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GM-12709475 Fuel Injectors Set

fits model: Lt4.

Gm-12709475 Oem Lt4 Fuel Injectors Set Of 8 Brand New Never Installed

( Manufacturer Part Number: GM-12709475 ), ( Brand: Oem ), ( Type: Fuel Injector ), ( Manufacturer Warranty: 1 Year ), ( Items Included: O-ring ), ( Vintage Part: No ), ( Item Weight: 5 Lb ), ( Country Of Origin: United States ), ( Fuel Type: Gasoline )

Review Fuel Injectors Set Of New Never Installed fits LT4

The **GM 12709475 LT4 Fuel Injectors Set** represents a high-performance upgrade designed specifically for General Motors LT4 engine, found in vehicles like the 2014 2019 Chevrolet Corvette Stingray and the 2014 2019 Cadillac CTS-V. This meticulously engineered set of fuel injectors is crafted to deliver superior fuel atomization, precision metering, and enhanced combustion efficiency, ensuring optimal performance under both mild and extreme driving conditions. Built with advanced **multi-hole nozzle technology**, these injectors feature a **12-hole spray pattern** that promotes a more uniform fuel-air mixture, reducing combustion inefficiencies and minimizing carbon buildup on intake valves a common issue in high-performance applications. Constructed from **high-grade stainless steel and precision-machined components**, the injectors are engineered to withstand the intense pressures and temperatures generated by the LT4 s forced-induction system, which can exceed **1,200 psi** in boosted applications. Each injector is paired with a **high-flow solenoid** and a **sealed O-ring assembly** to prevent leaks, ensuring consistent operation even under aggressive throttle inputs or high-RPM scenarios. The set is fully compatible with GM s **EFI (Electronic Fuel Injection) system** and is designed to work seamlessly with the LT4 s **direct-injection architecture**, providing the necessary fuel delivery for peak horsepower and torque outputs. Whether used for street tuning, track days, or full-blown engine modifications, these injectors are a critical component for those seeking to maximize the LT4 s potential while maintaining reliability and longevity. Backed by GM s engineering standards, this set is an ideal choice for enthusiasts looking to fine-tune their vehicle s performance without compromising on quality or durability.

**Pros and Cons of buying a GM 12709475 LT4 Fuel Injectors Set**

**Pros:**

1. **High Performance and Reliability** The LT4 fuel injectors are designed for high-performance applications, delivering precise fuel delivery for optimal engine performance. They are engineered to handle the demands of high-output engines, ensuring consistent and efficient fuel metering.

2. **OEM Quality** These injectors are manufactured by General Motors, meaning they meet the same rigorous standards as original equipment parts. This ensures compatibility with the LT4 engine and reduces the risk of premature failure or performance issues.

3. **Durability** The LT4 injectors are built to last, with robust construction that can withstand the stresses of high-flow applications. They are designed for long-term use, reducing the need for frequent replacements.

4. **Compatibility** These injectors are specifically engineered for the LT4 platform, which includes engines like those found in the Corvette Z06, C7 Corvette, and other high-performance GM applications. This ensures a seamless fit and proper function without modification.

5. **Fuel Efficiency and Emissions Compliance** The injectors are tuned to provide efficient fuel delivery, which can help maintain fuel economy and meet emissions standards when properly calibrated.

6. **Warranty Coverage** GM typically offers warranties on OEM parts, providing some level of protection against defects or premature failure, though coverage details should be verified at the time of purchase.

7. **Aftermarket Support** Due to their popularity in performance tuning, these injectors have a strong aftermarket support system. This includes availability of tuning software, diagnostic tools, and replacement parts.

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**Cons:**

1. **Cost** GM OEM parts, especially high-performance components like these injectors, can be expensive. The price may be prohibitive for budget-conscious buyers or those not planning extensive modifications.

2. **Installation Complexity** Installing fuel injectors requires careful handling, proper sealing, and precise wiring. If not installed correctly, it can lead to leaks, poor performance, or even engine damage. This may necessitate professional installation, adding to the overall cost.

