How to Install a Cold Air Intake on a 2012 Infiniti G37

If you've already purchased the SPELAB Cold Air Intake System for your 2012 Infiniti G37, you're just one step away from unlocking better performance and a more responsive driving experience.

While the G37's engine bay can be a bit tight, installing a cold air intake is a beginner-friendly DIY project. With a few basic tools and some patience, most owners can handle the install right at home.

In this guide, we’ll walk you through everything you need to know — from pre-installation prep, required tools, and a step-by-step installation process to post-installation checks — to make sure your G37 safely and effectively gains improved airflow and power, all without needing a custom tune.

What to Prepare Before Installing a Infinit G37 Cold Air Intake

Before diving into the install, it’s important to get fully prepared to make the process smooth and hassle-free. Even though the SPELAB Cold Air Intake Kit for the 2012 Infiniti G37 is designed for easy DIY installation, having the right tools and setup can save you time—and headaches.

Recommended Tools Checklist:

Ratchet wrench with 10mm and 12mm sockets
Phillips and flathead screwdrivers (magnetic tips are a bonus)
Needle-nose pliers or trim clip remover
WD-40 or similar lubricant for stuck bolts
Jack and jack stands (if needed to access tight areas)
Clean microfiber cloth (to wipe connections)
Your phone or camera (to take reference photos before removing stock parts)

Safety First:

Disconnect the negative battery terminal to avoid electrical shorts or sensor errors.
Make sure your car is parked on a flat, stable surface. If you lift it, always use jack stands—not just the jack.
Wear gloves and safety glasses to protect your hands and eyes.
Keep your workspace well-ventilated, especially if you’re working in a garage.

Before you start turning wrenches, open up your SPELAB cold air intake kit and check that everything is included and ready to go. Here's what you should see in the box:

What's Included in the SPELAB g37 Cold Air Intake Kit:

Two high-flow air filters (reusable, red dry-type design)
Two black-coated aluminum intake pipes, pre-bent for a perfect fit with sensor ports
Two custom-fit heat shields with mounting holes
Two silicone couplers for airtight connections
Six stainless steel clamps to secure pipes and filters
A full set of vacuum hoses (in multiple lengths)
Rubber L- and T-connectors for vacuum routing
Mounting brackets with vibration-dampening pads
Complete hardware set: bolts, nuts, washers (20+ pieces)

All components are made to fit the G37 engine bay precisely—no cutting, no splicing, and no electrical rewiring required. That’s the SPELAB difference: install-ready, performance-focused, and engineered for a clean fit and finish.

Breaking Down the SPELAB Cold Air Intake Kit for 2012 Infiniti G37

Before you jump into the actual installation, it’s a good idea to understand what each part in the SPELAB Infiniti G37 Cold Air Intake Kit does, where it goes, and why it matters. Every component plays a role in improving airflow and ensuring a secure, efficient setup in your 2012 Infiniti G37’s engine bay.

1. High-Flow Air Filters (x2)

These red dry-type filters are designed to allow a much higher volume of air to pass through compared to the stock paper filters. They're reusable and washable, meaning they’ll last for years with proper maintenance. Each filter sits at the end of the intake pipe, positioned near the bumper behind the heat shield—pulling in colder air from outside the engine bay.

2. Aluminum Intake Pipes (x2)

These black powder-coated pipes are pre-bent to fit directly into the G37’s layout. Each pipe connects from the throttle body to the air filter. They feature a built-in mount for the factory MAF (Mass Air Flow) sensor, which is crucial for the engine’s air-fuel calculations. Proper orientation here is critical to avoid CELs (Check Engine Lights).

3. Heat Shields (x2)

The powder-coated metal heat shields sit between the filters and the hot engine bay, helping isolate the intake system from radiant engine heat. This keeps intake air temperatures lower, which improves combustion and power. They also help physically support the filters and shield them from debris.

4. Silicone Couplers (x2)

These connect the aluminum pipes to the throttle body on one side and to the air filters on the other. Made from durable silicone, they allow a bit of flex while maintaining an airtight seal. This prevents air leaks that could throw off your MAF readings or cause rough idling.

5. Stainless Steel Clamps (x6)

Used to secure the couplers to both the intake pipe and filter ends. Tight, but not overtightened, clamps are essential to prevent air leaks and keep everything in place—especially under throttle.

6. Vacuum Hoses and Connectors

The kit includes various lengths of vacuum tubing, as well as rubber L- and T-connectors to help reroute the factory vacuum lines. These are important for emissions control, PCV, and sometimes EVAP systems, depending on the G37 trim.

