Understanding Performance Intake Systems

A performance intake system replaces your Infiniti’s restrictive factory air box and intake tube with a high-flow air filter and a larger-diameter, smoother tube. This design allows the engine to draw in cooler, denser air more efficiently, improving combustion and unlocking additional horsepower and torque. For Nashville drivers who enjoy the area’s winding roads or simply want a more responsive daily driver, this upgrade is one of the most cost-effective ways to enhance your Infiniti’s performance.

Modern Infiniti engines, such as the VQ-series V6 and the VR-series turbocharged units, respond well to increased airflow. By reducing the intake restriction, the engine can breathe easier, especially at higher RPMs. Many aftermarket systems also use mandrel-bent tubing to eliminate sharp bends that disrupt airflow, and they often include heat shields to separate the filter from engine heat. This combination of improved flow and cooler air can yield gains of 5–15 horsepower and similar increases in torque, depending on the model and tuning.

It’s important to note that a performance intake is not just about peak power. It also sharpens throttle response, making the car feel more eager when you press the pedal. Additionally, many owners report a more aggressive intake sound under acceleration—a deep, sporty growl that enhances the driving experience without being intrusive at cruising speeds.

Types of Performance Intakes: Cold Air vs. Short Ram

When shopping for an intake upgrade, you’ll encounter two main types: cold air intakes and short ram intakes. Each has its own characteristics and trade-offs.

Cold Air Intakes (CAI)

A cold air intake relocates the air filter outside the engine bay, often into the front bumper, inner fender, or lower grille area. This placement allows it to pull in cooler, denser air from outside, which can improve combustion efficiency and produce more power. Because the filter is far from the hot engine, the incoming air temperature is significantly lower than underhood air. Many CAI systems also include a heat shield or enclosed box to further insulate the filter from engine heat.

The main drawback is that the filter is lower and more exposed to road debris, water, and puddles. In Nashville’s rainy seasons, driving through deep standing water could risk hydrolocking the engine if the filter becomes submerged. However, most reputable brands design their CAI kits with water-blocking features or recommend a hydroshield filter sock for extra protection. Also, installation tends to be more involved because it requires routing the intake tube through the engine bay and positioning the filter securely.

Short Ram Intakes (SRI)

A short ram intake keeps the air filter inside the engine bay, usually mounted directly on the throttle body or close to it, with a short tube. This simplicity makes installation very straightforward—often a DIY job that takes under an hour with basic tools. Because the filter is located in the engine bay, it draws in hotter air than a CAI, which can slightly reduce the power gains compared to a true cold air system. However, many modern SRIs include a well-designed heat shield to minimize heat soak.

The advantage of an SRI is its lower cost, easier maintenance, and better protection against water ingestion. It also produces a louder intake noise, which some enthusiasts love. For Nashville drivers who don’t plan to track their car daily, an SRI can be a great balance of performance and convenience.

Key Factors to Consider When Choosing an Intake

Before making a purchase, evaluate these critical factors to ensure the system is right for your Infiniti and your Nashville lifestyle.

Vehicle Compatibility

Intake systems are designed for specific engine configurations. Always verify that the kit is compatible with your Infiniti’s exact model, year, and engine. For example, an intake designed for a 2015 Q50 3.7L will not fit a 2020 Q50 3.0T. Check the manufacturer’s website or contact a reputable dealer to confirm fitment.

Filter Quality and Type

The filter is the heart of the intake system. Look for filters made by well-known brands such as K&N, AEM, or aFe. These use oiled cotton gauze or dry synthetic media that provide excellent airflow while trapping fine particles. Dry filters require no oiling, making maintenance simpler, while oiled filters generally flow more air but need periodic re-oiling. Choose based on your willingness to perform regular cleaning.

Material and Construction

Intake tubes come in various materials: silicone (flexible, absorbs vibration, but may soften under extreme heat), aluminum (lightweight, rigid, dissipates heat quickly), and plastic/composite (inexpensive, insulates well but can crack over time). For most Nashville drivers, a high-quality powder-coated aluminum or multi-layer silicone tube offers the best durability and performance.

Installation Complexity

Short ram intakes are generally DIY-friendly, while cold air intakes may require removal of the bumper or wheel well liner. If you are not comfortable with basic mechanical work, budget for professional installation. Many Nashville performance shops offer installation services and can also fine-tune the engine management system if needed.

Tennessee does not require emissions testing for most vehicles, but Nashville has adopted some federal and state clean air regulations. Aftermarket intake systems must not tamper with or disable any emissions control device. Most reputable intake manufacturers have CARB EO numbers (California Air Resources Board Executive Orders) that certify their systems for legal use in all 50 states, including Tennessee. Look for systems that are labeled “50-state legal” to avoid potential issues. Installing an intake that removes or bypasses the mass airflow sensor (MAF) or positive crankcase ventilation (PCV) system is illegal and can cause check engine lights. Always choose a system that retains all factory sensors and hoses.

Benefits of Upgrading to a Performance Intake

Beyond the standard claims of more power, a quality intake system offers several tangible improvements that enhance your driving experience on Nashville roads.

Increased Horsepower and Torque

By reducing restriction and delivering cooler air, the engine can produce more power throughout the RPM range. While peak gains are modest (typically 5–15 hp), the improvement in mid-range torque often feels more dramatic in everyday driving, making hills and merging onto interstates feel effortless.

