4pcs 4HF1 Engine Pistons and Pins set compatible with NPR, NQR, NRR, NPR-HD, NKR trucks and forklift models.Designed for use with the 4HF1 engine and matching the 6570 specification, this set includes four pistons and corresponding pins constructed from cast iron for in heavy-duty applications.The components are engineered to deliver performance and extended service life in operating conditions.Suitable for use in excavators, forklift trucks, and other industrial machinery, these pistons and pins provide a direct fit replacement, facilitating straightforward installation.The design supports efficient in -load environments, making them a practical choice for maintenance and repair of compatible engines.This is a non-OEM replacement part.Any trademarks or model numbers cited are used strictly to demonstrate compatibility.