134-8440 Hex Jet Nos AB440

( Brand: Aftermarket ), ( Manufacturer Part Number: 134-8440 ), ( Part Type: Jet )

Review AFTERMARKET #440 Small Hex Main Jet Nos fits 440

The **AB440 Hex Jet NOS (New Old Stock)** from the **134-8440** series is a high-performance, precision-engineered propulsion system designed for demanding marine applications, particularly in the realm of high-speed craft, military vessels, and specialized watercraft. This jet drive represents the pinnacle of modern marine propulsion technology, combining robust construction with advanced aerodynamics to deliver unmatched efficiency, reliability, and thrust output. Built with a **hexagonal impeller design**, the AB440 Hex Jet ensures superior water handling and reduced cavitation, making it ideal for both recreational and commercial use where performance and durability are critical. The **NOS (New Old Stock)** designation indicates that this unit has been carefully preserved in its original condition, free from modifications or wear, ensuring it meets the same exacting standards as a brand-new model while offering the added benefit of proven reliability from a pre-owned but fully functional system.

At its core, the **134-8440 AB440 Hex Jet** features a **440 horsepower-rated** configuration, capable of propelling vessels at impressive speeds while maintaining exceptional fuel efficiency. The **hexagonal impeller** a signature innovation in this series optimizes water flow by reducing turbulence and improving thrust transfer, resulting in smoother operation and extended component life. The drive s **modular design** allows for easy maintenance and servicing, with accessible components such as the **seal assembly, thrust bearing, and impeller shaft**, all of which are engineered to withstand the harshest marine environments. The **closed-loop cooling system** ensures consistent performance by preventing overheating, while the **high-strength alloy construction** provides resistance against corrosion, saltwater erosion, and mechanical stress, making it a durable choice for both freshwater and saltwater applications.

One of the standout features of the **AB440 Hex Jet** is its **adjustable thrust vectoring capability**, which enhances maneuverability and control, particularly in tight spaces or during high-speed operations. This feature is particularly valuable for military and law enforcement vessels, where precision navigation and rapid directional changes are essential. Additionally, the **integrated noise-reduction technology** minimizes operational noise, contributing to a quieter ride and reducing environmental impact a key consideration for eco-conscious operators. The **sealed and lubricated thrust bearing** further enhances reliability by reducing friction and wear, ensuring long-term performance without frequent adjustments.

For those seeking a **high-performance propulsion solution**, the **134-8440 AB440 Hex Jet NOS** delivers a perfect blend of power, efficiency, and durability. Whether integrated into a **high-speed patrol boat, a luxury yacht, or a specialized workboat**, this jet drive excels in demanding conditions while offering the reassurance of a well-maintained, high-quality system. Its **NOS status** guarantees that buyers receive a unit that has been stored and preserved to near-factory specifications, minimizing the risk of hidden wear or damage. With its advanced engineering and proven track record, the **AB440 Hex Jet** remains a top-tier choice for operators who demand nothing less than excellence in marine propulsion.

### **Pros and Cons of Buying a 1984-1986 BMW 844i (M8440 Engine, 440 Hex Jet NOS)**

#### **Overview**

The **1984 1986 BMW 844i** with the **M8440 4.4L inline-6 engine** (often referred to as the "Hex Jet" due to its six-cylinder design) is a classic performance car with a strong following. Below is a detailed breakdown of its advantages and drawbacks, followed by a conclusion and recommendation.

---

### **Pros**

1. **Strong Engine Performance**

- The **M8440** is a high-revving, naturally aspirated inline-six that produces **225 230 hp** (depending on tuning and year) and **246 lb-ft of torque**.

- It revs enthusiastically to **7,000 RPM**, making it fun to drive in its stock form.

- The engine is **durable** if maintained properly, with many examples lasting **200,000 miles** with basic upkeep.

2. **Classic BMW Driving Dynamics**

- The **E23 chassis** (shared with the 635CSi and M1) offers **sharp handling, precise steering, and a well-balanced ride**.

- The **recirculating ball steering** (later models) provides excellent feedback.

- The **four-speed automatic (ZF 4HP22)** is smooth, though the manual (Getrag GS5) is preferred by purists.

3. **Timeless Design & Prestige**

- The **1984 1986 844i** is one of BMW s most elegant coupes, with a **luxurious interior, hand-stitched leather, and high-quality materials**.

- It carries **BMW s reputation for engineering excellence**, making it a desirable collector s item.

- The **hexagonal headlights (1984 1986)** and **aerodynamic bodywork** give it a distinct, premium look.

4. **Modding & Tuning Potential**

- The **M8440 is highly tunable**, with aftermarket support for **intake, exhaust, ECU tuning, and forced induction (turbo/supercharger)**.

- **Stock compression (9.5:1) allows for mild forced induction** without major engine modifications.

- **Performance parts** (e.g., **BMS, Weber, or modern ECU upgrades**) can significantly boost power while maintaining reliability.

5. **Parts Availability & Community Support**

- As a **classic BMW**, parts are widely available, though some **rare or aftermarket components** may require sourcing.

- A **strong aftermarket and restoration community** exists, with forums (e.g., **BMW328.net, E23.org**) offering troubleshooting and build advice.

- **Used NOS (New Old Stock) parts** (e.g., engines, transmissions, suspension) are sometimes available, though prices can be high.

6. **Lower Running Costs (Compared to Modern Supercars)**

- **Fuel economy is decent for its class ( 12 14 MPG combined)**, though not as efficient as modern cars.

- **Basic maintenance (oil changes, timing belt, spark plugs) is affordable** compared to exotic or hypercar-level vehicles.

- **Insurance costs are moderate** (though they can rise if the car is heavily modified).

7. **Investment Potential**

- **Well-preserved examples are appreciating in value**, especially **low-mileage, original-condition cars**.

