FORD 337-UNK Bbk Power Throttle Body Spacer 73MM 3.7L

( Part Type: Throttle Spacer ), ( Ipn: 337-unk ), ( Manufacturer Warranty: 6 Month ), ( Warranty Length: 6 Month Warranty ), ( Partout Id: A-119151826 )

Review FORD Bbk Power Plus 73mm Throttle Body Spacer From 3.7l fits MUSTANG 2014

The **Ford 337-UNK BBK Power 73mm Throttle Body Spacer** is a meticulously engineered aftermarket component designed specifically for the **2014 Ford Mustang with the 3.7L Coyote engine (UNK code)**, particularly those equipped with the **BBK (Big Block Kit) or high-performance builds** aiming to maximize airflow and throttle response. This high-quality spacer is crafted to replace the stock 60mm throttle body with a **73mm unit**, a modification that significantly enhances breathing capacity, allowing for greater horsepower and torque potential while maintaining smooth operation under aggressive driving conditions. The spacer is built with precision, featuring a **durable aluminum construction** that ensures structural integrity and resistance to heat, making it ideal for both street and track applications. Its seamless integration with the stock intake manifold and ECU compatibility allows for a straightforward installation, though it may require a tune to optimize performance and prevent potential stumbling or hesitation. This upgrade is particularly beneficial for those running **turbocharged or supercharged setups**, as it reduces backpressure and improves throttle response, delivering a more engaging and responsive driving experience. Whether you're pushing the limits on the track or simply seeking a noticeable boost in daily drivability, this throttle body spacer is a cost-effective yet impactful addition to any high-performance Coyote engine build.

The **Ford 337-UNK BBK Power 73mm Throttle Body Spacer** is a popular aftermarket component designed to improve throttle response and airflow in the **2014 Mustang with a 3.7L Coyote engine**. Below is a detailed breakdown of its pros and cons, followed by a conclusion and recommendation.

---

### **Pros of the 73mm Throttle Body Spacer**

1. **Improved Throttle Response** The spacer increases the diameter of the throttle body from the stock 58mm to 73mm, allowing more air to flow through. This results in quicker throttle response, especially noticeable in low-RPM situations, such as off-throttle downshifts or light acceleration.

2. **Better Engine Breathing at Low RPMs** The stock throttle body can be restrictive at lower RPM ranges, leading to a "flat spot" in power delivery. The larger throttle body helps mitigate this by allowing smoother airflow, which can make the engine feel more responsive in city driving or stop-and-go traffic.

3. **Compatibility with Tuning** Since the spacer increases airflow, it pairs well with ECU tunes (such as Haltech, SCT, or APEXI) that can optimize fuel delivery for the increased air intake. This can lead to better overall performance when paired with a tune.

4. **Easy Installation** The spacer is a bolt-on modification that requires minimal tools and expertise to install. It does not require engine disassembly, making it a straightforward upgrade for DIY enthusiasts.

5. **Cost-Effective Performance Boost** Compared to more extensive modifications like turbocharging or forced induction, the throttle body spacer is relatively inexpensive and provides noticeable improvements without requiring major engine work.

6. **Potential for Better Fuel Economy (Under Tuning)** While the spacer itself does not improve fuel efficiency, when paired with a properly tuned ECU, it can help optimize air-fuel ratios, potentially leading to better efficiency in some driving conditions.

7. **No Major Voiding of Warranty** Unlike forced induction or engine modifications, installing a throttle body spacer does not typically void the factory warranty, as it does not alter the engine s internal components.

---

### **Cons of the 73mm Throttle Body Spacer**

1. **Limited Power Gains at High RPMs** While the spacer helps at low and mid-RPM ranges, it does not significantly improve airflow at high RPMs. For serious power gains, additional modifications (such as a turbocharger, supercharger, or larger intake) are still required.

2. **Requires a Tune for Optimal Performance** Installing the spacer without a corresponding ECU tune can lead to lean conditions, rough idle, or poor drivability. A proper tune is necessary to adjust fuel delivery and ignition timing to match the increased airflow.

