3942581 3901568 3901569 3925232 4943979 4943978 3935349 3954658 3954657 3971212 4898808 Diesel Engine Connecting Rod For QSB6.7 QSB ISB 6BT5.9 4BT3.9 ISBe ISDe

A connecting rod (also called a con-rod) is a critical link between the piston and the crankshaft. Its primary function is to transmit the massive combustion force from the piston to the crankshaft, converting the reciprocating linear motion of the piston into the rotational motion of the crankshaft to deliver engine power. This Connecting Rod 3942581 3901568 3901569 3925232 4943979 4943978 3935349 3954658 3954657 3971212 4898808 is engineered for maximum durability and precise fitment in QSB6.7 QSB ISB 6BT5.9 4BT3.9 ISBe ISDe engines. Manufactured to meet or exceed OEM standards, it ensures optimal engine performance and a long service life under heavy-duty conditions.

Whether for full engine rebuilds or quick replacements, DDP Engine provides you with the most reliable parts at unbeatable wholesale prices.

Parameter Details
Product Name: Connecting Rod
Part Number: 3942581 3901568 3901569 3925232 4943979 4943978 3935349 3954658 3954657 3971212 4898808

Condition: Brand New / High-Quality OEM / Aftermarket
Warranty: 6 Months / 1 Year
Engine Model: QSB6.7 QSB ISB 6BT5.9 4BT3.9 ISBe ISDe

Application:

4BT: 3.9L inline four-cylinder mechanically turbocharged diesel engine, used in light commercial vehicles (such as mini-trucks and pickups), generator sets, construction machinery (small loaders, forklifts), and special vehicles.

6BT: 5.9L inline six-cylinder mechanically turbocharged diesel engine, used in medium and heavy-duty trucks, buses, marine auxiliary machinery, and stationary power generation/construction machinery.

6CT: 8.3L inline six-cylinder mechanically turbocharged diesel engine (C series), used in heavy-duty trucks, large buses, mining machinery, ships, and heavy construction equipment. It features high torque and reliability, and is commonly found in 1990s–2000s models.

6L: 8.5L inline six-cylinder mechanically turbocharged (L series), specifically designed for heavy construction machinery (excavators, bulldozers), mining trucks, railways, and ships, emphasizing high torque at low speeds and durability under harsh operating conditions.

QSB: 5.9L inline four-cylinder "Q Series" electronically controlled common rail diesel engine (replacing 4BT), used in light and medium-duty trucks, forklifts, excavators, generator sets, and agricultural machinery, meeting China III/IV emission standards and above.

ISBe: 4.5L or 5.9L inline four/six-cylinder electronically controlled common rail engine ("Interact System"), used in light/medium-duty commercial vehicles and some construction machinery, focusing on China III–China V emission compliance and fuel economy.

ISDe: 6.7L inline six-cylinder electronically controlled common rail engine, used in medium and heavy-duty trucks, city buses, and logistics vehicles. It is the larger displacement version of ISBe, covering China III–China V emission standards.

Why Choose DDP Engine:
100% Quality Guaranteed: All parts undergo rigorous testing to ensure perfect compatibility and premium performance.
Fast Worldwide Shipping: Large inventory in stock. Orders are typically processed within 3-7 working days with reliable global express and Transportation.
Professional Technical Support: Unsure about the part number? Contact our engineering team for exact cross-reference matching.
Flexible Solutions: Providing Genuine, OEM, and premium Aftermarket spare parts to fit your budget.