BMW 13111335300 Injector 170 R100/7 /t

( Manufacturer Part Number: 13111335300 ), ( Part Type: Injector )

Review BMW Original Main Injector 170 R100/7 /t Cs Rts New fits R100 RT RS

The **BMW 13111335300 injector** is a high-performance, precision-engineered fuel injector designed exclusively for the iconic **BMW M134 12-cylinder engine** found in legendary models such as the **R100/7, CS, RTS, and RT**. This part belongs to the **R100/7 (1987 1995) and its high-performance variants**, including the **CS (Competition Sport), RTS (Rally Touring Sport), and RT (Rally Touring)**, which were built for both track dominance and road-going excellence. As a **170-degree, high-pressure, sequential fuel injector**, it plays a critical role in delivering an optimal fuel-air mixture to each cylinder with unmatched precision, ensuring maximum power output, efficiency, and reliability especially under demanding conditions.

Crafted from **high-grade stainless steel and aluminum alloys**, the **13111335300 injector** is built to withstand extreme pressures, temperatures, and mechanical stress, making it a durable solution for both stock and modified applications. The **170-degree spray pattern** ensures even fuel distribution across the combustion chamber, reducing the risk of misfires, carbon buildup, and engine knocking while enhancing throttle response and overall drivability. This injector is compatible with **BMW s electronic fuel injection (EFI) system**, which relies on precise timing and delivery to maintain optimal performance, particularly in high-revving, turbocharged, or supercharged setups.

For enthusiasts restoring or upgrading their **BMW M134-powered motorcycles**, this injector is a **direct replacement part**, ensuring seamless integration with the original wiring harness, mounting brackets, and fuel rail system. It adheres to **OEM specifications**, meaning it will fit perfectly without modifications, making it an ideal choice for both purists and performance seekers. Whether used in a **restomod project, track-day machine, or daily rider**, the **13111335300 injector** delivers the reliability and performance expected from BMW s most legendary engine architecture.

Beyond its technical specifications, this injector is a **key component for maintaining the integrity of the M134 s legendary power delivery**, which was renowned for its **smooth, linear power curve and exceptional high-RPM performance**. Whether paired with **stock or aftermarket fuel pumps, ECU upgrades, or high-flow injectors**, this part ensures that the engine operates at its peak, whether cruising at highway speeds or unleashing its full potential on the racetrack. For collectors, restorers, and performance enthusiasts, the **BMW 13111335300 injector** is not just a replacement part it s a **vital link to the legacy of BMW s most celebrated inline-12 engine**.

### **Pros and Cons of Buying a BMW M13111335300 Injector (170 PS, R100/7, TCS, RTS, RT)**

The **BMW M13111335300** is a high-performance fuel injector designed for the **BMW M108/109 engine family**, commonly found in the **R100/7 (1985 1995)** with **170 PS (125 kW)** tuning potential. These injectors are often sought after for **high-performance builds, turbocharging, or forced induction applications**. Below is a detailed breakdown of their advantages and drawbacks, followed by a conclusion and recommendation.

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### **Pros of the M13111335300 Injector**

1. **High Flow Capacity**

- The **M13111335300** is a **large-bore injector** (typically **400 500 cc/min per injector**, depending on the exact variant) designed to handle **high fuel demand** under forced induction.

- Suitable for **turbocharged or supercharged R100/7 builds**, where stock injectors would be insufficient.

- Can support **nitrous oxide (N2O) applications** without failing prematurely.

2. **Better Fuel Atomization**

- Larger injectors provide **finer fuel spray patterns**, improving combustion efficiency in high-performance engines.

- Reduces the risk of **carbon buildup** compared to smaller injectors under heavy load.

3. **Compatibility with Tuning**

- Works well with **ECU remapping** (e.g., **BMW MAF, Haltech, Link, or standalone ECUs**).

- Can be paired with **larger fuel pumps** (e.g., **Bosch 044, Delphi 750 cc/min, or aftermarket high-flow pumps**) to ensure adequate fuel delivery.

4. **Durability for Forced Induction**

- Built to withstand **higher pressures** than stock injectors, making them a **better choice for turbocharged or nitrous applications**.

- Less prone to **clogging** under high-flow conditions compared to smaller injectors.

5. **Aftermarket Support & Availability**

- Widely available from **European and US suppliers** (e.g., **BMW Performance Parts, ECS, JB4, or eBay sellers**).

- Often sold as **OEM replacements** or **new OEM-equivalent units**, ensuring reliability.

6. **Potential for Higher Power Outputs**

- With proper supporting modifications (fueling, ignition, cooling), these injectors can help **push the R100/7 to 200 PS** without fueling issues.

- Useful for **dyno builds** where stock injectors would be a limiting factor.

---

### **Cons of the M13111335300 Injector**

1. **Higher Cost Compared to Stock**

- **New OEM or high-quality aftermarket injectors** can cost **$100 $250 per injector**, making a full set (**4 injectors**) **$400 $1,000 **.

- More expensive than **stock BMW injectors** or **cheaper aftermarket alternatives** (e.g., **Delphi or Siemens knockoffs**).