3. **Potential for Rough Idle or Stalling** If the engine is not tuned or if there are other underlying issues (such as vacuum leaks or dirty MAF sensors), the spacer can cause rough idling or stalling, especially during cold starts.

4. **No Direct Horsepower Increase** The spacer does not add horsepower on its own; it merely improves throttle response and airflow dynamics. For actual power gains, additional modifications (such as a tune, intake, or exhaust) are needed.

5. **Possible Compatibility Issues with Certain Accessories** Some aftermarket accessories, such as cold air intakes or high-flow cat-back exhausts, may need to be upgraded or tuned alongside the throttle body spacer to avoid conflicts or poor performance.

6. **Minimal Impact on Top-End Power** The Coyote engine s power is largely derived from its high-RPM capabilities. The throttle body spacer does little to enhance this, so enthusiasts looking for significant top-end power gains will need to pursue other modifications.

7. **Potential for Increased Engine Wear Without Proper Maintenance** If the engine is not properly maintained (such as oil changes, valve adjustments, or cooling system checks), the increased airflow from the spacer could exacerbate wear over time, especially in high-performance applications.

---

### **Conclusion**

The **Ford 337-UNK BBK Power 73mm Throttle Body Spacer** is a useful modification for the **2014 Mustang 3.7L Coyote engine**, particularly for those seeking improved throttle response and smoother low-RPM operation. It is a relatively simple, cost-effective upgrade that can enhance drivability and pair well with tuning. However, it is not a standalone power-adding modification and should be paired with a proper ECU tune to avoid drivability issues.

For enthusiasts looking to **enhance daily drivability, reduce flat spots, and prepare the engine for future modifications**, the spacer is a worthwhile addition. For those seeking **significant horsepower gains or high-RPM performance**, additional modifications will be necessary.

---

### **Recommendation**

If you are looking to **improve throttle response, reduce the "flat spot" in the stock Coyote engine, and prepare for future tuning or modifications**, the **73mm throttle body spacer is a solid choice**. Here s how to approach it:

1. **Install the Spacer First** Fit the spacer before making any other modifications, as it will help optimize airflow for subsequent upgrades.

2. **Get a Professional Tune** Invest in a **custom ECU tune** (such as from Haltech, SCT, or APEXI) to adjust fuel delivery and ignition timing for the increased airflow. This is critical to avoid lean conditions or drivability issues.

3. **Pair with Complementary Modifications** Consider upgrading the **intake manifold, MAF sensor, or exhaust system** to further enhance performance. A **high-flow cold air intake** or **performance exhaust** can work well alongside the spacer.

4. **Monitor Engine Health** Ensure the engine is well-maintained with **fresh oil, proper cooling, and regular inspections** to prevent wear from increased airflow.

5. **Test and Adjust** After installation, take the car for a **test drive** and work with your tuner to fine-tune the ECU settings for optimal performance.

**Final Verdict:** The **73mm throttle body spacer is a valuable upgrade for the 2014 Mustang 3.7L**, especially for those prioritizing throttle response and drivability. However, it should be part of a **larger performance plan** that includes tuning and complementary modifications for the best results. If you re only looking for minor improvements, the spacer alone will provide noticeable benefits, but for serious power gains, further upgrades will be necessary.

Details:

May fit other years and model's.

specifications throobo:

• for models: Mustang
• for makes: Ford
• for years: 2014
• part type: Throttle Spacer
• ipn: 337-unk
• manufacturer warranty: 6 Month
• warranty length: 6 Month Warranty
• partout id: A-119151826

offer throobo:

• started: March 23, 2026
• sold: 0
• availability: In Stock
• quantity: 1
• options: Ship-to-home

seller throobo:

• rating: 98.4%
• city: Conway, Arkansas
• # reviews: 499212

returns throobo:

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

shipping throobo:

• class: Standard
• cost: $0.00
• type: Fixed
• service: UPS Ground
• carrier: UPS
• transit: 3-9 Days

payments throobo:

• wallet: Paypal
• credit card: Diners-club
• other

general throobo:

• condition: Used
• Car Truck Parts Accessories > Air Fuel Delivery > Throttle Bodies

Ford 337-UNK Is Similar To:

