PORSCHE 99610400403 Right Cylinder Head 306-5949 3.4 4/6

( Manufacturer Part Number: 99610400403 ), ( Ipn: 306-5949 ), ( Storage Location: X3c04 ), ( Note: Cylinder 4-6 ), ( Engine: 3.4 ), ( Oe/oem Part Number: 996-104-004-03; 996.104.004.03; 996 104 004 03 ), ( Placement On Vehicle: Right Passenger ), ( Country Of Origin: Germany ), ( Type: Cylinder Head ), ( Brand Type: Genuine Oem ), ( Fitment Notes: Specializedgerman 2025 )

Review PORSCHE 3.4 Right Cylinder 4-6 Head Oem Used fits 911 1999–2001

The **Porsche 996 911 (996.104.004.03) from the 1999 2001 model years** represents a refined yet understated evolution of the iconic 911, blending cutting-edge engineering with the timeless elegance of its predecessors. This particular variant, distinguished by its **3.4-liter flat-six engine (designated as the 996.104.004.03)**, embodies Porsche s commitment to performance, precision, and quiet luxury a departure from the sportier, more aggressive 996 3.6-liter models that followed. The engine, a naturally aspirated M96, produces a smooth and linear **258 horsepower** (depending on market specifications) delivered through a six-speed manual transmission (or optional Tiptronic automatic in later years), offering a balance of torque and efficiency that makes it equally capable on winding backroads and daily commutes. The **right-hand cylinder head** (4-6 head) is a subtle but meaningful detail, indicating the engine s alignment and a nod to Porsche s traditional cylinder numbering convention, where the driver s side is designated as "4" and the passenger s side as "6." This configuration, paired with the **double-wishbone suspension** and **multi-link rear axle**, ensures exceptional handling, with precise steering and a neutral ride that adapts seamlessly to both spirited driving and relaxed cruising.

The **996 3.4 s** exterior design is a study in understated sophistication, with a **sleek, aerodynamic silhouette** defined by its **pop-up headlights** (a signature 911 feature), **smooth, flowing fenders**, and **low-profile bodywork** that minimizes drag while maintaining a classic 911 stance. The **blacked-out grille** (common in later 996 models) and **optional carbon-fiber accents** (available on higher trim levels) add a touch of modernity without compromising the car s timeless appeal. Inside, the cabin exudes **premium craftsmanship**, with **full-grain leather upholstery**, **aluminum trim**, and **wood or carbon-fiber inlays** (depending on the trim level), creating an atmosphere of quiet luxury. The **three-spoke sport steering wheel**, **ambient lighting**, and **optional heated seats** further enhance the driver s experience, while the **digital instrument cluster** (with optional analog gauges in later models) provides clear, intuitive feedback without overwhelming the driver. The **sound system**, often upgraded by enthusiasts, can be tailored to suit musical preferences, though stock models typically feature a **Bose or Blaupunkt stereo** with ample power for an engaging audio experience.

Under the hood, the **3.4-liter M96 engine** is a masterclass in balance, offering **strong low-end torque** and a **broad powerband** that rewards patient throttle application. The **dry-sump lubrication system** ensures reliable performance even in extreme conditions, while the **intercooled air intake** (on later models) enhances breathing efficiency. The **six-speed manual transmission**, with its **close-ratio gears**, allows for engaging shifts, though the optional **Tiptronic automatic** (introduced in 2000) provides a more relaxed driving experience with seamless gear changes. The **rear-wheel-drive layout**, reinforced by Porsche s **PDK-inspired (though not yet implemented) drivetrain philosophy**, ensures that power is delivered with precision, making this 911 a joy to drive in both a straight line and on technical roads. The **brake system**, featuring **ventilated discs all around** and optional **carbon-ceramic brakes** (on higher trims), provides exceptional stopping power, while the **electronic stability control (ESC)** introduced in 2001 adds an extra layer of safety without detracting from the car s raw driving dynamics.

The **996 3.4 911** is not just a car; it s a **bridge between tradition and innovation**, offering a **refined yet engaging** driving experience that appeals to both purists and modern enthusiasts. Its **subtle yet distinctive styling**, **smooth yet powerful engine**, and **luxurious yet functional interior** make it a versatile choice for those seeking a **daily driver with 911 pedigree**. Whether cruising along a coastal highway, navigating a twisty mountain pass, or simply enjoying the quiet elegance of a well-appointed cabin, this model embodies Porsche s ability to **evolve without losing its soul**. For collectors and drivers alike, the **996 3.4** stands as a **cult favorite**, a **forgotten gem** in the 911 lineage that deserves recognition for its **timeless appeal, engineering excellence, and understated charm**.

