Installing a Nismo cold air intake on your Nissan 370Z is one of the most effective bolt-on modifications to unlock additional horsepower and throttle response. While the stock air intake system is designed for quiet operation and cost efficiency, it restricts airflow and traps heat under the hood. The Nismo intake, engineered by Nismo (Nissan Motorsports), is a dedicated performance upgrade that flows significantly more air, reduces intake air temperature, and delivers a genuine 15‑horsepower gain at the wheels when paired with a proper tune or even without one on many model years. This step‑by‑step guide walks you through the entire installation process, covers essential safety precautions, and provides expert tips to ensure your new intake performs flawlessly long term.

Why Upgrade to a Nismo Intake?

Before diving into the tools and steps, it helps to understand what makes the Nismo intake different from aftermarket alternatives. Nismo parts are developed by Nissan’s in‑house performance division, so they are designed to integrate seamlessly with factory specifications. The Nismo intake features a larger‑diameter duct, a high‑flow cotton filter, and a heat shield that isolates the filter from engine bay heat. This design allows the engine to breathe cooler, denser air, which improves combustion efficiency. Many owners report not only the advertised 15 hp gain but also a deeper, more aggressive intake sound under hard acceleration. For daily driving and track use alike, the Nismo intake is a reliable, factory‑inspired upgrade that does not trigger check‑engine lights or require re‑tuning in most cases.

Tools and Materials Needed

Having the correct tools on hand before you begin will save time and prevent frustration. Below is a complete checklist, with notes on alternatives and sizes.

  • Nismo intake kit (part number 14820‑RS520, though it may vary by model year). Verify you have the correct kit for your 370Z’s year range (2009‑2020).
  • Metric socket set (8 mm, 10 mm, 12 mm, and 14 mm are most common). A ratcheting wrench set can make tight spots easier.
  • Flathead screwdriver (medium size) – for loosening spring‑type hose clamps.
  • Phillips screwdriver – for some airbox screws and electrical connectors.
  • Torque wrench (3/8‑inch drive, range 1–25 lb‑ft) – essential for tightening the throttle body bolts to spec.
  • Rubber or nitrile gloves – keeps oil and grime off your hands and protects the intake filter from oils.
  • Shop towels or lint‑free rags – to wipe down connections and any residual dust.
  • Flashlight or work light – the engine bay can be shadowy near the throttle body.
  • Penetrating oil (optional) – helpful if any bolts are rusted or stuck.

Preparation and Safety

A well‑prepared workspace and a few safety checks will make the installation smooth and prevent damage to your 370Z.

1. Choose a clean, level work area.

Work on flat ground, preferably in a garage or shaded area. Cold engine components are preferable; if the car has been driven, allow the engine to cool for at least 30 minutes. Hot metal can burn skin, and intake tubes become pliable and difficult to remove when hot.

2. Disconnect the battery – negative terminal first.

Always start with the negative battery terminal. Use a 10 mm socket to loosen the bolt and lift the terminal off the post. Tuck the cable aside, insulated from any metal contact. This step prevents accidental short circuits and resets the ECU, which will adapt to the new intake airflow when you restart.

3. Remove any loose objects near the engine.

Take out items like the strut tower brace (if equipped) or any aftermarket covers. You need clear access to the top and sides of the engine.

4. Wear eye protection.

Dust, old filter debris, and small plastic clips can fly up. Safety glasses are cheap insurance.

Step‑by‑Step Installation Guide

Follow these instructions carefully. The process is similar across all 370Z models, but minor differences exist between early (2009‑2012) and later (2013‑2020) cars due to the redesigned airbox. The Nismo kit is compatible with both.

Step 1: Remove the engine cover (if present).

Most 370Z models have a plastic engine cover held by four or five bolts (8 mm socket) or snap‑in clips. Use a socket or flathead screwdriver to gently pry clips if needed. Lift the cover straight up and set it aside. Do not force it; some covers have integrated seals that can tear.

Step 2: Disconnect the mass airflow (MAF) sensor connector.

Locate the MAF sensor on the stock intake tube near the airbox. Press the tab and pull the connector straight out. Be careful not to damage the pins or wires. Tuck the connector out of the way.

Step 3: Remove the stock intake system.

The stock setup consists of an airbox, a paper filter, and two plastic tubes that connect the airbox to the throttle body and the resonator chamber. Use a flathead screwdriver to loosen the two spring clamps on the main intake tube. Slide the tube off the throttle body and the airbox. Detach the resonator tube (the smaller branch) by loosening its clamp and pulling it free. Remove the entire airbox assembly by unclipping the two retaining clips on the bottom. Lift the airbox out, noting the rubber grommets and any foam seals – you will discard most of them.

Tip: The stock air filter may be covered in loose dust. Use a shop towel to wipe out the inside of the intake tract to prevent debris from entering the engine.

Step 4: Prepare the Nismo intake components.

Unbox the Nismo kit. You will find a high‑flow cotton filter, a polished intake tube (often with a heat‑resistant coating), a heat shield, silicone couplers, clamps, a mounting bracket, and hardware. Lay everything out on a clean surface and identify each part. Check the instruction sheet for any model‑year‑specific variations.

Step 5: Install the heat shield.

Position the heat shield in the area where the airbox formerly sat. Most Nismo kits include a bracket that bolts to an existing hole on the engine block or frame rail. Use a 10 mm socket to fasten the shield securely. The shield should sit close to the radiator shroud to block hot air from the engine side.