Better Throttle Response

Because the intake path is shorter and smoother, the engine responds more quickly to changes in the accelerator pedal. This eliminates the slight lag that stock systems can exhibit, giving the car a livelier feel.

Improved Fuel Economy

With more efficient combustion, the engine can extract more energy from each drop of fuel. Many drivers report a 1–3 mpg improvement under normal driving conditions. However, the extra power often tempts drivers to use more throttle, which can offset gains. Conservative driving can help maximize fuel savings.

Enhanced Engine Sound

One of the most enjoyable side effects is a deeper, more aggressive intake growl during hard acceleration. The sound is especially satisfying in Infiniti’s VQ and VR engines, known for their smooth yet sporty notes. At cruising speeds, the intake is usually quiet enough not to disturb cabin comfort.

Lightweight and Aesthetic Appeal

Many aftermarket intake systems are lighter than the bulky factory plastic boxes, reducing weight over the front axle. Additionally, a polished aluminum tube or a colorful silicone hose can dress up the engine bay, adding a custom look to your Infiniti.

Nashville-Specific Considerations

Your local environment can influence the performance and longevity of your new intake system.

Climate

Nashville experiences hot, humid summers and mild winters. In summer, underhood temperatures can soar, making a cold air intake with a good heat shield especially beneficial. Conversely, the moderate winters mean cold air intakes won’t risk icing issues. The high humidity can encourage moisture in the intake, so using a filter with a hydroshield or choosing a short ram can reduce the risk of water ingestion during sudden downpours.

Road Conditions

Nashville’s roads vary from smooth highways to pothole-ridden city streets. If you frequently drive in construction zones or rural areas with gravel, a low‑mounted CAI filter is more prone to dust and debris. In such cases, a short ram or a CAI with a pre‑filter sock is advisable.

Local Tuning and Performance Shops

Several reputable tuners in the Nashville area specialize in Infiniti and Nissan platforms. Shops like Z1 Motorsports (online retailer with deep Infiniti knowledge) or local installers such as Nashville Speed and Performance can recommend the best setup for your specific model and climate. Professional installation ensures proper fitment and can include a dyno tune to maximize gains.

Installation Guide: Steps to Fit an Intake System

If you decide to install the intake yourself, follow these general steps. Always refer to the specific instructions provided with your kit.

  1. Disconnect the battery (negative terminal) to prevent any accidental electrical shorts while working near the engine bay.
  2. Remove the factory air box and intake tube. This usually involves unclipping the air filter housing, disconnecting the MAF sensor wiring, and loosening hose clamps.
  3. Install the new intake components in the order specified by the manufacturer. Start by mounting the filter in its designated location (fenderwell or behind the grille for CAI; near the throttle body for SRI).
  4. Attach the intake tube, ensuring all couplers and clamps are tight but not overtightened. Route the tube away from moving parts and sharp edges.
  5. Reconnect the MAF sensor and any other sensors (IAT, PCV). Use the included wiring harness extensions if necessary.
  6. Double-check all connections, then reconnect the battery.
  7. Start the engine and check for any vacuum leaks. Listen for abnormal whistling or hissing. Take a short test drive and monitor for check engine lights.

Most installations take 1–2 hours. If you are unsure about any step, consult a professional shop. Improper installation can cause MAF sensor issues or allow unfiltered air into the engine.

Maintenance and Cleaning Tips

To keep your intake performing at its best, regular maintenance is required.

  • Inspect the filter every 3,000–5,000 miles or at every oil change. If it appears dirty, clean or replace it according to the manufacturer’s instructions.
  • For oiled cotton filters (e.g., K&N), use the brand’s cleaning and re‑oiling kit. Over-oiling can contaminate the MAF sensor, so apply evenly and let the filter sit for 10 minutes before reinstalling.
  • For dry filters (e.g., AEM DryFlow), use a vacuum with a brush attachment or tap out loose dirt. They can be washed with mild soap and water every 50,000 miles.
  • Check the intake tube and couplings for cracks, looseness, or debris. Replace any worn parts.
  • Ideal for Nashville: After heavy rains, inspect the filter for moisture. If you have a CAI with a low filter, consider installing a water‑resistant pre‑filter.

Top Infiniti Models for Intake Upgrades

While any Infiniti can benefit from a performance intake, certain models are especially popular among enthusiasts:

  • Q50/Q60 3.0T (VR30DDTT) – The twin-turbo V6 loves increased airflow. Intakes can support higher boost from custom tunes, making this one of the most rewarding platforms.
  • G37 (VQ37VHR) – A naturally aspirated V6 that responds well to intake and exhaust upgrades. Many owners pair an intake with a tune for 300+ whp.
  • Q70 5.6L V8 – While heavier, the V8 engine benefits from a cold air intake to improve low‑end torque for effortless cruising.
  • EX/FX/M series – These crossover and sedan platforms see sharper throttle response and modest economy gains.

Conclusion

Choosing the right performance intake system for your Infiniti in Nashville is about balancing power gains, legal compliance, local driving conditions, and your own preferences. Whether you opt for a cold air setup for maximum performance or a short ram for simplicity and sound, the upgrade will transform your driving experience. Start by researching trusted brands like Stillen, Z1 Motorsports, and aFe Power, all of which offer direct‑fit kits for Infiniti models. Consult a local Nashville shop for installation and tuning to ensure you get the most from your investment. With the right intake, your Infiniti will deliver more power, better sound, and a more engaging drive on every road Music City has to offer.