Forged connecting rods Nissan 2.0L 16V Turbo SR20DET for forged pistons

The Nissan SR20DET engine (2.0 16V Turbo)

The Nissan SR20DET is a turbocharged 2.0-litre, 16-valve inline-four that became a true icon of the 1990s Japanese performance scene. With a displacement of 1,998 cc (86 mm bore and stroke), a twin-cam cylinder head and electronic fuel injection, it delivers between 205 and 250 hp depending on the version, with an outstanding margin for tuning.

It powers the Nissan Silvia, 180SX and 200SX (S13, S14 and S15), the Pulsar GTI-R and the Bluebird, while its naturally aspirated SR20DE versions equip models such as the Primera, Almera, Sentra and 100NX. A favourite in drifting and motorsport, it offers an exceptionally strong foundation; but as soon as boost pressure and engine speed rise, the factory sintered-steel rods become the first weak link to address.

The forged connecting rods

Forged from high-strength 4340 steel and then heat-treated, these rods are a clear upgrade over the SR20's factory rods. Their forged, porosity-free grain absorbs the alternating loads generated by high rpm and forced induction without deforming, exactly where the original rod reaches its limit from the very first power increases.

Offered in H, I and I-3P profiles and with several bolt grades (ARP 2000, ARP L19 and ARP Custom Age 625+), they suit every level of build: from Stage 1/2 on the factory turbo to competition setups exceeding 400 hp, and are equally at home in drifting, circuit racing, time attack, rally, drag and hillclimb. Each set of 4 rods ships complete with its high-performance bolts.

Technical specifications of the SR20DET forged rods

Tightening torque and stretch

Manufacturers recommend the stretch-gauge method, more accurate than torque alone: it measures the actual elongation of the bolt and ensures even preload across all four rods. The values above are indicative; always follow the instructions supplied with the kit and lubricate the bolts as specified by the manufacturer.

Technical guide

4340 forged steel: what is it?

Connecting rod profiles

	I profile (and I-HD). With its thinner central section, the I-beam rod is lighter and reduces moving mass, helping the engine rev. The reinforced I-HD (Heavy Duty) variant keeps that lightness while handling high power: an excellent all-round compromise, from sporty road builds to track use.
	I-3P profile. Optimised through advanced calculation and machining, this I-beam profile offers increased rigidity for a contained weight. It targets serious builds that want both mechanical strength and responsiveness, on high-boost configurations.
	H profile. Its H-section provides great rigidity and excellent bending resistance under very high loads. Slightly heavier, the H-beam rod is the reference for heavily built engines and high power, where strength takes priority over saving grams.

How to choose your rod bolts?

The rod bolt is one of the most heavily stressed parts of the engine: it holds the rod cap against the inertial forces that grow with rpm. A premium bolt guarantees stable preload and reliable clamping over time. All our SR20 rods come with ARP bolts, available in three grades according to the targeted power level.

	ARP 2000. Tensile strength of around 220,000 psi (~1,517 MPa). It is the tuning standard: generally up to 150 hp per cylinder in 5/16" and 200 hp per cylinder in 3/8". Ideal for the vast majority of SR20DET turbo builds, from Stage 1 to serious setups spinning up to 8,500 rpm.
	ARP L19. Stronger than ARP 2000, it targets engines under very high load and high rpm. Note: L19 steel is sensitive to corrosion and hydrogen; it requires careful lubrication and storage, which reserves it for demanding competition use.
	ARP Custom Age 625+. The top of the ARP range, with extreme strength and fatigue life, without the storage constraint of L19. It is the choice for the most extreme competition engines, when reliability allows no compromise.

Measuring bolt stretch

Buy the ARP stretch gauge →

The brands offered

	ZRP. Greek brand of high-performance forged rods designed by Alex Drakos (Athens). Machined from 4340 steel, they offer a quality/strength ratio highly valued in tuning and motorsport, with an excellent level of finish.
	Boostline. A range developed by Wössner, recognised for its optimised-profile (I-3P) rods of great rigidity. Designed for heavily built turbo engines, they prioritise mechanical strength at high power.
	Manley Performance. A leading American manufacturer in motorsport. Its forged rods (H and I-HD Turbo Tuff profiles) are renowned for their robustness and consistency, on engines stressed at the highest level.

Glossary

Small end: upper part, holds the piston pin. Small-end diameter: bore that receives the piston pin. Rod body: central section (I, I-3P or H profile). Rod bolt: clamps the rod cap. Big end: lower part, articulated on the crankshaft. Big-end diameter: bore that receives the rod bearing. Big-end width: thickness of the big end. Center-to-center: distance between the small-end and big-end centres.

Vehicle compatibility of the Nissan SR20DET engine

These forged rods are compatible with all vehicles fitted with the Nissan SR20 engine (turbo SR20DET and naturally aspirated SR20DE), provided the original dimensions are respected. Check the engine code and the piston pin diameter (22 mm) before ordering.

OEM reference: 12100-8H600 (set of 4 rods).

Why is it the most cost-effective solution?

When a factory bottom end gives out (broken or bent rod, scored bearing), the bill rises quickly. Taking advantage of the open engine to fit forged rods avoids stripping everything down again later and secures the rotating assembly for good.

For a budget equal to, or even lower than, a like-for-like replacement, forged 4340 rods bring a considerable strength margin: the block then handles boost increases and higher rpm without worry, something the factory rods cannot allow.

For a comparable budget: more reliability, more tuning potential and more longevity. It is the assurance of an engine ready for performance, with no nasty surprise at the first power gain.