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The 2015–2017 S550 Mustang's 3.7L Cyclone V6 makes a healthy 300 hp from the factory — but you'd never know it from the intake note. Ford buried the induction path under a labyrinth of plastic resonators and Helmholtz chambers designed to make the V6 sound like… nothing. The result is an engine that breathes through a muffled straw, suppressing both airflow and the V6's natural induction growl.
This Flashark cold air intake replaces that restrictive factory plumbing with a black powder-coated aluminum intake tube and a high-flow dry cone filter, paired with a metal heat shield that retains the factory lower cold air box. Cold outside air still feeds from the fender well inlet — the difference is how fast it reaches the throttle body, and how good it sounds on the way.
Expect 5-12 WHP and noticeably sharper part-throttle response, but let's be honest about what you're really buying: the moment the throttle opens past 3,500 RPM, that 3.7L finally sounds like a Mustang. No ECU tune, no permanent modifications — a 45-to-75-minute bolt-on that transforms the driving experience.
Key Features
Black powder-coated aluminum intake tube — mandrel-bent for smooth airflow, corrosion-resistant finish designed to last
High-flow dry cone filter — no oil required, cleanable and reusable every 15,000-20,000 miles under normal driving conditions
Metal heat shield — separates the filter from direct engine-bay heat while preserving the factory lower cold air intake box
Retains factory lower cold air box — continues drawing outside air from the fender well inlet, not hot engine-bay air
5-12 WHP gain — honest real-world range on an otherwise stock 3.7L Cyclone V6 (dyno results vary by conditions, fuel, and supporting mods)
Sharper throttle response — reduced intake restriction means the engine reacts faster when you tip into the pedal
Deeper induction growl — the Cyclone V6 finally sounds like a Mustang above 3,500 RPM; calm at cruise, aggressive under throttle
No ECU tune required — plug-and-play with the factory MAF sensor in the correct position; a custom tune is optional for cars with headers, throttle body, or other supporting mods
Bolt-on install — 45-75 minutes with basic hand tools; no cutting, drilling, or permanent modification
Specifications
Material: Aluminum
Tubing Finish: Black powder-coated
Tube Diameter: 3.0 inch (76mm)
Filter Type: Dry cone filter
Filter Media: Synthetic non-woven fabric
Heat Shield: Powder-coated steel
Cold Air Source: Retains factory lower cold air box (fender well inlet)
Installation Time: 45-75 minutes
Weight: Approx. 6.5 lbs (complete kit)
| Years | Make | Model | Engine |
|---|---|---|---|
| 2015 | Ford | Mustang | 3.7L V6 Cyclone (Naturally Aspirated) |
| 2016 | Ford | Mustang | 3.7L V6 Cyclone (Naturally Aspirated) |
| 2017 | Ford | Mustang | 3.7L V6 Cyclone (Naturally Aspirated) |
Q: Will this intake fit a 2017 Mustang V6 3.7L?
A: The 2017 Mustang V6 3.7L shares the identical Cyclone engine, intake manifold, throttle body, MAF sensor, lower cold air box, and engine-bay layout as the confirmed 2015-2016 models. Ford discontinued the V6 after 2017 without changing the intake architecture. While our fitment database currently lists only 2015-2016 explicitly, the physical compatibility is extremely likely — please verify that your factory airbox, throttle-body connection, and MAF housing match the product photos. Contact service@flasharkracing.com if you need confirmation for a specific VIN.
Q: Will this intake fit an EcoBoost or GT Mustang?
A: No. The 2.3L EcoBoost is a turbocharged inline-4 with a completely different intake pipe routing, throttle-body diameter, MAF calibration, and intercooler plumbing. The 5.0L Coyote V8 uses a larger throttle body and different intake geometry. This kit is exclusively designed for the naturally aspirated 3.7L Cyclone V6. Installing it on an EcoBoost or GT will result in MAF errors, poor drivability, and potential engine codes.
Q: Will this fit a 2011-2014 S197 Mustang V6 (3.7L)?
A: No. The 2011-2014 S197 Mustang V6 uses the same 3.7L Cyclone engine block, but the engine bay layout, airbox location, and intake routing differ from the 2015+ S550 platform. The S550's lower cold air box and mounting points are not shared with the S197 generation.