### **Pros and Cons of Buying a Porsche 996 (1999-2001) 911 (3.4L, 4-6 Head, Right-Hand Drive)**

#### **Pros**

1. **Classic 911 Design and Legacy**

The 996 is the first modern 911 after Porsche s shift to a more angular, aerodynamic design. While not as iconic as the 993, it retains the core 911 character with a sleek, aggressive stance. For enthusiasts who appreciate the evolution of the 911, this generation bridges the gap between the retro 993 and the more refined 997.

2. **Improved Handling and Chassis**

Compared to the 993, the 996 features a more rigid chassis, better suspension tuning, and improved weight distribution. The 4-6 head engine (M96) is a significant upgrade over the older 993 s M62/M64, offering better power delivery and reliability. The car handles well for a 911, though not as sharply as later models.

3. **Engine Options and Performance**

The 3.4L flat-six (M96) is a solid choice, producing around **325 hp** (depending on tuning) and **300 lb-ft of torque**. It s more refined than the older 3.6L engines and has a smoother powerband. With minor upgrades (e.g., exhaust, ECU tuning), it can be pushed further. The 996 also introduced the **PDK transmission** (optional in later years), though early models were manual-only.

4. **Reliability Improvements Over the 993**

The 996 is generally more reliable than the 993, thanks to modern materials, better cooling, and fewer known major issues. The 4-6 head engine is robust if maintained properly, though it s not as bulletproof as later 997 engines.

5. **Affordability Compared to Later Models**

A well-maintained 996 is significantly cheaper than a 997 or 991, making it an attractive entry point into 911 ownership. Restoration costs are lower, and parts are still widely available.

6. **Modding Potential**

The 996 is a favorite among tuners due to its strong engine and aftermarket support. Common mods include **exhaust upgrades, ECU tuning, suspension swaps (e.g., Bilstein, Ohlins), and wheel/spoiler packages**. The car responds well to power increases, making it a great platform for enthusiasts.

7. **Daily Driving Practicality**

While not as comfortable as a modern car, the 996 is more refined than the 993 in terms of ride quality and interior fit-and-finish. The later models (2000 ) have improved sound insulation and slightly better ergonomics.

---

#### **Cons**

1. **Aging Design and Practicality Issues**

The 996 s design is polarizing some love its futuristic look, while others find it too angular and less elegant than the 993. The interior is functional but dated, with hard plastics and a less premium feel compared to later 911s. Luggage space is tight, and the rear seats are impractical.

2. **Common Reliability Concerns**

- **Oil consumption** (especially in the 3.4L M96 engine, though less severe than the 3.6L in the 993).

- **Water pump failures** (common in early models, often requiring replacement).

- **Timing chain stretch** (can lead to valve float at high RPMs; some owners report this in later years).

- **Electrical gremlins** (infotainment system, sensors, and wiring issues in older examples).

- **Rust** (especially in the subframe, wheel wells, and rear quarter panels critical to inspect).

3. **Poor Sound Insulation and Wind Noise**

The 996 is notorious for **loud wind noise** at highway speeds, and the cabin lacks proper sound deadening. This makes long-distance driving less enjoyable compared to later models.

4. **Limited Aftermarket Support (Compared to 997/991)**

While there is an aftermarket for the 996, it s not as extensive as for the 997 or 991. Some high-end mods (e.g., carbon fiber parts, advanced suspension systems) are harder to find or more expensive.

5. **Fuel Economy and Running Costs**

The 3.4L engine is thirsty, averaging **12-15 MPG** in real-world driving. Maintenance costs (oil changes, timing chain service, water pump) add up over time, especially if the car hasn t been well-maintained.

6. **Resale Value and Depreciation**

The 996 holds value better than the 993 but not as well as the 997 or 991. If you plan to sell later, a 997 or 991 will likely fetch a higher price for similar performance.

7. **Driving Experience Limitations**

While the 996 handles well, it lacks the **precision and balance** of later 911s. The steering is heavier, and the car feels less agile in tight corners. The **PDK transmission** (if available) is a major upgrade, but early models were manual-only.

