2002–2003 |
OEM reference: 30589313 (replaces 9199233), set of 4 connecting rods.
When an original bottom end fails (broken, bent or scored rod), going back to the factory configuration means replacing the rods and the pistons, often damaged at the same time. The bill climbs quickly, for a simple restoration to stock.
For an equivalent budget, or even less, fitting 4340 forged connecting rods paired with forged pistons brings far greater reliability and safety margin, plus real potential for power increase. It’s the solution chosen by European engine builders for over 15 years.
For the same budget: more reliability, more potential, more longevity.