7. Mounting Brackets and Hardware

You’ll find multiple steel brackets, rubber vibration isolators, screws, nuts, and washers in the kit. These help secure both the intake pipes and heat shields firmly to factory mounting points—no zip ties or improvising needed.

With all components clearly understood, you’ll have a much easier time identifying where each part fits during the install—and why it matters.

Step-by-Step Installation Guide for the SPELAB Cold Air Intake on a 2012 Infiniti G37

Installing the SPELAB Cold Air Intake System on your 2012 Infiniti G37 isn’t difficult, but to make sure everything works properly and safely, it’s important to follow each step carefully. The full process usually takes about 1–2 hours for a first-time DIYer with basic tools.

Step 1: Disconnect Battery & Clean the Engine Bay

Pop the hood and use a 10mm socket to disconnect the negative terminal of the battery. This protects sensitive sensors during the install.
Wipe down the throttle body area and stock intake system with a clean microfiber cloth to avoid dust getting into the engine.

Step 2: Remove the Stock Intake System

Take out the factory airbox by loosening the screws and disconnecting attached vacuum hoses and sensors. Lift the whole box out.
Remove the stock intake tubing by undoing the clamps and pulling the pipe off the throttle body.
Remove the MAF sensor from the stock pipe and set it aside carefully—you’ll need it again shortly.

Tip: If any screws or clips are stuck, apply some WD-40 and let it soak before loosening to avoid stripping threads or breaking plastic parts.

Step 3: Pre-Assemble the New Intake System

Lightly assemble the SPELAB intake pipes with the included silicone couplers and clamps. Keep everything slightly loose so you can adjust the angles later.
Carefully install the MAF sensor into the port on the new intake pipe. Make sure it’s facing the same direction as in the stock setup.
Attach the high-flow air filter to the intake pipe and loosely tighten the clamp.

Step 4: Install the Intake Into the Engine Bay

Slide the intake pipe’s throttle body end into place and tighten the clamp just enough to hold it.
Position the air filter end toward the fender area near the front bumper for cooler airflow.
Install the heat shield panels, align them with the factory mounting holes, and use the included brackets and rubber mounts to secure them in place.
Connect the vacuum hoses to the PCV and EVAP system using the included rubber L/T fittings—tight and secure connections are key.
Once everything is aligned, go back and tighten all the clamps and screws fully.

Step 5: Reconnect Battery & Do a Startup Check

Reconnect the negative battery terminal.
Double-check that everything is secure and all hoses and wires are connected.
Start the car and let it idle for 3–5 minutes. Listen for unusual sounds and check for engine lights.
If available, use an OBD2 scanner to check for any intake-related error codes (you shouldn’t see any if the MAF was installed correctly).

Success indicators: Clean engine tone, snappier throttle response, no warning lights, and stable idling.

Post-Install Checklist & Driving Performance Improvements (2012 Infiniti G37 + SPELAB CAI)

Once you've finished installing the SPELAB Cold Air Intake System on your 2012 Infiniti G37, don’t rush to hit the road just yet. A thorough final check ensures everything is tight, secure, and functioning as intended—so your first startup runs smooth and trouble-free.

Post-Installation Checklist:

Double-check all clamps—especially around the throttle body and filter connections—to make sure everything is tight and sealed with no air leaks.
Ensure vacuum hoses and fittings are secure—loose connections can cause rough idle or even trigger a Check Engine Light.
Verify the MAF sensor is installed in the correct direction—reversed orientation can throw off readings and lead to fuel efficiency or driveability issues.
Confirm that the filters are stable and not rubbing against anything—they should be fully supported within the heat shield and away from hot components.
Reconnect the battery and start the engine, letting it idle for 3–5 minutes. Listen for any abnormal noises, surging idle, or intake hiss that could indicate an issue.

If you have an OBD2 scanner, it’s a good idea to check for any intake-related fault codes. In most cases, a proper install won’t trigger any lights.

Driving Performance Improvements (Real-World Results):

After installation, you’ll notice immediate and measurable gains in how your G37 feels and responds:

Throttle response is noticeably sharper, especially in low RPMs and during acceleration from a stop.
Expect a horsepower increase of about 7% to 10%, with torque gains in the range of 6% to 8%, depending on your current mods and conditions.
The engine note becomes deeper and sportier, especially in the 3,000+ RPM range—it adds a more aggressive tone.
Revving feels smoother and lighter, especially under moderate to full throttle.
Fuel economy may slightly improve during steady cruising or light-load driving thanks to more efficient airflow.
Overall, the car feels more responsive and alive, adding more fun to daily driving without compromising reliability.

