BL5855X Billet Dual Ball Bearing Turbocharger – Up to 750HP

BL5855X Turbocharger Features & Specs

The Boost Lab BL5855X Billet Turbocharger is designed for serious performance enthusiasts demanding fast spool, broad powerband, and top-end efficiency. Capable of supporting up to 750HP, the BL5855X delivers the perfect balance of street manners and track-ready performance.

Key Features:

• Compressor Housing: Ported 4" Inlet / 2.5" Outlet

• Compressor Wheel: Point-Milled Billet 10-Blade 58mm

• Turbine Wheel: 55mm Performance Inconel – optimized for reduced backpressure and maximum flow

• Bearing Housing: Oil & Water Cooled (Dual Ball Bearing CHRA)

• Oil Feed Fitting: 7/16-24"

• Water Ports: M14 x 1.5

• Warranty: 1-Year / Unlimited Mileage

Available Turbine Housing Options:

• T3 .63 A/R w/ 3" 4-Bolt Outlet

• T3 .82 A/R w/ 3" 4-Bolt Outlet

• T3 .63 A/R w/ 3" V-Band Outlet

• T3 .82 A/R w/ 3" V-Band Outlet

• V-Band In/Out .83 A/R

Why Choose the Boost Lab BL5855X Billet Turbocharger?

Engineering for Maximum Efficiency

The BL5855X features a point-milled billet 58mm compressor wheel and a newly engineered 55mm Inconel turbine wheel, providing exceptional airflow and reduced exhaust restriction. This results in faster spool, improved transient response, and superior top-end power.

Dual Ball Bearing Durability

Built around a dual ball bearing, oil & water-cooled CHRA, the BL5855X offers outstanding reliability and high-boost capability. Water cooling is required for optimal performance and long-term bearing life under extreme conditions.

Assembled & VSR Balanced In-House

Every Boost Lab turbocharger, including the BL5855X, is VSR balanced using Turbo Technics equipment at our facility in Dade City, Florida. This ensures minimal vibration, reduced noise, extended bearing life, and maximum performance consistency.

Built by Experts, Trusted by Professionals

With over 35 years of combined turbocharger experience, the Boost Lab team designs, assembles, and tests each turbo with industry-leading precision. From street cars to dedicated race builds, our turbos are trusted by top performance tuners and engine builders worldwide.

Talk with a Boost Lab Turbo Expert

Have questions about your build or turbo selection? Speak directly with our experienced team - no automated support, just real turbo experts ready to help.

Our team can help you:

• Select the ideal turbine housing for your setup
• Confirm fitment and installation options
• Optimize supporting mods for your horsepower goals

Call or email sales@theboostlab.com to get personalized guidance for your build today.

Discover More

Explore our full lineup of Universal Performance Turbochargers - engineered to deliver unmatched quality, performance, and value across a wide range of applications.