What Is a 13B-REW Crate Engine and Where to Buy One?

If you're searching for a reliable, high-performance rotary powerplant for your Mazda RX-7 FD3S restoration or engine swap project, the 13B-REW crate engine is likely at the top of your list. This twin-turbocharged rotary engine, originally used in the third-generation RX-7 from 1992 to 2002, delivers smooth power delivery, compact size, and legendary tuning potential. Today, both rebuilt OEM units and fully built performance crate engines are available from specialty shops worldwide, with prices ranging from $1,500 for used JDM cores to over $11,000 for turnkey, brand-new assemblies. Understanding the differences between these options—and knowing where to buy a genuine 13B-REW crate engine—is critical to avoiding costly mistakes and ensuring long-term reliability.

What Is a 13B-REW Crate Engine?

The term 'crate engine' refers to a complete, ready-to-install engine sold as a single unit, typically pre-assembled and tested. In the case of the Mazda 13B-REW, this means a twin-turbo rotary engine designed for the FD3S RX-7 platform, delivered in 'as-new' or 'built-to-spec' condition. Unlike used or core engines pulled from donor cars, a crate version is either remanufactured or hand-built by specialists using new or upgraded components.

The original 13B-REW (Rotary Engine, With turbochargers) was Mazda’s first mass-produced twin-turbo rotary, featuring sequential turbocharging: a small primary turbo for low-end response and a larger secondary turbo that engaged at higher RPMs. It produced 255–280 horsepower depending on market and model year, with a redline near 8,500 RPM and a reputation for smoothness and high-revving character.

A modern 13B-REW crate engine may retain OEM specifications or be modified for increased durability, output, or compatibility with modern fuel systems and emissions standards. These engines are commonly sourced from Japan (JDM), rebuilt in North America, or custom-built by rotary specialists for enthusiasts restoring classic RX-7s or performing swaps into other chassis.

Types of 13B-REW Engines Available

When exploring options for a 13B-REW crate engine for sale, it's essential to understand the different categories available, each with distinct advantages and trade-offs:

🔧 Used JDM 13B-REW Engines

These are complete engines imported from Japan, often removed from low-mileage vehicles. They are typically less expensive—ranging from $1,200 to $2,800—but come with inherent risks such as unknown maintenance history, potential wear, or corrosion from storage.

• Pros: Lower upfront cost, genuine OEM parts, factory-original configuration
• Cons: Unknown internal condition, may require rebuild, no warranty unless offered by seller
• Best for: Budget-conscious buyers who plan a full teardown and rebuild anyway

🏭 Remanufactured 13B-REW Crate Engines

These engines start with a used core but are disassembled, inspected, and rebuilt to factory or improved specs using new seals, rotors, apex seals, bearings, and gaskets. Some include upgrades like updated oil pumps or reinforced housings.

• Pros: More reliable than raw used cores, often comes with warranty, consistent quality
• Cons: Higher cost ($4,000–$7,000), still based on potentially aged castings
• Best for: Restorers wanting a dependable, plug-and-play solution without extreme performance goals

✨ Brand-New OEM 13B-REW Style Crate Engines

A rare but valuable option: some suppliers offer crate engines built using brand-new OEM blocks and components sourced directly from Mazda Japan. These are not remanufactured—they are assembled from unused factory parts.

• Pros: Fresh castings, zero prior wear, highest longevity potential
• Cons: Very limited availability, high price ($11,000+)
• Best for: Concours-level restorations or builds where authenticity and reliability are paramount

⚡ Performance-Built 13B Rotary Crate Engines

For tuners and racers, companies offer fully built 13B engines with billet rotors, upgraded housings, port modifications, and high-flow turbos. These may exceed 400+ horsepower and are tailored for track use or high-performance street applications.

• Pros: High power output, enhanced durability, custom tuning options
• Cons: Expensive ($8,000–$15,000+), may require supporting mods (fuel, cooling, ECU)
• Best for: Enthusiasts planning forced induction upgrades or full race builds

Pricing Breakdown: What to Expect

Understanding the 13B-REW crate engine price range helps set realistic expectations and avoid scams or underpriced traps. Below is a general guide based on current market data:

Type	Price Range (USD)	Warranty	Lead Time
Used JDM Core Engine	$1,200 – $2,800	Rarely included	Immediate – 2 weeks
Rebuilt OEM-Style Crate Engine	$4,000 – $7,000	30–90 days	4–8 weeks
New OEM Block Assembly	$11,000 – $13,000	Yes (30-day min)	2–6 weeks
Performance-Built 13B	$8,000 – $15,000+	Varies by builder	6–12 weeks

Shipping costs can add $200–$500 domestically and significantly more for international orders. Always confirm whether the engine includes accessories like intake manifolds, sensors, wiring harnesses, or ECUs—many do not, requiring additional purchases.

