BPS Cummins X15 Cylinder Head SOHC Stage 3

Elevate your Cummins diesel engine's capabilities with the BPS X15 SOHC Stage 3 Cylinder Head for 2011-present models.

A brand new, fully loaded component engineered for high-performance and heavy-duty applications. Featuring Inconel valves on both intake and exhaust sides, this cylinder head is built to withstand extreme conditions while exceeding OE specifications, offering a ready-to-install solution without the need for cores, perfect for trucks, fleets, and industrial setups demanding superior durability.

Key Features and Specifications

• Advanced CGI450 Material Construction:   33% greater creep resistance (reduced creep rate) and 15% higher tensile strength vs. standard gray iron for superior high-temperature durability under heavy loads. BPS proprietary compacted graphite iron casting.
• Optimized Coolant Flow: Prevents overheating during long hauls and heavy-duty cycles.
• Thickened Combustion Surfaces & Larger Valve Seats: Dramatically reduces cracking risks for longer service life.
• Inconel Valves: Corrosion-resistant superalloy for reliable performance in extreme conditions.
• Fully Assembled: Includes valves, springs, and cam bearings for quick, hassle-free installation.
• No Core Needed: Buy outright and skip the hassle of returns.
• Stage 3 Upgrade Defined: High-strength casting + Inconel intake AND exhaust valves for extreme heat resistance + optimized coolant flow and reinforced fire deck. Fully assembled, bolt-on ready. No core return required. Designed to handle heavy-hauling or high-horsepower applications. Exceeds OE durability specs.
  

OEM Part Number Cross Reference • Cylinder Head (Loaded SOHC): 4298234 • Alternative OE Reference: 3686434 • Other Cross References: 4298237, 4356434, 3686660 • ISX15 Variant (2011-2018): 5658294RX