Pair New Ford/Mazda 4.0 OHV Cylinder Heads for Ranger, B4000, Explorer (1990-1995) W/ Head Gasket Set & Bolts, Water Pump & Timing Set

Enhance your vehicle’s performance with our premium pair of cast iron Ford/Mazda cylinder head, designed for Ford Ranger, Explorer, Bronco, Ford Aerostar, and Mazda B4000 4.0 OHV engines (1990-1995). These fully assembled cylinder heads come complete with head gasket & bolts, timing kits and a water pump, providing a comprehensive solution for your engine rebuild or upgrade.

Key Features:

• Wide Compatibility – Fits Ford Ranger, Explorer, Bronco, Ford Aerostar, and Mazda B4000 4.0 OHV engines (1990-1995).
• Heavy-Duty Construction – Built from durable cast iron for maximum strength and longevity.
• Fully Assembled Cylinder Heads – Includes brand-new valves, springs, and seals for hassle-free installation.
• Complete Solution: Includes fully assembled cylinder heads, head gasket set & bolts, timing kits, and a water pump for a seamless upgrade.
• Core Return Required

Fitment Data:

AEROSTAR 90-94 6-245 (4.0L)

EXPLORER 91-94

MAZDA B-4000 94

MAZDA NAVAJO 91-94

RANGER 90-94 6-245 (4.0L, OHV)

Important Note: Rocker arm torque specification is 30 ft-lbs.

Product Details:

• Weight: 70 pounds for the pair.
• Sold as a Pair: This listing includes two fully assembled cylinder heads.

Heavy Duty Parts Company Quality Assurance:

At Heavy Duty Parts Company, we prioritize the highest quality standards for our products. Each cylinder head undergoes:

• Comprehensive Cleaning and Inspection: Ensuring top-notch condition before shipment.
• Pressure Testing: To guarantee there are no leaks.
• Perfect Sealing: High-quality valve seals are installed, followed by a vacuum test on each valve.

Warranty Information:

Heavy Duty Parts Company offers a two-year unlimited mileage warranty on all our cylinder heads.

Why Choose Heavy Duty Parts Company?

With years of industry expertise, Heavy Duty Parts Company is your trusted source for high-quality cylinder heads and engine components. Our extensive online catalog and knowledgeable team ensure you find the perfect parts for your vehicle.

Contact Us:

• Email: sales@heavydutypartscompany.com
• Hours: Monday – Friday, 8 AM to 5 PM EST

Signs You May Need a New Cylinder Head:

• Weak Engine Performance: Experiencing lower gas mileage, sluggish acceleration, or difficulty climbing hills?
• Oil Leaks: Noticing puddles of oil under your vehicle after it’s been parked?
• Coolant Leaks: Seeing coolant puddles or getting overheating warnings on your dashboard?
• Engine Misfires: Having frequent engine failures or trouble starting?
• White Smoke: This could indicate severe cylinder head failure and requires immediate attention.

Invest in quality and performance with Heavy Duty Parts Company. Ensure your engine runs smoothly and efficiently with our expertly crafted cylinder heads.

Heavy Duty Parts Company – Core Returns Policy

Effective December 17, 2025

At Heavy Duty Parts Company, core returns are essential to our ability to provide high-quality, cost-effective cylinder heads. Returned cores supply critical components—such as keepers, springs, and retainers—that are vital to proper engine performance and allow us to maintain OEM-level quality.

No Upfront Core Charge

Unlike many suppliers, we do not charge a core fee upfront. Instead, we rely on customers to return their used cores within the required timeframe.

Core Return Requirements

• Cores are due within 30 days of the purchase date

• If a core is not returned within 60 days, the product warranty is void

• Unreturned cores will be charged as follows:

  • Cylinder heads under $600: $200 per unreturned core

  • Cylinder heads $600 and above: $400 per unreturned core

Customers needing additional time may contact us to request an extension. Approved extensions will prevent core charges from being applied.

Core Return Process

Cylinder heads are shipped with prepaid core return labels included in packets attached to the outside of each box. If labels are missing, customers should contact us for replacements prior to returning the core.

Core Eligibility

Some cylinder heads do not require a core return. In certain cases, core requirements may be waived at our discretion.

Why Core Returns Matter

• Reused core components help maintain OEM-quality standards

• Core returns allow us to keep pricing competitive

• Recycling cores supports sustainability by reducing waste and conserving resources

This policy applies to all purchases made on or after December 17, 2025.

Send Back All Components

To ensure the quality and integrity of our remanufacturing process, we ask that you return all components that were originally included with your new cylinder head. This includes items such as:

• Rocker arms
• Camshafts (if applicable)
• Any other hardware that came with your purchase

Easy & Free Core Return Process

• Each purchase includes a prepaid core return label in a plastic sleeve on the box.
• Simply pack your core with all included components, attach the label, and drop it off with the carrier—no extra cost to you.
• Returned cores undergo inspection and recycling, ensuring maximum efficiency.

Customer Partnership & Sustainability

By returning your core and its components, you help maintain a reliable supply chain, ensuring we can continue offering top-quality products at the best prices. This process not only benefits your wallet but also contributes to a greener and more efficient automotive industry.

We appreciate your support in keeping our business and the industry running smoothly!

Ford