All of this is achieved without the need for an ECU tune. The SPELAB intake retains the stock MAF position and factory vacuum routing, allowing your car’s ECU to adapt naturally to the increased airflow.

SPELAB Cold Air Intake

Among all aftermarket upgrades, the SPELAB Cold Air Intake System stands out for its precise fitment, quality materials, and proven performance gains. It’s an ideal bolt-on upgrade for drivers of the Infiniti G37 or Nissan 370Z looking to increase airflow, horsepower, and overall throttle response—without the need for tuning.

Materials & Design Features:

Black powder-coated aluminum intake pipes: Sleek and durable, these pipes resist corrosion and heat better than bare metal or plastic alternatives.
Pre-machined MAF sensor mounts: Accurately placed to ensure correct sensor readings and avoid check engine lights—no wiring modifications required.
Dual intake layout: Designed to draw cooler air from outside the engine bay, reducing intake temps and improving air density.
Reusable dry high-flow filters: Easy to clean and long-lasting, saving you money over time on replacements.
Integrated heat shields and mounting brackets: Engineered to isolate the intake from engine heat and keep everything securely in place—even under spirited driving.

Compatible Applications:

This cold air intake system is fully compatible with the following 3.7L 3696cc V6 models:

2008-2013 Infiniti G37
2008-2017 Nissan 370Z

Whether you're driving a G37 coupe, sedan, or any model year 370Z, this SPELAB cold air intake kit offers a plug-and-play fit. No cutting, welding, or extra adapters required—just install and enjoy the airflow boost.

Want Even More Power?

While the SPELAB Cold Air Intake System on its own already delivers a noticeable boost in throttle response and airflow efficiency for your 2012 Infiniti G37, pairing it with a few other upgrades can unlock even greater performance and engine response. Here’s how to build a well-rounded intake–exhaust–ignition system:

1. Performance Exhaust System (Cat-Back or Valvetronic)

If you’re improving how air gets into the engine, it’s equally important to improve how it exits. Upgrading to a SPELAB cat-back exhaust or valve-controlled exhaust system reduces backpressure, increases horsepower, and gives your G37 a deeper, more aggressive sound.

2. Larger Throttle Body

Pairing your cold air intake with a bigger throttle body improves airflow at higher RPMs, reducing bottlenecks between the intake and combustion chamber. This combination enhances mid-to-top-end power.

3. ECU Tune

While an ECU tune isn’t required for just an intake, it becomes highly recommended once you start combining upgrades. Tuning platforms like UpRev or EcuTek allow you to optimize fuel and ignition maps to match your new airflow setup, maximizing gains across the board.

4. High-Performance Spark Plugs & Coil Packs

Colder, denser air demands a stronger, more consistent spark. Upgrading to iridium spark plugs and performance coil packs ensures better combustion, improves throttle response, and supports higher cylinder pressures.

5. Real-Time Monitoring (IAT, Water Temp, Oil Temp)

If you’re serious about performance, installing gauges or digital monitoring tools for intake air temperature (IAT), coolant temp, and oil temp helps you keep your engine running safely—especially in hot weather or on track days.

FAQ

Q1: Will a cold air intake affect engine longevity?

A: Not at all. As long as you're using a well-built kit like SPELAB's and keeping the filter clean, your engine will benefit from cooler, denser air. This can even improve combustion and thermal efficiency. Just avoid driving through deep water, which can be risky for any intake system.

Q2: Is it safe to drive in the rain with this intake system?

A: Yes. The filter is positioned behind the bumper or in the upper engine bay—not low enough to suck in rainwater during normal driving. Just steer clear of deep floods (over half the tire height) to avoid hydrolocking.

Q3: Does this system increase maintenance costs?

A: Not really. The included dry filters are washable and reusable, so you won’t need to keep buying replacements. Long-term, it actually saves money compared to replacing OEM paper filters.

Q4: Will a cold air intake affect resale value?

A: Not negatively. In fact, many enthusiasts see it as a bonus. Plus, SPELAB's system is fully reversible—no cutting or wiring—so you can return to stock condition easily before resale.

Q5: What long-term maintenance should I plan for?

A: Clean the filter every 6,000 km or with each oil change, depending on your environment. Also check clamps for tightness, inspect vacuum hoses for wear, and confirm the heat shield hasn’t shifted. Keeping everything sealed and clean is key to long-term performance.

Q6: Can this intake be used with a turbo setup later?

A: This kit is designed for naturally aspirated VQ37VHR engines. If you’re planning a turbo or supercharger build in the future, we recommend upgrading to a forced induction-specific intake solution.