- **Restored 844is with originality** can sell for **$50,000 $100,000 ** depending on condition and provenance.

- **Project cars** (with potential) can be bought for **$20,000 $40,000**, offering a chance for appreciation if restored properly.

---

### **Cons**

1. **High Maintenance & Reliability Concerns**

- **Timing belt must be replaced every 60,000 70,000 miles** (critical failure can destroy the engine).

- **Water pump and tensioner are often replaced at the same time** (costs **$500 $1,200** depending on labor).

- **Distributor and ignition components** wear out over time and require periodic replacement.

- **Suspension components (ball joints, bushings, shocks) degrade** and may need frequent attention.

- **Automatic transmissions (ZF 4HP22) can be finicky** some require **fluid changes and valve body servicing**.

2. **Common Issues & Weak Points**

- **Oil leaks** (valve cover gasket, rear main seal, oil filter housing gasket).

- **Exhaust manifold cracks** (especially on early models).

- **Power steering pump failures** (common in high-mileage examples).

- **Electrical gremlins** (alternator, sensors, wiring harness issues).

- **Rust** (especially in **floor pans, rocker panels, and undercarriage** common in older cars).

3. **Cost of Restoration & Upkeep**

- **Full restoration can cost $20,000 $50,000 **, depending on condition and scope of work.

- **Originality is highly valued** restoring to **concours-level condition** is expensive.

- **Specialty tools and expertise** are often required for **BMW-specific repairs**.

- **Storage and insurance** add to the ownership cost (especially for high-value examples).

4. **Driving Limitations**

- **Stock power (225 230 hp) is adequate but not dominant** modern performance cars far outpace it.

- **Manual transmission is stiff and requires practice** (not ideal for casual drivers).

- **Automatic transmission can be sluggish** compared to modern automatics.

- **No modern safety features** (no ABS, traction control, or airbags in early models).

5. **Parts & Service Challenges**

- **Some original parts are discontinued**, requiring **aftermarket or NOS replacements**.

- **Finding a qualified BMW specialist** can be difficult in some areas.

- **Labor costs** for BMW work are often **higher than average** due to specialized knowledge.

6. **Depreciation Risk (If Not Maintained Properly)**

- **Neglected or poorly restored examples lose value quickly**.

- **Heavy modifications (e.g., turbocharging without proper support) can reduce resale value**.

- **Market fluctuations** can affect pricing, especially in economic downturns.

7. **Daily Usability Concerns**

- **Not practical for daily commuting** fuel economy, comfort, and modern tech are lacking.

- **Parking and maneuverability** can be challenging due to its size and weight ( 3,200 lbs).

- **No modern infotainment or driver aids** (no Bluetooth, backup camera, etc.).

---

### **Conclusion**

The **1984 1986 BMW 844i (M8440 engine)** is a **fantastic classic car** for enthusiasts who appreciate **BMW s engineering heritage, driving dynamics, and timeless design**. It offers **strong performance, modding potential, and investment value**, making it a **great choice for collectors, restorers, and performance-minded drivers**.

However, it is **not a plug-and-play daily driver** it requires **regular maintenance, mechanical knowledge, and a budget for upkeep**. If you are **willing to invest time and money into preserving or restoring it**, the 844i can be an **extremely rewarding and valuable** ownership experience.

For someone who **prioritizes reliability, modern convenience, and low maintenance**, a **modern performance car (e.g., BMW M235i, Porsche 911, or a well-maintained E46 M3)** might be a better choice. But for **BMW purists, collectors, and those who enjoy hands-on automotive projects**, the **844i remains one of the most desirable classic BMWs**.

---

### **Final Recommendation**

You are **passionate about BMW classics** and enjoy **restoration projects**.

You have **mechanical skills or access to a trusted mechanic** for maintenance.

You are **willing to budget for upkeep** (expect **$1,000 $3,000/year** for a well-maintained example).

You **prioritize driving dynamics and performance** over daily practicality.

You plan to **keep it for the long term** (5 years) and **preserve/restore it properly**.

You want a **low-maintenance, modern daily driver**.

You **lack mechanical knowledge** or cannot afford regular BMW-specific repairs.

You **cannot commit to proper storage** (rust and neglect destroy value).

You **prioritize fuel efficiency, tech, or safety** over classic appeal.

- **Buy a low-mileage, well-documented example

Details:

All parts are in stock and ready to ship. #440 Small Hex Main Jet is new and in excellent condition, not original packaging. Aftermarket 134-8440, AB440 #440 Small Hex Main Jet NOS. Pictures: Thumbnails.

Items are shipped using USPS, UPS, and FedEx. If the original package is included it may show signs of wear.

part #: 1348440 prices

• $14.99-$32.38

specifications azsnowmobiling:

• brand: Aftermarket
• mpn: 134-8440
• part type: Jet

general azsnowmobiling:

• condition: New other see details
• Parts Accessories > Snowmobile Parts > Accessories

offer azsnowmobiling:

• quantity: 4
• best offers: True
• availability: In Stock
• started: May 2, 2026
• sold: 0
• options: Ship-to-home

shipping azsnowmobiling:

• carrier: USPS, UPS
• cost: $0.00
• class: Standard, Expedited, One-day
• type: Calculated
• service: USPS Ground Advantage, USPS Priority Mail Flat Rate Envelope, UPS Next Day Air, UPS 2nd Day Air
• transit: 5-12 Days

payments azsnowmobiling:

• credit card: Mastercard
• other
• wallet: Apple-pay

seller azsnowmobiling:

• city: Ashaway, Rhode Island
• rating: 99.9%
• # reviews: 135653

returns azsnowmobiling:

• paid by: Seller
• policy: Returns Accepted
• time: 30 Days

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