Product successfully added to your shopping cart
Quantity
Total
There are 0 items in your cart. There is 1 item in your cart.
Total products
Total shipping To be determined
Total
2.0L 16v - 4B11T
Manufacturers
2.0L 16v - 4B11T
Warning: Last items in stock!
New product
Set of 4 forged EN24T steel connecting rods for the Mitsubishi 2.0 16V Turbo 4B11T.
The 4B11 is a 2.0-litre (1,998 cc) inline-four with twin overhead camshafts, 16 valves and MIVEC variable valve timing. Part of the ‘4B1’ family developed by Mitsubishi within the Global Engine Alliance, it has an 86 mm bore and an 86 mm stroke, a strictly square architecture. Introduced in 2007, it brought to the Lancer Evolution an aluminium cylinder block (shedding around 12 kg versus the 4G63T it replaced) and chain-driven rather than belt-driven timing.
Its turbocharged derivative, the 4B11T, powers the Lancer Evolution X (CZ4A) as well as the Lancer Ralliart (CY4A sedan and CX4A Sportback), with factory output ranging from 237 hp on the Ralliart to over 300 hp on the most potent Evo X versions. As soon as boost pressure, engine speed or load climb beyond factory values, the stock rods – sized for road use – become the weak link of the reciprocating assembly. Replacing them with forged rods is the decisive step to reliably secure a 4B11T build.
Our forged 4B11T rods are machined from wrought EN24T steel, the reference alloy in motorsport, and offered in the I-HD profile (a reinforced ‘Heavy Duty’ I-beam) specifically designed to withstand the high cylinder pressures of a turbo engine. They suit every discipline – circuit, drift, rally, drag, time attack and hillclimb – and support both a track-driven Evo X and a Ralliart with raised power. Depending on the target (Stage 2, Stage 3 high power, Stage 4 and beyond), they lock in the power increase without ever cutting corners on reliability. Supplied as a weight-matched set of 4, they keep the factory 23 mm piston pin and 143.71 mm center-to-center length.
Compared with a factory rod designed above all for high-volume manufacturing cost, a forged EN24T rod offers a clearly greater mechanical reserve: around +19% yield strength, +8% tensile strength and +19 to +37% fatigue endurance. That margin lets a boosted 4B11T absorb cylinder-pressure peaks and inertia loads without breakage. Two bolt grades are available to cover the whole tuning range, from sensible reinforcement to the most ambitious builds.
| Reference | Brand | Profile | Rod bolts | Ø pin (mm) OEM 23 mm | Small-end width (mm) | Ø big end (mm) | Big-end width (mm) | Center-to-center (mm) OEM 143.7 mm | Weight (g) per rod |
|---|---|---|---|---|---|---|---|---|---|
| R-MIT-EN24-006 | ZRP | I-HD | ARP 2000-3/8"-38mm | 23 | 54.99 | 21.87 | 143.71 | 483 | |
| R-MIT-EN24-006-L19 | ZRP | I-HD | ARP L19-3/8"-38mm | 23 | 54.99 | 21.87 | 143.71 | 483 |
Manufacturers recommend the stretch method (stretch gauge) as the reference: the instructions supplied with the kit always take precedence. The quoted torques correspond to assembly with ARP lubricant.
| Rod | Rod bolts | Tightening torque | Recommended stretch |
|---|---|---|---|
| ZRP (R-MIT-EN24-006) | ARP 2000 | 61 N·m | 0.140–0.152 mm |
| ZRP (R-MIT-EN24-006-L19) | ARP L19 | 67.8 N·m | 0.152–0.165 mm |
| EN24T is a low-alloy steel with nickel, chromium and molybdenum, supplied quenched and tempered. Forging aligns the metal fibres in the direction of load, closes internal porosity and delivers far greater mechanical strength than a factory cast or sintered rod, together with high fatigue endurance, essential as soon as the engine gains torque, power or revs. This is the material used across our entire 4B11 range. |
 | The I-HD profile (ZRP) is a reinforced ‘Heavy Duty’ I-beam: it concentrates material where the compression loads build up while thickening the rod beam to carry the load of a turbo engine. Machined from EN24T steel and weighing 483 g per rod, it offers the best compromise between a light reciprocating assembly and robustness, ideal for a 4B11T running significantly raised boost. |
 | ARP 2000: the all-round benchmark alloy, with a tensile strength of about 220,000 psi (1,517 MPa). It is the default choice in our kit: it covers the vast majority of 4B11T builds, from reinforcing a mildly tuned Evo X to Stage 2 and Stage 3 configurations. |
 | ARP L19: a very high-strength steel (about 260,000 psi, 1,793 MPa) intended for the most heavily stressed engines. It allows a higher preload and more margin against high cylinder pressures; being corrosion-sensitive, it requires careful storage and assembly. It is the recommended option for Stage 4 builds and beyond. |
| On a forged rod, the exact bolt preload is checked by its stretch, measured with a dial gauge (stretch gauge), rather than by torque alone: lubrication and run-in distort the torque reading. Always refer to the stretch values given by the bolt manufacturer. |
 | ZRP is a Greek manufacturer founded by Alex Drakos in Athens, known for its forged rods machined to tight tolerances and weight-matched. For the 4B11T, the range comes in the I-HD profile, with a choice between ARP 2000 and ARP L19 bolts depending on the intended build level. |
 | 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 fit the Mitsubishi models powered by the 2.0 L 16v turbo 4B11T inline-four, with a 23 mm pin and 143.71 mm center-to-center:
| Brand | Model (chassis) | Engine code | Power | Years |
|---|---|---|---|---|
| Mitsubishi | Lancer Evolution X (CZ4A) | 4B11T | 280–360 hp | 2007–2016 |
| Mitsubishi | Lancer Ralliart (CY4A) | 4B11T | 237 hp | 2009–2015 |
| Mitsubishi | Lancer Sportback Ralliart (CX4A) | 4B11T | 237 hp | 2010–2011 |
OEM reference:
On a 4B11T with raised power, a stock rod that lets go usually takes the block, crankshaft and pistons with it. Investing in a forged rod set from the outset costs far less than an engine failure followed by a full rebuild. You permanently strengthen the bottom end, preserve the value of your build and drive with peace of mind, in intensive use as much as day to day.