Q: How much horsepower does this intake actually add to the 3.7L Cyclone?
A: Expect 5-12 WHP on an otherwise stock 3.7L V6. The Cyclone engine breathes reasonably well from the factory — Ford's stock intake on the S550 is not terrible, and the main restriction is noise suppression (resonators and baffles), not airflow starvation. The majority of the gain comes from the smoother tube path and reduced filter restriction, rather than from a dramatic increase in airflow. Gains are most noticeable in the 3,500-6,500 RPM range. Cars with a cat-back exhaust, aftermarket headers, or custom ECU tuning may see results at the upper end of this range.
Q: Does this intake require an ECU tune?
A: No. The intake is designed to work with the factory ECU calibration when the stock MAF sensor is correctly installed in the provided housing. The MAF housing diameter is matched to factory airflow readings, so fuel trims stay within the ECU's adaptive range. A custom tune is optional and may unlock additional gains — particularly if your Mustang already has a cat-back exhaust, long-tube headers, an upgraded throttle body, or E85 flex-fuel capability.
Q: Will this intake make my V6 Mustang louder?
A: Yes — and this is honestly the #1 reason V6 owners buy this kit. The factory intake uses multiple resonators and Helmholtz chambers specifically to silence the induction note. Removing those restrictions and adding an open-element cone filter produces a deep, throaty induction growl that becomes prominent above 3,500 RPM. At idle and light cruise, the sound remains close to stock. Under hard acceleration, you'll hear the engine breathing — the Cyclone V6 has a genuinely good tone that Ford engineered out of the cabin. It does not change your exhaust note; it adds an intake soundtrack.
Q: Is this a true cold air intake or a short ram?
A: It's a hybrid design. The kit includes a metal heat shield that surrounds the filter and seals against the hood, and it retains the factory lower cold air intake box — a plastic duct that draws outside air from the fender well. This means the filter is fed by cooler outside air rather than by air pulled from the hot engine bay. Once the car is moving at road speed, the heat shield + lower duct combination keeps intake air temperatures within 5-15°F of ambient. For a daily-driven or weekend V6 Mustang, this is the right balance of sound, simplicity, and thermal management.
Q: Can this intake cause a check engine light (CEL)?
A: A properly installed intake should not trigger a CEL. The three most common causes: (1) MAF sensor installed backward — the sensor has a directional arrow; (2) vacuum leak at a coupler or breather connection — tighten all clamps; (3) unmetered air entering after the MAF — check for gaps around the couplers and heat shield seal. If a CEL appears, re-check these three items before suspecting a product defect. Disconnecting the battery for 15 minutes will reset fuel trims if needed.
Q: Will this intake improve fuel economy on my V6 Mustang?
A: Reduced intake restriction can support slightly more efficient operation during steady highway cruising, but a measurable MPG improvement is not guaranteed. The reality is that the louder induction sound encourages more aggressive throttle use — and that will eat any theoretical efficiency gain. Your driving style, transmission choice, rear-end gearing, and fuel quality have a much larger impact on MPG.
Q: How do I clean the dry filter, and how often?
A: Clean every 15,000-20,000 miles (more often in dusty conditions). Tap gently to dislodge debris, use compressed air (max 30 PSI) from inside outward. For heavy contamination, rinse with low-pressure water from the inside out and air-dry completely (4-6 hours). Do not apply oil to this filter. The Cyclone's MAF sensor is sensitive — filter oil can contaminate the sensing element, causing incorrect airflow readings and a CEL.
Q: What's the hardest part of the installation?
A: The two most time-consuming steps: (1) removing the factory resonator assembly from the fender well — requires loosening the inner fender liner; (2) positioning the heat shield to seal properly against the hood. Neither step requires special tools. The rest — removing the airbox lid, swapping the MAF sensor, clamping the tube and couplers — is straightforward. Total install time: 45-75 minutes.
Q: What maintenance items should I check alongside this intake?
A: A cold air intake will not fix issues caused by: a dirty MAF sensor, a clogged PCV valve, vacuum leaks, worn spark plugs, a dirty throttle body, or aged oxygen sensors. If your Mustang has over 75,000 miles, consider cleaning the throttle body and MAF sensor before installation. After installing, re-tighten all clamps after the first 100 miles and again after 500 miles — silicone couplers settle after heat cycles.
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