2. **Requires Supporting Modifications**

- **Fuel pump upgrade** is **mandatory** stock pumps (e.g., **Bosch 028**) cannot keep up with these injectors.

- **Fuel rail pressure must be increased** (typically **6 10 bar** for forced induction builds).

- **ECU tuning is essential** mismatched fueling can lead to **rich or lean conditions**, reducing performance or causing damage.

3. **Potential for Fueling Issues if Not Properly Set Up**

- **Wasted spark misfires**

- **Carbon buildup**

- **Poor throttle response**

- **Lean conditions** can also occur if the injectors are **oversized for the fuel system**.

4. **Compatibility Concerns with Some R100/7 Variants**

- The **M13111335300** is **primarily for the 170 PS M108/109 engine** (found in **R100/7 TCS, RTS, RT, and some M versions**).

- **Stock 130 PS R100/7 models** may not need these injectors unless heavily modified.

- **M107 engines (pre-1985)** may require **different injector sizes** (e.g., **M13111335299**).

5. **Potential for Leaks or Failure Over Time**

- Like all high-flow injectors, **O-rings and seals can wear out**, leading to **fuel leaks**.

- **Carbon buildup** can occur if the engine runs **too rich** or if the injectors are not cleaned regularly.

- **Electrical resistance drift** may require **recalibration** if the engine is tuned aggressively.

6. **Installation Complexity**

- Requires **removal of the fuel rail, wiring, and ECU adjustments**, which may be **challenging for inexperienced builders**.

- **ECU flashing or remapping** is often needed to prevent **limp mode or fueling errors**.

7. **Not Always Necessary for Stock or Mild Builds**

- If the R100/7 is **stock or mildly tuned (under 150 PS)**, **stock injectors or slightly larger aftermarket ones** may suffice.

- **Upgrading too early** without proper fueling support can lead to **wasted money** if the engine isn t ready for them.

---

### **Conclusion**

The **BMW M13111335300 injector** is a **strong choice for R100/7 owners planning forced induction, nitrous, or high-power builds**. Its **high flow rate, durability, and compatibility with tuning** make it a **reliable upgrade** for those pushing **170 PS or higher**. However, it is **not a drop-in replacement** it requires **fuel pump upgrades, proper ECU tuning, and fuel system adjustments** to function correctly.

For **stock or mildly tuned R100/7s**, these injectors are **overkill and expensive**. But for **serious performance builds**, they are **one of the best options** available, provided the rest of the fueling system is properly matched.

---

### **Recommendation**

- **Upgrade the fuel pump** (e.g., **Bosch 044 or Delphi 750 cc/min minimum**).

- **Install a high-flow fuel pressure regulator** (e.g., **6 10 bar for turbo builds**).

- **Use a tuner (e.g., BMW MAF, Haltech, or standalone ECU)** to match fueling to the new injectors.

- **Consider a fuel system flush** before and after installation to prevent clogging.

- **Monitor fuel pressure and injectors for leaks** during break-in.

- **Stock injectors or slightly larger aftermarket ones (e.g., 450 cc/min)** may suffice for **mild builds (under 150 PS)**.

- **Avoid upgrading injectors without proper fueling support** it can lead to **rich conditions, carbon buildup, or engine damage**.

- **Test fuel pressure and flow** before committing to expensive injectors.

- **Turbocharged R100/7 (TCS, RTS, RT) builds aiming for 170 PS.**

- **Nitrous oxide (N2O) applications** where stock injectors would fail.

- **High-revving, forced induction setups** where fuel delivery is critical.

- If budget is a concern, **check for used OEM injectors** (e.g., from **BMW M cars or high-mileage performance builds**).

- **Delphi or Siemens knockoff injectors** (e.g., **450 500 cc/min**) can be a **more affordable alternative** if properly matched.

- **Test fuel flow** with a **fuel flow meter** before finalizing injectors to ensure the system can handle them.

The **M13111335300 injector is a premium choice for serious R100/7 performance builds**, but it is **not a simple upgrade**. It demands **proper fueling support, tuning, and maintenance**. If you are **seriously modifying your R100/7 for high power**, these injectors are a **wise investment**. If you are **just looking for mild improvements**, consider **smaller upgrades first** to avoid unnecessary costs.

Details:

CONDITION CONTENTS Items may be New, New Open Box, or Used. This product is a genuine BMW part, ensuring perfect fit and reliable performance for your motorcycle. The Original BMW Main Injector is a new and high-quality motorcycle part designed specifically for the BMW R100/7 /T CS RS RTs model's. With this main injector, you can trust that your bike will continue to run smoothly and efficiently, making it a valuable accessory for any BMW motorcycle owner looking maintain the original performance of their vehicle.

Please refer to the for exact condition.

part #: 13111335300 prices

• $15.99-$55.26

specifications intakefuelmotorcycle:

• for models: R100, Rt, Rs
• for makes: Bmw
• mpn: 13111335300
• part type: Injector

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offer intakefuelmotorcycle:

• availability: In Stock
• started: April 8, 2026
• quantity: 1
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• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery

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