• Cold Air Intake for Mazda B4000 (2001-2003) 4.0L V6 Engine - Blue
  • Cold Air Intake for Mazda B4000 (2001-2003) 4.0L V6 Engine - Blue
  • Cold Air Intake for Mazda B4000 (2001-2003) 4.0L V6 Engine - Blue
  • Cold Air Intake for Mazda B4000 (2001-2003) 4.0L V6 Engine - Blue Default Title

Cold Air Intake for Mazda B4000 (2001-2003) 4.0L Engine - Blue

$84.99
$84.99
Free Shipping within USA.
  • Guaranteed Fitment
  • Performance Tested
  • Lifetime Warranty

Want it soon? Order within

I18n Error: Missing interpolation value "end_date" for "Ends on {{ end_date }}"

Tired of your Mazda B4000 feeling a bit breathless when you hit the gas, especially with a load? That sluggish feeling from the factory intake can really dull the driving experience, but there’s a straightforward fix that’ll make your truck feel much more responsive.

Performance Cold Air Intake for Mazda B4000 (4.0L V6)

From the factory, your 2001-2003 Mazda B4000’s 4.0L V6 came with an air intake system designed for quiet operation and cost-effectiveness, not peak performance. This often means a restrictive airbox, corrugated intake tubing, and internal resonators that create turbulence and choke the engine, limiting its ability to pull in the cold, dense air it craves for optimal combustion. It’s like trying to run a marathon while breathing through a straw.

This high-flow cold air intake system completely re-engineers that pathway. By replacing the stock bottlenecks with smooth, wide-diameter T-304 aluminum tubing and a high-efficiency conical air filter, we’re allowing your 4.0L V6 to breathe freely. This means a direct, streamlined shot of colder, more oxygen-rich air straight to your throttle body, resulting in a noticeable improvement in power, throttle response, and even that characteristic V6 growl when you lean into it.

Why You Need This Upgrade

  • Enhanced Torque & Pulling Power: Notice a stronger pull off the line and when climbing grades. The improved airflow helps your 4.0L V6 generate more usable torque, whether you’re hauling gear or just commuting.
  • Sharper Throttle Response: Gone is that slight hesitation. With less restriction, your engine reacts more quickly to pedal inputs, making daily driving feel more engaging and less like you’re waiting for power.
  • Measurable Horsepower Gains: Real-world testing shows these engines respond well to better airflow. You’ll feel a tangible bump in mid-range and top-end power, making highway passing or merging smoother.
  • Improved Fuel Efficiency (with careful driving): By optimizing the air-to-fuel ratio and combustion efficiency, many drivers report a slight uptick in MPG under normal driving conditions. It’s not a miracle cure, but better breathing helps.
  • Durable, Lightweight Construction: Crafted from T-304 aluminum, this intake tubing isn’t just for show. It’s built to last, resists corrosion, and helps dissipate heat more effectively than plastic, keeping intake air temps down.
  • Aggressive Engine Sound: Let’s be honest, part of the fun is hearing that V6 growl. This intake provides a deeper, more aggressive tone, especially under acceleration, without being obnoxious at cruise.

Technical Specifications

Fitment 2001-2003 Mazda B4000 (4.0L V6 Engine)
Factory Stats Stock: Approx. 207 HP / 238 lb-ft
Installation Moderate DIY / 1-2 Hours (Requires basic hand tools)

Replaces These OEM Applications

Compatible Vehicles:

  • 2001 Mazda B4000 4.0L V6
  • 2002 Mazda B4000 4.0L V6
  • 2003 Mazda B4000 4.0L V6

Upgrade Your Mazda B4000 Today

Don’t let a restrictive factory air box hold back your B4000’s 4.0L V6. Reclaim that lost power and enjoy a more responsive, exhilarating drive every time you turn the key. Shop with confidence knowing that we deliver high-quality cold air intake systems with fast shipping and expert support.

Engine Safety Rating
Difficulty 

Fitment

Make

Mazda

Engine Size
  • 4.0L

Year
  • 2001
  • 2002
  • 2003

Installation & Tools

The Wrench Time

  • Estimated Time: 45-60 Minutes
  • Difficulty: 3/10 - A straightforward driveway bolt-on, but requires a delicate touch with aging 4.0L SOHC electronics and brittle factory plastics.

