Turbocharger GT45 T4 V-Band 1.05 A/R 88MM - High Flow 600+ HPS

In this review the Turbocharger GT45 T4 V-Band 1.05 A/R 88MM is evaluated as a universal, high-flow turbo aimed at serious engine builds. The bottom line: it is best for builders running 4.0L to 6.0L engines who need a compressor and turbine large enough to support over 600+ BHP without a wastegate. The reviewer found the unit to be substantial in physical build, with a matte finish, wet float bearing and oil cooling that suit sustained, high-load use; some vehicle-specific modification is often required because this is a universal-fit turbo.

Key Features

• Universal Fitment: Designed to suit most 4.0L-6.0L engines, offering flexibility for custom turbo installations and swaps.
• High Power Capability: The GT45 compressor and turbine sizing is intended to support boost up to 600+ BHP, making it suitable for high-performance builds.
• Oil Cooled Wet Float Bearing: Wet float bearing and oil cooling deliver durability under sustained high RPM and boost, helping protect the rotating assembly.
• T4 Twin Scroll Inlet: The T4 twin scroll exhaust inlet improves exhaust pulse separation and scavenging when matched to an appropriate manifold.
• V-Band Exhaust Outlet: V-band flange outlet (ID 82mm, OD 101mm) provides a secure, serviceable connection for exhaust plumbing and downstream components.
• Full Accessory Kit: Ships with the accessories shown in the product images so basic plumbing and mounting can be completed without sourcing separate parts.

Who It's For

The GT45 suits experienced enthusiasts and engine builders who are planning high-horsepower turbo systems on 4.0L to 6.0L engines and who are comfortable fabricating or modifying manifolds, oil feed/return lines and intercooler plumbing. Its size and compressor/turbine dimensions favor stroked or larger-displacement engines aiming for big power.

This unit is not ideal for bolt-on upgrades on tightly packaged, stock engine bays where space, heat management, or emissions hardware prevent modifications. Street users seeking mild gains or those who need a plug-and-play solution with vehicle-specific fitment should look at smaller, application-specific turbos.

Pros & Cons

Pros

• Large compressor and turbine capacity for builds targeting 600+ BHP.
• Wet float bearing with oil cooling for better thermal endurance under heavy use.
• Serviceable V-band exhaust outlet and twin-scroll T4 inlet for effective exhaust routing.
• Includes accessories shown, reducing initial parts sourcing.

Cons

• Universal fitment means modifications are often required for vehicle-specific installation.
• No internal wastegate; external wastegate plumbing or boost control is needed for precise boost management.

Specifications

Exhaust Inlet Flange	T4 twin scroll flange
Exhaust Outlet Flange	V-band flange (ID 82mm, OD 101mm)
Bearing Type	Wet float
Cooling Type	Oil cooled
Oil Inlet / Outlet	Inlet: M9 & 2 x M8 x 1.25, Outlet: M19 & 2 x M8 x 1.25
Compressor Inducer / Exducer	69 mm inducer / 98 mm exducer
Compressor A/R	0.6 (trim 49.6)

Our Verdict

The GT45 T4 V-band 1.05 A/R 88MM is a strong choice for dedicated high-power projects on 4.0L to 6.0L engines where top-end flow and durability matter. It delivers the hardware to reach 600+ BHP and is well suited to custom installations, though it requires experienced installation and external boost control. For builders who need a high-flow, serviceable turbo and plan to adapt oil lines and flanges, it represents good value.

Frequently Asked Questions

Will this turbo fit my 4.0L engine?
It is a universal-fit GT45 sized for 4.0L-6.0L engines, but some manifold or plumbing modifications are likely depending on the vehicle.

Does it include a wastegate?
No internal wastegate is fitted; external boost control and wastegate plumbing are required for controlled boost management.

What oil connections are required?
The turbo uses an oil inlet M9 plus two M8x1.25 ports and an oil outlet M19 plus two M8x1.25 ports and must be plumbed to a suitable oil supply and return.