aFe 51-81162 Magnum FORCE Stage-2 Si Cold Air Intake for 03-11 Toyota 4.0L

Vehicle Fitment

• 2003-2009 Toyota 4Runner (SR5/Limited/Sport, V6 4.0L)
• 2005-2011 Toyota Tacoma (Base/Pre Runner/X-Runner, V6 4.0L)
• 2007-2009 Toyota FJ Cruiser (Base/TRD, V6 4.0L)

Features

• aFe Magnum FORCE Stage-2 Si cold air intake engineered for enhanced airflow and throttle response
• Sealed intake housing with auxiliary air inlet for cool, dense air delivery
• Large Pro DRY S synthetic air filter - oil-free, washable & reusable
• Powder-coated aluminum top cover for heat shielding and durability
• Dyno-tuned intake tube improves air velocity and volumetric efficiency
• Improves horsepower and torque while reducing intake restriction
• Designed as a direct-fit replacement - no cutting or drilling required
• Includes all necessary hardware for straightforward installation

Specifications

• Part Number: 51-81162
• Brand: aFe Power Magnum FORCE Stage-2 Si Series
• Compatible Years: 2003-2011
• Applicable Vehicles: Toyota 4Runner, Tacoma, FJ Cruiser
• Engine: V6 4.0L gasoline
• Filter Type: Pro DRY S synthetic, washable/reusable
• Housing Material: Cross-linked polyethylene with aluminum cover
• Intake Tube Material: Roto-molded plastic
• Estimated Performance Gains: Up to +13 HP / +21 lb-ft torque (approximate)
• Airflow Improvement: Up to ~119 % over stock intake
• Emissions: Not CARB exempt - not legal for sale/use in CA, NY, ME, CO and other CARB states
• Warranty: 2-year limited aFe warranty

Included Components

• 1x Sealed intake housing with auxiliary air inlet
• 1x Dyno-tuned intake tube
• 1x Pro DRY S washable/reusable synthetic air filter
• 1x Powder-coated aluminum top cover
• 1x Silicone coupling
• 2x Stainless steel clamps
• Installation hardware kit

Product Description

The aFe 51-81162 Magnum FORCE Stage-2 Si Cold Air Intake with a Pro DRY S filter is a high-performance intake system engineered for Toyota trucks and SUVs equipped with the 4.0L V6 engine. Designed as a sealed Stage-2 system, it replaces the restrictive factory airbox and intake tube with a high-flow configuration that supplies cooler, denser air to the engine - improving throttle response, horsepower, and torque potential. The sealed housing with an auxiliary air inlet helps isolate the intake from hot engine bay air, enabling more efficient combustion and better overall engine performance.

Featuring a large, oil-free Pro DRY S synthetic air filter that is washable and reusable, this intake offers both high airflow and easy maintenance without the need for filter oiling. The powder-coated aluminum top and dyno-tuned roto-molded tube enhance airflow characteristics while resisting heat soak. With estimated gains up to approximately +13 HP and +21 lb-ft of torque and roughly ~119 % improved airflow vs. the stock design, this Magnum FORCE intake is a solid bolt-on upgrade for Toyota 4Runner, Tacoma, and FJ Cruiser owners seeking enhanced performance. Installation is straightforward with included hardware, and no cutting or drilling is required. Note that this part is not currently CARB exempt and may not be legal for sale or use in California and other states with strict emissions standards - always verify local regulations before purchase.