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2.2 16v - F22C
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2.2 16v - F22C
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Set of 4 forged 4340 steel connecting rods for the Honda F22C 2.2 16V VTEC.
The Honda F22C (full code F22C1) is the naturally aspirated 2.2 four-cylinder fitted to the second-generation Honda S2000 (AP2), built from 2003 to 2009. Derived from the F20C, it keeps the same DOHC 16-valve, twin-cam architecture and VTEC valvetrain, but gains displacement: the bore stays at 87 mm while the stroke grows from 84 to 90.7 mm, raising capacity to 2,157 cc. That extra stroke favours low- and mid-range torque and makes the car more flexible day to day, without losing the top-end character the S2000 is famous for. In this form the F22C produces 239 to 243 hp depending on market and still revs happily beyond 8,000 rpm. Aluminium block, steel crankshaft and integrated liners: it is a robust base for tuning, provided the rotating assembly is strengthened as power rises.
Machined from high-strength 4340 steel, these ZRP forged rods replace the F22C factory rods as soon as tuning exceeds stock territory. Where the OEM rod reaches its limits under turbo compression or aggressive naturally aspirated builds, closed-die forging delivers far superior fatigue and bending resistance. They suit every sporting use of the S2000: circuit and track days, drift, hillclimb, time attack, as well as turbo or supercharger conversions. Depending on the chosen bolts, they support Stage 1 to Stage 3 builds without reservation and secure the rotating assembly well beyond the original power level, while preserving factory balance thanks to tightly controlled dimensions.
| Reference | Brand | Profile | Bolts | Pin diameter OEM 23 mm | Small-end width | Big-end diameter OEM 51 mm | Big-end width | Center-to-center OEM 149,65 mm | Weight |
|---|---|---|---|---|---|---|---|---|---|
| R-HON-015HL | ZRP | H-Lite | ARP 2000-3/8"-38mm | 23 mm | 51 mm | 23,85 mm | 149,65 mm | 456 g | |
| R-HON-015HL-L19 | ZRP | H-Lite | ARP L19-3/8"-38mm | 23 mm | 51 mm | 23,85 mm | 149,65 mm | 456 g |
OEM reference: 13050-PZX-A00 (set of 4 rods).
| Rod | Bolts | Tightening torque | Recommended stretch |
|---|---|---|---|
| ZRP (R-HON-015HL) | ARP 2000 (3/8") | 61 N·m | 0,140–0,152 mm |
| ZRP (R-HON-015HL-L19) | ARP L19 (3/8") | 67,8 N·m | 0,152–0,165 mm |
| 4340 is a low-alloy nickel-chromium-molybdenum steel prized for its outstanding balance of strength and toughness. Once forged and heat-treated, it reaches a tensile strength of around 1,000 to 1,200 MPa, far above the sintered (powder-metal) steels used in OEM rods, which top out near 600 to 700 MPa and cope poorly with the alternating loads of a performance build. Forging aligns the metal grain flow with the stress paths: the part resists fatigue, high rpm and occasional detonation better. It is the reference material for a reliable reinforced rotating assembly. |
 | H-Lite profile: a lightened version of the H-beam, tailored to high-revving naturally aspirated engines like the F22C. The H section offers excellent bending stiffness for a controlled weight, reducing reciprocating mass and helping the engine rev. It is the ideal profile for a circuit- or time-attack-focused S2000, where light weight and high-rpm strength matter most. |
 | ARP 2000: the reference bolt for the vast majority of builds. Made from an alloy heat-treated to about 220,000 psi (1,517 MPa) tensile strength, the 3/8" ARP 2000 bolt easily handles close to 200 hp per cylinder and rpm up to 8,500. It covers most tuned S2000s, from aggressive naturally aspirated to modest turbo, with an unbeatable reliability-to-price ratio. |
 | ARP L19: a step up for extreme builds. This high-performance alloy reaches about 260,000 psi (1,793 MPa) and allows up to roughly 250 hp per cylinder, for big turbos and engines pushed to very high rpm. The L19 bolt is more sensitive to corrosion and demands careful assembly and dry storage: reserve it for setups that truly need it. |
| On premium ARP bolts, torque tightening can be replaced or checked by measuring bolt stretch, a far more accurate method because it directly monitors the real tension in the bolt, independent of friction. The stretch gauge sits between the two ends of the bolt; you tighten until the recommended stretch is reached (see the table above). This is the method ARP recommends for a competition assembly. |
 | ZRP: forged rods designed by Alex Drakos (Athens), known for forging quality, finish and an excellent performance-to-price ratio. The ZRP range covers the main tuning engines with controlled dimensions and rigorous quality control, in H and I profiles depending on use. For the F22C, the H-Lite profile chosen here favours light weight and high-rpm strength. |
 | 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 rods are designed for the Honda F22C (F22C1) engine fitted to the second-generation Honda S2000. Always check your vehicle's exact engine code before ordering.
| Make | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Honda | S2000 (AP2) | F22C1 | 239–243 ch | 2003–2009 |
When an engine throws a stock rod at high rpm or under heavy load, the damage often spreads to the block, crankshaft and cylinder head: the bill far exceeds the price of a set of forged rods. Fitting reinforced rods from the start of a build means investing once to secure the rotating assembly for good and drive with peace of mind, on track as on the open road. Unlike a stock rod pushed beyond its range, the 4340 forged rod keeps a comfortable safety margin and extends the life of the moving assembly. Over time, it is the most rational and cost-effective choice for a tuned F22C.