Top Suppliers of 13B-REW Crate Engines

Several reputable vendors specialize in rotary engines, particularly the 13B series. Here are some well-regarded sources based on availability, customer feedback, and technical expertise:

📍 SakeBomb Garage

Known for offering brand-new OEM 13B-REW crate engines assembled from unused Mazda Japan components. Their engines include new flywheels, oil pumps, front covers, and squirters—making them among the most authentic and durable options available.

• Website: sakebombgarage.com
• Price: ~$11,500
• Delivery: ~4 days (domestic US)
• Warranty: 30-day return policy

📍 Pettit Racing

A leading name in rotary performance, Pettit offers off-the-shelf (OTS) 13B engines built to their own specifications. They source new OEM blocks and apply proven upgrades for improved longevity and output.

• Website: pettitracing.com
• Price: $11,999
• Delivery: 7 days
• Warranty: 30-day returns

📍 Billet Rotary Store (Australia)

Specializes in high-end billet-built rotary engines, including 13B variants. While focused on performance, they offer streetable configurations suitable for daily-driven RX-7s.

• Website: billetrotary.com.au
• Price: $10,000+
• Delivery: Global shipping available
• Note: Longer lead times due to custom builds

📍 JDM Westcoast & JDM Engine Depot

These suppliers focus on importing low-mileage used JDM engines. While not 'crate engines' in the traditional sense, they offer cleaned, tested units that serve as solid starting points for rebuilds.

• Typical Price: $1,800–$2,800
• Condition: Used, untested internally
• Best Use: Buyers planning a full rebuild

Key Considerations Before Buying

Purchasing a 13B-REW rotary engine isn’t just about finding the lowest price—it’s about matching the right engine type to your project goals. Consider the following factors carefully:

✅ Application: Restoration vs. Performance Build

If you’re restoring an FD3S RX-7 to stock condition, a remanufactured OEM-style crate engine makes the most sense. For a high-horsepower build, investing in a performance-built unit saves time and ensures proper component matching.

✅ Warranty and Return Policy

Always check if the seller offers any warranty or return window. A 30-day return period is common, but some builders offer longer coverage for workmanship defects. Avoid sellers with 'no returns' policies unless you’re experienced and buying 'as-is'.

✅ Core Charges and Deposits

Some remanufacturers require a core deposit (often $1,000–$2,000), refundable when you return your old engine. Factor this into your budget and ensure you understand the terms.

✅ Compatibility and Accessories

Confirm whether the engine includes essential parts like:

• Intake and exhaust manifolds
• Turbochargers and intercoolers
• Sensors, wiring harness, ECU
• Mounting hardware and brackets

Many crate engines ship 'long block' only (block + heads + internals), meaning you’ll need to reuse or purchase peripherals separately.

✅ Fuel Compatibility and Emissions

The 13B-REW was designed for premium unleaded gasoline. Modern ethanol-blended fuels can degrade seals over time. Some builders recommend upgrading to alcohol-tolerant materials if running E85 or mixed fuels. Also, verify local regulations—some states restrict non-certified engine swaps.

Common Misconceptions About 13B-REW Engines

Despite their popularity, several myths persist about rotary engines and crate options:

❌ 'All 13B Engines Are the Same'

False. The 13B-REW (twin-turbo FD3S) differs significantly from the naturally aspirated 13B-RE (FC3S) or the later Renesis (RX-8). Components are not always interchangeable. Ensure you’re buying the correct variant for your application.

❌ 'Crate Engines Are Always Reliable'

Not necessarily. A crate engine is only as good as the builder. Poor assembly, incorrect clearances, or substandard parts can lead to premature failure. Research the vendor’s reputation and ask for build details.

❌ 'You Can Install It and Drive Away'

While some claim 'bolt-in' installation, a full engine swap or replacement requires careful attention to wiring, coolant lines, fuel delivery, and ECU tuning—especially if upgrading beyond stock.

Frequently Asked Questions (FAQ)

❓ Can I buy a brand-new 13B-REW engine from Mazda?

No, Mazda discontinued production of the 13B-REW in 2002. However, some suppliers still have access to unused OEM blocks and components, allowing them to assemble 'new' engines from original parts.

❓ What’s the difference between a 13B-REW and a 13B-T engine?

The 13B-REW uses sequential twin turbos and electronic controls, while the 13B-T (found in some export models) is single-turbo and less complex. The REW is more powerful and refined but also more intricate to maintain.

❓ Do I need a new transmission with a crate engine?

Not necessarily. The 13B-REW pairs with the G200 5-speed manual or Aisin 4-speed automatic. If your existing transmission is in good condition, it can usually be reused.

❓ How long does a rebuilt 13B-REW last?

With proper maintenance, a well-rebuilt 13B-REW can last 80,000–100,000 miles. Key factors include warm-up/cool-down routines, oil quality, and avoidance of prolonged idling.

❓ Are 13B crate engines street legal?

In most cases, replacing an engine with an identical unit (like a 13B-REW in an RX-7) is legal. However, swapping into a non-rotary vehicle may trigger emissions compliance issues depending on your state or country.