• D32e-9a589ab Ford Mustang Barrel Spacer And Egr (21.4% similar) Store hours: Tue. 10A-5P sat mustang 351C 4v 4 barrel spacer and erg D32E-9A589AB please see the photos as to what you'll be receiving...(May 10th, 2018)
• 022-00-016b Boomba Racing Throttle Body Spacer Black For Ford 753760203616 (40.8% similar) This spacer adds volume to your intake plenum. The spacer also includes a 1/8 not port that can be used for variety of purposes. Bombay racing throttle body spacer black for ford focus st made from premium billet aluminum, is excited to announce our spacers. This has been shown to aide in cylinder ...(August 4th, 2018)
• 022-00-016blue Boomba Racing Throttle Body Spacer Blue For Ford 753760203623 (41.5% similar) In the picture shown above, you can see Dino charts of this spacer paired with our intake manifold and gains are tremendous. Bombay racing throttle body spacer blue for ford focus st made from premium billet aluminum, is excited to announce our spacers. Over 30 ft lbs of torque in using both spacers...(April 8th, 2018)
• 022-00-016n Boomba Racing Throttle Body Spacer Silver For Ford 753760203630 (43% similar) Please see the for information regarding shipping costs and available methods. This has been shown to aide in cylinder filling at lower rpm, smooth out throttle response, build boost sooner, and length en the effective wave pulse of intake charge. In the picture shown above, you can see Dino charts...(August 4th, 2018)
• 025-00-009b Boomba Racing Throttle Body Spacer Black For Ford 753760204217 (42% similar) Please see the for information regarding shipping costs and available methods. Purchase from map to receive aggressive pricing and retain your manufacturers warranty. This spacer adds volume to your intake plenum. In the picture shown above, you can see Dino charts of this spacer paired with our ...(December 6th, 2018)
• 025-00-009blue Boomba Racing Throttle Body Spacer Blue For Ford 753760204224 (41.5% similar) Exclusively for this has been shown to aide in cylinder filling at lower rpm, smooth out throttle response, build boost sooner, and length en the effective wave pulse of intake charge. The spacer also includes a 1/8 not port that can be used for variety of purposes. Purchase from map to receive ...(November 26th, 2018)
• 025-00-009r Boomba Racing Throttle Body Spacer Red For Ford 753760204248 (40% similar) This spacer adds volume to your intake plenum. Please see the for information regarding shipping costs and available methods. Purchase from map to receive aggressive pricing and retain your manufacturers warranty. In the picture shown above, you can see Dino charts of this spacer paired with our ...(November 26th, 2018)
• 025-00-011b Boomba Racing Throttle Body Spacer Black For Ford 753760204293 (42% similar) In the picture shown above, you can see Dino charts of this spacer paired with our intake manifold and gains are tremendous. Please see the for information regarding shipping costs and available methods. Over 17 ft lbs of torque on our fiesta st in using both spacers and a significant change the ...(November 26th, 2018)
• 025-00-011blue Boomba Racing Throttle Body Spacer Blue For Ford 753760204309 (42.8% similar) The spacer also includes a 1/8 not port that can be used for variety of purposes. This spacer adds volume to your intake plenum. It ships with a plug in the port for those not wanting to use. Over 17 ft lbs of torque on our fiesta st in using both spacers and a significant change the horsepower ...(November 26th, 2018)
• 025-00-011n Boomba Racing Throttle Body Spacer Silver For Ford 753760204316 (44.3% similar) Over 17 ft lbs of torque on our fiesta st in using both spacers and a significant change the horsepower curve. This spacer adds volume to your intake plenum. In the picture shown above, you can see Dino charts of this spacer paired with our intake manifold and gains are tremendous. It ships with a ...(November 26th, 2018)
• 025-00-011r Boomba Racing Throttle Body Spacer Red For Ford 753760204323 (41.3% similar) Over 17 ft lbs of torque on our fiesta st in using both spacers and a significant change the horsepower curve. In the picture shown above, you can see Dino charts of this spacer paired with our intake manifold and gains are tremendous. This has been shown to aide in cylinder filling at lower rpm, ...(November 16th, 2018)