Step 6: Install the new air filter onto the intake tube.

Slide the silicone coupler onto the intake tube’s filter end, then attach the cotton filter. Tighten the clamp just enough to hold the filter in place without compressing the filter flange. Ensure the filter sits squarely.

Step 7: Mount the intake tube to the throttle body.

Slide the other silicone coupler over the throttle body opening. Apply a small amount of engine‑safe silicone lubricant (optional) to ease installation. Push the intake tube onto the throttle body, making sure it is fully seated. Then slide the coupler over the joint and tighten both clamps to 3‑4 lb‑ft (hand‑tight plus a quarter turn). Do not overtighten, as the silicone can distort and cause a vacuum leak.

Step 8: Connect the MAF sensor to the new intake.

The Nismo tube has a MAF sensor mounting port. Transfer the MAF sensor from the old intake tube by removing two Phillips screws, then install it into the new tube with the supplied screws. Orient the sensor so that the arrow (if present) points in the direction of airflow (toward the engine). Reconnect the electrical connector and press firmly until you hear a click.

Step 9: Secure the intake tube and heat shield connections.

Double‑check all clamps and brackets. The intake tube should be free of contact with anything – hood, inner fender, or engine components. Vibration can cause premature wear. Use zip ties (not included but recommended) to secure any loose wiring harnesses that might rub against the tube.

Step 10: Reconnect the battery and install the engine cover.

Reattach the negative battery terminal and tighten it to 8‑10 lb‑ft. If you removed an engine cover, reinstall it now. Some owners choose to leave it off for easier access, but it helps reduce noise and protects the engine from dirt.

Post‑Installation Checks and Testing

Before you start the engine, visually inspect everything again. Tighten any loose clamps, ensure the MAF connector is locked, and confirm there are no gaps in the intake path.

First Start

Turn the ignition to the “ON” position without starting the engine. Let the fuel pump prime for 2‑3 seconds. Then start the engine. It may idle slightly higher than normal for the first 20 seconds as the ECU adapts. Let the engine idle for 2‑3 minutes, then rev it gently to 2,500‑3,000 rpm. Listen for any whistling or sucking sounds that indicate an air leak. If you hear a steady hiss, shut off the engine and recheck the clamps.

Test Drive

Take the car for a cautious test drive. Accelerate through all gear ranges, but avoid full‑throttle runs for the first 50 miles to allow the ECU to fully learn the new airflow. Noticeable improvements include smoother acceleration, a more responsive pedal, and a deeper exhaust note. The 15‑horsepower gain is most apparent in the mid‑range (3,500‑6,000 rpm).

Maintenance and Long‑Term Care

The Nismo cotton filter is reusable. Clean it every 10,000‑15,000 miles or after driving in dusty conditions. Use a dedicated cotton filter cleaning kit – never use soap or solvents that can damage the oiled media. Re‑oil the filter lightly; excess oil can contaminate the MAF sensor. Inspect the silicone couplers for cracking every year. Check the heat shield mounting bolts for tightness after the first 500 miles.

Common Mistakes to Avoid

  • Forgetting to disconnect the battery – the stored MAF calibration may cause rough idle until the ECU resets.
  • Overtightening clamps – this can crack the silicone couplers or distort the throttle body inlet.
  • Misaligning the MAF sensor – an incorrect orientation can cause incorrect air/fuel mixture and a check‑engine light.
  • Leaving old airbox debris in the intake tract – any loose dirt can be sucked into the engine.
  • Neglecting to secure the heat shield – a loose shield can rattle and eventually break the filter attachment.

Frequently Asked Questions

Will the Nismo intake cause a check‑engine light?

No, if installed correctly. The Nismo intake is designed to work with the factory ECU calibration. However, if you previously had a different aftermarket system, you may need to clear any stored codes.

Do I need a tune?

No – the 15 hp gain is achievable without a tune. A professional ECU tune can extract an additional 5‑8 horsepower from the same intake by optimizing timing and fuel curves.

What about warranty?

Nismo parts are genuine Nissan performance components, so installation by a dealer or yourself does not void the bumper‑to‑bumper warranty as long as you use the correct kit and follow instructions. Keep all receipts.

Can I install this on a Nissan 350Z or Infiniti G37?

No – the Nismo intake is specifically designed for the VQ37VHR engine in the 370Z, G37, and Q50/Q60. It will not fit earlier VQ35 motors without significant modification.

Performance Results and Expected Gains

Independent dyno tests show a 12‑16 hp increase at the wheels on a stock 332‑hp 370Z. Torque increases by 10‑12 lb‑ft in the mid‑range. Intake air temperature drops by 10‑15°F compared to the factory airbox, especially during stop‑and‑go driving. The intake sound becomes noticeably more aggressive, particularly between 4,000 and 7,000 rpm – many enthusiasts describe it as a “growl” that matches the car’s sporty character.

For further reading, check out Nismo’s official product page for specifications, the 370Z Forum for owner reviews, and a dyno comparison from Racing Line (hypothetical example – replace with actual source).

By following this guide, you have not only gained 15 reliable horsepower but also improved engine longevity through cooler, cleaner induction. The Nismo intake is a proven upgrade that transforms the 370Z’s personality without sacrificing daily drivability.