BOOST Products Aluminum T-Pipe Adapter 2" to 3.5" w/ 1" or 1.25" Branch for Intake / Charge Pipes

Need to add a proper-size branch to an intake or charge pipe without building the whole section from scratch? This aluminum T-pipe adapter from BOOST Products gives you a clean connection for a blow-off valve, crankcase breather, idle-air hose or another large-diameter air line.

The adapter installs between compatible silicone hoses or couplers. Choose the main pipe diameter to match your intake or intercooler piping, then select either the 1" or 1.25" branch for the component you need to connect.

Fitment Information

• Custom air intake systems
• Intercooler and charge-pipe systems
• Blow-off valve connections
• Crankcase ventilation and breather hoses
• Idle-air control connections
• Turbocharged and supercharged applications

Fitment Note

This is a universal fabrication component and is not designed for one specific vehicle. The listed main-pipe and branch dimensions are outside diameters.

Match the inside diameter of your silicone hose or coupler to the outside diameter of the aluminum adapter. Confirm both connection sizes before selecting an option.

Available Sizes

• 2" main pipe (51mm) with a 1" (25mm) or 1.25" (32mm) branch
• 2.125" main pipe (54mm) with a 1" (25mm) or 1.25" (32mm) branch
• 2.36" main pipe (60mm) with a 1" (25mm) or 1.25" (32mm) branch
• 2.5" main pipe (63.5mm) with a 1" (25mm) or 1.25" (32mm) branch
• 2.75" main pipe (70mm) with a 1" (25mm) or 1.25" (32mm) branch
• 3" main pipe (76mm) with a 1" (25mm) or 1.25" (32mm) branch
• 3.5" main pipe (89mm) with a 1" (25mm) or 1.25" (32mm) branch

Specs and Features

• Aluminum T-pipe construction
• Approximately 100mm or 3.94" long
• Main-pipe diameters from 2" to 3.5"
• Choice of 1" or 1.25" branch connection
• Designed to connect with compatible silicone hoses
• Works with intake and pressurized charge-pipe systems
• Useful for blow-off valves and crankcase ventilation systems
• Multiple size combinations for custom fabrication

Common Uses

A 1" or 1.25" connection is much larger than a normal vacuum fitting, which makes this adapter useful when the added component needs real airflow. That includes blow-off-valve recirculation hoses, crankcase breathers, catch-can plumbing and larger idle-air connections.

It can also be used when building custom intercooler piping and you need a removable T-section rather than welding a branch directly into the charge pipe.

Emissions Information

This adapter does not remove or replace emissions equipment on its own. If it is used for crankcase ventilation, blow-off-valve recirculation or another emissions-related air connection, the completed system must retain the required factory functions.

Before You Buy

• Measure the outside diameter of the existing intake or charge pipe.
• Confirm whether the added component requires a 1" or 1.25" connection.
• Silicone couplers, hoses and clamps are not included.
• Confirm the available space for the approximately 100mm-long adapter.
• Mass-airflow cars may require a recirculated blow-off-valve setup to maintain proper drivability.

Pairs Well With

• BOOST Products DCV800 Oil Catch Can – Build a high-flow crankcase ventilation system using the T-pipe branch as part of the breather or catch-can plumbing.
• BOOST Products MAF Airflow Straightener – Help calm turbulent airflow in a custom intake pipe before the mass air flow sensor.
• BOOST Products Cobra Head Silicone 90° Elbow – Route the intake or intercooler piping through a tight engine bay while connecting to the aluminum T-pipe.

About BOOST Products

BOOST Products makes exhaust, intercooler, intake and fluid-system fabrication parts for custom street and motorsport builds. Its catalog includes aluminum piping, silicone hoses, clamps, intercoolers, heat protection and turbocharger accessories in a wide range of sizes.