---

### **Conclusion and Recommendation**

#### **Who Should Buy a 1999-2001 Porsche 911 (996, 3.4L, 4-6 Head)?**

- **Enthusiasts who appreciate the 911 s evolution** and don t mind a less classic look.

- **Those looking for a project or mod-friendly car** with strong engine potential.

- **Buyers on a budget** who want a 911 without the premium price of a 997 or 991.

- **Drivers who prioritize performance and handling** over daily comfort and luxury.

#### **Who Should Avoid It?**

- **Those seeking a refined, high-end driving experience** (consider a 997 or 991 instead).

- **People who dislike wind noise and poor sound insulation.**

- **Buyers who want a low-maintenance, daily driver** (a modern sports car or even a 993 might be better).

- **Those who value resale value highly** (the 996 depreciates faster than later 911s).

#### **Final Recommendation**

If you find a **well-documented, low-mileage example** (under **50,000 miles**) with **proper maintenance records** (oil changes, timing chain service, water pump replacement), the 996 can be a fantastic buy. Focus on:

- **Engine condition** (check for oil leaks, carbon buildup, and timing chain stretch).

- **Rust inspection** (especially subframe, wheel wells, and rear quarter panels).

- **Electrical system** (test all sensors, infotainment, and lighting).

- **Suspension and steering** (ensure no excessive play or worn bushings).

**Best for:** Enthusiasts who want a **fun, mod-friendly 911** without the high cost of newer models. **Avoid if:** You prioritize **luxury, reliability, or resale value** over raw driving enjoyment.

- If you like the 996 but want better reliability, look for a **2002-2004 996 (M96.1 engine)** these are slightly refined.

- If you prefer a classic look with better handling, a **993 (especially a 3.6L or Turbo)** may be worth the extra cost.

- If you want a modern 911 experience, a **used 997 (2005-2012) or 991 (2012-2019)** is a better long-term investment.

Details:

Make: Porsche. They require specific tools or information to program. 1999 2001 Porsche 911 996 3.4 Right Cylinder 4-6 Head OEM Used: Brand. BMW Parts Porsche Audi Volkswagen Other Makes.

We really do have it all. In addition, all applicable coolers, lines and filters must be flushed clean before installation to prevent contamination premature failure. Manufacturer Part Number. Radio / Stereo.

From engines to emblems. Doing the right thing for your vehicle, wallet, and environment. Condition: Used. All new fluids, gaskets, filters and seals must be used upon installation of all parts.

Most or all European electronic devices Stereo, ECU, Modules, etc. Need to be programmed. Item Specifics. Chassis: 996. Putting you back on the road is only half story.

Electrical parts are not returnable if installed. Storage Location: X3C04. And with over ten thousand vehicles dismantled for parts, that goal is a reality. Country/Region of Manufacture: Germany.

All maintenance procedures must be properly followed at intervals least as frequent recommended by the vehicle manufacturer. These items are not Plug and Play. Please save all packaging materials and damaged goods before filing a claim. Giving you access to virtually every part on car.

These items need to be coded the vehicle they are being installed into. Most radios require a security code or password to unlock the unit for use.

part #: 99610400403 price

• $1349.23

specifications cylinderheapar:

• for models: 911
• for makes: Porsche
• for years: 1999-2001
• mpn: 99610400403
• ipn: 306-5949
• storage location: X3c04
• note: Cylinder 4-6
• engine: 3.4
• oe/oem part number: 996-104-004-03; 996.104.004.03; 996 104 004 03
• placement on vehicle: Right Passenger
• country of origin: Germany
• type: Cylinder Head
• brand type: Genuine Oem
• fitment notes: Specializedgerman 2025

offer cylinderheapar:

• availability: In Stock
• best offers: True
• sold: 0
• started: February 9, 2026
• quantity: 1
• options: Ship-to-home

general cylinderheapar:

• Car Truck Parts Accessories > Engines Engine Parts > Cylinder Heads
• condition: Used

payments cylinderheapar:

• credit card: Mastercard
• cash
• other
• check
• money order
• wallet: Google-pay

shipping cylinderheapar:

• carrier: USPS, UPS
• transit: 3-10 Days
• service: USPS Ground Advantage, UPS Ground
• cost: $0.00
• type: Fixed
• class: Standard

returns cylinderheapar:

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

seller cylinderheapar:

• rating: 99.9%
• city: Rancho Cordova, California
• # reviews: 74855

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