Valve Lifter for Cummins ISB / QSB Series

Technical Overview
The valve lifter for Cummins ISB and QSB Series engines provides precise motion transfer from the camshaft to the valve system, maintaining correct engine timing and smooth operation. Designed for engines built in 2003 and later, this lifter offers long-lasting reliability under OEM-equivalent standards.

Detailed Features
• Base diameter 1.25”, neck length 2”.
• Designed for Cummins ISB4.5, ISB6.7, QSB4.5, QSB6.7 engines.
• Built to OEM-equivalent tolerances for consistent performance.

FAQ

1. What is the function of this part?
A valve lifter (tappet) for Cummins ISB/QSB engines transfers camshaft motion to open and close engine valves precisely, maintaining correct timing and efficiency.

2. Which engines does it fit?
This valve lifter fits Cummins ISB4.5, ISB6.7, QSB4.5, and QSB6.7 engines built in 2003 and later.

3. What material is used?
Each lifter is manufactured from hardened steel for durability and heat resistance under extended engine loads.

4. Is installation complex?
Installation is straightforward for qualified mechanics, following Cummins ISB/QSB engine assembly procedures.

5. Is it OEM or aftermarket?
This is an OEM-quality replacement valve lifter engineered to match original Cummins ISB/QSB performance standards.

Available at Diesel Pro with our trusted warranty and same-day shipping for most orders.