BLOX Racing BXIM-00309 2.5" Velocity Stack Air Filter Kit Black Composite

Vehicle Fitment

Universal - compatible with any naturally aspirated or turbocharged vehicle with a 2.5" (64mm) intake tube or throttle body inlet. Confirm your intake tube diameter before ordering. Also available in 3" (BXIM-00303), 3.5" (BXIM-00311-BK), and 4" (BXIM-00310) neck sizes.

Fitment Notes

• The 2.5" (64mm) neck diameter fits directly onto a 2.5" intake tube or throttle body inlet. The included silicone coupler and clamps secure the velocity stack to the intake tubing.
• Not CARB legal - not for street use in California or other CARB-regulated states. Intended for off-road, competition, and track use where applicable.
• The dry element air filter does not require oiling. Clean with compressed air or a dry filter cleaner; re-oiling is not necessary and should not be done.
• Dyno-proven to increase horsepower and torque in BLOX Racing's own testing when replacing a restrictive factory or low-quality aftermarket filter.

Features

• BLOX Racing 2.5" Performance Air Filter Kit - a complete filter assembly combining a 2.5" composite velocity stack, 7" tall dry element high-flow air filter, and 2.5" black silicone hose coupler with clamps. Designed to replace a factory airbox assembly or function as the filter terminus for a custom short ram or cold air intake build on any 2.5" intake system.
• PA66 glass-filled nylon composite velocity stack - injection-molded from PA66 glass-filled nylon rather than aluminum, the composite construction significantly reduces heat soak compared to metal velocity stacks. Less heat transferred from the stack to the incoming charge air results in a denser, cooler air charge entering the intake system.
• Dry element air filter, 7" height - oil-free construction eliminates the risk of MAF sensor or other sensor contamination common with oiled performance filters. The tall 7" filter element provides a large surface area for high airflow capacity with low restriction at the 2.5" neck.
• Black silicone hose coupler with clamps - provides a secure, airtight connection between the velocity stack and the intake tubing. Silicone withstands underhood heat and remains flexible across a wide temperature range for long service life.
• Velocity stacks optimized for race-proven intake airflow efficiency - the bell-mouth inlet geometry reduces air turbulence at the filter-to-intake transition, increasing effective flow volume entering the intake system.
• Ideal for naturally aspirated and turbocharged applications.

Specifications

• Part Number: BXIM-00309
• Neck Diameter: 2.5" (64mm)
• Filter Height: 7"
• Velocity Stack Material: Injection-Molded PA66 Glass-Filled Nylon (Composite)
• Velocity Stack Color: Black
• Filter Type: Dry Element (oil-free)
• Silicone Coupler: 2.5", Black
• Application: Universal
• CARB Status: Not Legal for California Street Use

Included Components

• 1x BLOX Racing 2.5" Composite Velocity Stack (Black PA66 Nylon)
• 1x BLOX Racing Performance Dry Element Air Filter (7" Height)
• 1x 2.5" Black Silicone Hose Coupler
• 2x Hose Clamps

Product Description

The BLOX Racing BXIM-00309 is a 2.5" performance air filter kit combining a PA66 glass-filled nylon composite velocity stack, 7" tall dry element air filter, and 2.5" black silicone coupler with clamps. It is designed for any naturally aspirated or turbocharged vehicle running a 2.5" intake tube or throttle body inlet, replacing the factory airbox or serving as the filter assembly on a custom intake build. The composite velocity stack reduces heat soak versus aluminum alternatives, keeping incoming charge air cooler, while the dry element filter provides high-flow, oil-free filtration that is safe for MAF sensors and other air measurement devices.

The 7" filter height provides a generous filter surface area for maximum airflow capacity at the 2.5" neck diameter. BLOX Racing's dyno testing shows horsepower and torque gains over restrictive OEM and budget aftermarket filter setups. Not CARB legal - not for street use in California. Additional neck diameter options available: 3" (BXIM-00303), 3.5" (BXIM-00311-BK), and 4" (BXIM-00310).