Tools You Will Need

  • 10mm socket, ratchet, and 6-inch extension (For battery and factory airbox bolts)
  • 8mm socket or nut driver (For factory and aftermarket hose clamps)
  • T20 Security Torx bit (Crucial: Must have the hollow center for the MAF sensor screws)
  • 4mm Allen wrench (For the supplied aftermarket MAF hardware)
  • Flathead screwdriver (For harness clips and locking tabs)
  • Panel popper tool (To safely pry wire harness retainers from the plastic housing)
Mechanic’s Pro Tip (The "Gotcha"):
If you spend any time on the Ranger or B-Series forums, you know the 4.0L SOHC has a universal headache: the hard plastic PCV breather tube that connects the oil filler neck to the intake. After two decades of under-hood heat cycling, this tube becomes rock-hard. If you muscle it out of the rubber grommet, it will snap, leaving you stranded with a massive vacuum leak. Use a heat gun on a low setting to gently soften the rubber boot before pulling. Secondly, Ford/Mazda used Security Torx screws for the MAF sensor. Do not try to force a standard Torx or hex bit in there, or you will strip the heads.

Phase 1: Removing the Factory Part

  1. Disconnect the Battery: Always start by disconnecting the negative battery terminal using a 10mm socket. This prevents accidental shorts and resets the ECU so it can learn the new airflow parameters of your 2001-2003 Mazda B4000 4.0L.
  2. Unplug the MAF Sensor: Locate the Mass Air Flow (MAF) sensor harness on the factory airbox. Slide the red locking tab back gently with a flathead screwdriver, press the release clip, and pull the plug free. Use a panel popper to pry the harness retainer clip out of the factory plastic housing so the wire hangs free.
  3. Loosen the Throttle Body Clamp: Grab your 8mm socket and loosen the factory worm-gear clamp securing the corrugated rubber intake tube to the throttle body.
  4. Disconnect the Breather Hose: Carefully disconnect the PCV breather hose attached to the side of the factory intake tube. Twist gently and pull straight out to safely separate it from the brittle factory plastic nipple.
  5. Extract the Factory Airbox: Remove the two bolts holding the factory airbox to the fender apron using a 10mm socket and extension. Firmly pull the airbox upward to pop it out of its rubber base grommets, lifting the entire assembly and tube out of the engine bay as one unit.

Phase 2: Installing the Cold Air Intake - Blue

  1. Transfer the MAF Sensor: Carefully remove the MAF sensor from your OEM airbox using a T20 Security Torx bit. Do not touch the exposed delicate wires inside the sensor housing; even oil from your fingers can ruin it. Bolt the sensor into the new blue aluminum intake tube using the supplied aftermarket bolts and a 4mm Allen wrench.
  2. Mount the Heat Shield: Drop the new aftermarket heat shield into the empty factory airbox location, pressing the bottom pegs into the OEM rubber grommets. Secure the top mounting points to the inner fender using the provided hardware and a 10mm socket.
  3. Install the Silicone Coupler: Slide the provided silicone reducer coupler onto the 4.0L throttle body. Slip two aftermarket clamps loosely over the coupler, then tighten the throttle body side snugly with an 8mm socket.
  4. Route the Blue Intake Tube: Guide the new blue intake tube through the hole in the heat shield and push the upper end into the throttle body coupler. Align everything for proper hood clearance, then tighten the remaining clamp with your 8mm socket. Reconnect the factory PCV breather hose to the welded nipple on the new tube.
  5. Mount the Filter and Reconnect: Slide the high-flow cone filter onto the end of the intake tube inside the heat shield and lock it down by tightening the clamp with an 8mm socket. Plug the factory wire harness back into the MAF sensor and push the red locking tab closed.
  6. First Startup Protocol: Reconnect your negative battery terminal and tighten it with a 10mm socket. Start the engine, but do not touch the gas pedal for at least 20 seconds. Let the vehicle idle so the ECU can adjust its fuel trims to the increased airflow without triggering a lean code check engine light.

Disclaimer: This is a general guide provided for the 2001-2003 Mazda B4000 4.0L. Always refer to your factory service manual for exact torque specifications and safety procedures.

Warranty

All products are backed by our Limited Lifetime Warranty. We stand by our quality. [See terms]
Cold Air Intake for Mazda B4000 (2001-2003) 4.0L Engine - Blue

$84.99