3. **Tuning Required** Replacing injectors often requires recalibration of the engine management system (ECU) to account for the new flow rates. Without proper tuning, the engine may run poorly, experience fueling issues, or even stall. This may require a tuner or ECU programmer.

4. **Limited Availability** While these injectors are widely used, they may not always be in stock at local dealerships or auto parts stores. Purchasing may require ordering online, which could involve shipping delays or additional costs.

5. **Potential for Counterfeit Parts** As with any popular OEM part, there is a risk of purchasing counterfeit or low-quality replicas. Buying from authorized dealers or reputable sellers (e.g., GM parts stores, trusted online retailers) helps mitigate this risk.

6. **Compatibility with Modifications** If the engine has been heavily modified (e.g., forced induction, significant power increases), the stock LT4 injectors may not be sufficient. Upgraded injectors or additional fueling upgrades (e.g., fuel pump, fuel rail) may be necessary to match the engine s demands.

7. **Maintenance Requirements** Fuel injectors require periodic cleaning and maintenance to prevent clogging or failure. Neglecting maintenance can lead to reduced performance or injector failure over time.

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**Conclusion:**

The GM 12709475 LT4 fuel injectors set is an excellent choice for those seeking reliable, high-performance fuel delivery for their LT4 engine. They offer OEM quality, durability, and compatibility, making them a solid option for both stock and lightly modified applications. However, the high cost, installation complexity, and tuning requirements can be significant drawbacks, particularly for DIY enthusiasts or those on a tight budget. If you are planning to keep the engine within its stock or near-stock power range and have access to professional installation and tuning, these injectors are a worthwhile investment. For heavily modified engines or those requiring frequent upgrades, evaluating higher-flow injectors or additional fueling components may be necessary.

**Recommendation:**

If you are replacing worn or failing injectors in a stock or mildly modified LT4 engine and can afford the cost, the GM 12709475 injectors are a reliable and high-quality option. Purchase from an authorized GM parts dealer or a trusted online retailer to avoid counterfeit parts. Budget for professional installation and tuning to ensure optimal performance. If your engine is heavily modified or you are on a tight budget, consider consulting with a performance tuner to determine whether these injectors are sufficient or if upgrades are needed. For long-term reliability, pair the injectors with a fuel system maintenance plan, including regular injector cleaning and fuel system flushes.

Details:

I have a brand new set of 8 injectors and seals as well the retainer clips. These are for an LT4 engine but can be used in any application. Never used, only took 1 out of packaging for photos.

part #: gm12709475 price

  • $625.00

specifications carfuelinjector:

  • for models: Lt4
  • mpn: Gm-12709475
  • brand: Oem
  • type: Fuel Injector
  • manufacturer warranty: 1 Year
  • items included: O-ring
  • vintage part: No
  • item weight: 5 Lb
  • country of origin: United States
  • fuel type: Gasoline

shipping carfuelinjector:

  • cost: $0.00
  • carrier: USPS
  • service: USPS Ground Advantage
  • class: Standard
  • transit: 5-10 Days
  • type: Calculated

seller carfuelinjector:

  • # reviews: 17
  • rating: 100.0%
  • city: Lancaster, Pennsylvania

general carfuelinjector:

  • Air Fuel Delivery > Fuel Injection Parts > Fuel Injectors
  • condition: New

returns carfuelinjector:

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

payments carfuelinjector:

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

offer carfuelinjector:

  • quantity: 1
  • started: February 18, 2026
  • sold: 0
  • options: Ship-to-home
  • best offers: True
  • availability: In Stock
for models: lt4, type: fuel injector, manufacturer warranty: 1 year, items included: o-ring, vintage part: no, item weight: 5 lb, country of origin: united states, fuel type: gasoline,
category: auto parts > air fuel delivery > fuel injection parts > fuel injectors, sku: 14803582451212663,
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1 offer $625.00 USD
  • New. Offer #1 priced at $625.00 + $0.00 shipping estimate = $625.00* total. These are for an LT4 engine but can be used in any LT application.FREE SHIPPING

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