Cummins B6.7 engine

Cummins B6.7 engine

Product Overview

For sale is a new, complete Cummins B6.7 engine — also known as the QSB6.7 and ISB6.7— in Tier 5 (Final Tier 4 / EU Stage V) emissions specification, at zero hours and ready for direct installation. The engine is supplied complete and has never been installed or operated.

The Cummins B6.7 is the world’s most widely deployed inline-six diesel engine in the 175–400 hp power range, trusted across the construction, agricultural, industrial, marine, and generator sectors globally. A new Tier 5 unit provides the most current emissions compliance alongside the full operational life of a factory-new engine. Please contact us for the specific power rating, serial number, and full specification of this unit.

Engine Specification

B6.7 / QSB6.7 / ISB6.7 – Same Engine, Different Names

Cummins markets the same 6.7-litre inline-six under multiple designations depending on the application and era:

• B6.7 — the current commercial and OEM designation, used for the Tier 4 Final and Tier 5 / Stage V generation
• QSB6.7 — the QSB designation (Quantum System B) used extensively in construction and industrial equipment applications
• ISB6.7 — the ISB (Interact System B) designation used in earlier applications and some on-highway variants

All three names refer to the same fundamental 6.7-litre Cummins B-series inline-six engine architecture. Buyers searching under any of these designations will find this engine is the relevant product for their application. Please confirm your equipment’s specific power rating and Tier compliance requirement when enquiring.

Typical Applications

About the Cummins B6.7 Tier 5 Engine

The Cummins B6.7 is the current-generation flagship of Cummins’ B-series engine family — one of the most commercially successful and widely deployed diesel engine architectures in history, with millions of units in service across every inhabited continent. In Tier 5 / Final Tier 4 / EU Stage V specification, the B6.7 incorporates Cummins’ full suite of advanced aftertreatment technology: EGR (Exhaust Gas Recirculation), DOC (Diesel Oxidation Catalyst), DPF (Diesel Particulate Filter), and SCR (Selective Catalytic Reduction) — delivering the lowest emissions output available in the B-series while maintaining the power density and fuel efficiency that has made the platform the benchmark in its class.

The B6.7 Tier 5 platform is available in power ratings from approximately 175 hp to 400 hpdepending on the specific equipment application and calibration. This wide power range reflects the engine’s versatility across the construction, agricultural, and industrial sectors — the same fundamental architecture, calibrated to the specific demands of each OEM application.

A new B6.7 Tier 5 represents a genuinely rare find in the secondary market. Most available B6.7 engines are used units removed from equipment at various service stages. A new-hours, Tier 5 compliant unit provides the full remaining engine life and the most current aftertreatment specification — important for operators working in regulated markets where emissions compliance is enforced.

Ideal For

• Construction equipment operatorsrequiring a new B6.7 / QSB6.7 replacement for excavators, wheeled loaders, motor graders, or compactors
• Agricultural machinery operatorsrequiring a new B6.7 replacement for tractors, combines, or sprayers
• Generator set operators requiring a new Tier 5 B6.7 for standby or prime power applications
• Industrial and crane operators requiring a new engine with Tier 5 compliance for regulated site use
• Cummins distributors and dealerssourcing new stock for customer supply
• Equipment rebuild specialists requiring a new engine core for a complete machine overhaul

Purchasing & Enquiries

This new Cummins B6.7 / QSB6.7 / ISB6.7 Tier 5 engine is available for immediate sale. It is at zero hours and complete. Full specification details including power rating, serial number, and aftertreatment configuration are available on request.