VTT-FAB Billet Velocity Stack

VTT Billet Velocity Stack (V-Stack)

3″ • 4″ • 5″ Inlet Sizes

Running an open turbo and want to straighten airflow into the compressor for maximum efficiency? The VTT Billet Velocity Stack is exactly what you need.

Backed by fluid-dynamics principles, a proper bellmouth / velocity stack smooths incoming airflow, reduces turbulence, and improves air entry into the turbocharger—or intake on naturally aspirated applications. Unlike thin, stamped alternatives, our V-Stacks are precision-machined for strength, consistency, and performance.

Each unit is CNC-machined from 6061-T6 billet aluminum and anodized for durability and corrosion resistance. Available in 3″, 4″, and 5″ inlet sizes, these stacks are designed to fit any intake tubing or turbocharger inlet of the corresponding diameter.

Design Highlights

• Precision bellmouth profile to smooth airflow before it enters the turbo or intake

• Ultra-low-profile design—only 2.5″ above the turbo inlet

• Extended outer lip allows filter attachment on applicable sizes

• Available with or without silicone coupler and clamps

• Engineered for both turbocharged and naturally aspirated applications

The 3″ and 4″ versions are designed with an extended outer diameter, allowing direct fitment of common 7″ filters such as:

• Vibrant Performance #10961

• S&B 1032

(Provided adequate clearance is available.)

Features

• True billet velocity stack — not thin stamped or welded junk

• Smooths airflow for improved compressor efficiency

• Extremely low profile for tight engine bays

• Fits turbochargers with 3″, 4″, or 5″ inlets, including PTE Sportsman covers

• 3″ and 4″ versions accept popular 7″ filters

• 100% CNC-machined 6061-T6 aluminum

• Anodized finish for long-term durability and corrosion resistance

Available Sizes

• 3″ Inlet

• 4″ Inlet

• 5″ Inlet

• Free US shipping on orders over $250.
• Free pickup at our Dallas shop, usually ready within 24 hours.
• Unused parts can be returned within 30 days. Tunes, opened electronics, merch and installed parts are final sale.
• Want it installed? Book the install at thegbmotors.com.

Full details are on our shipping and returns page.