MuchBoost TD05-20G/TD06-25G hybrid turbo, Subaru Impreza WRX STI (420–480 hp)

MuchBoost TD05-20G/TD06-25G hybrid turbo, Subaru Impreza WRX STI, 420–480 hp

A bolt-on MuchBoost hybrid turbo for applications including Subaru Impreza WRX STI, Subaru Impreza WRX Turbo. This upgrade is built for TD05-20G/TD06-25G applications and retains a clean, vehicle-specific installation.

The upgraded compressor and higher-flow turbine sides provide considerably more capacity than the factory unit. The housings are precision-machined for the new internals and the complete core is balanced at high shaft speeds.

Depending on the selected version, the manufacturer rates the turbo for approximately 420–480 hp. Final output depends on engine condition, the fuel system, intake, exhaust, cooling and, above all, the ECU calibration.

An upgraded turbo always requires vehicle-specific ECU calibration.

Futurez imports MuchBoost turbochargers and works with the manufacturer in Finland. You get secure delivery from a Finnish seller, a wide choice of payment methods and help selecting the correct turbo version. Every purchase also earns F* Bonus points.

Versions and technical differences

420 hp version

This version is built for approximately 420 hp, with upgraded internals sized for this output level.

• Manufacturer-rated power potential approximately 420 hp
• Larger compressor wheel
• Larger high-flow turbine wheel
• Clipped turbine wheel helps reduce exhaust backpressure
• Reinforced journal bearing system for higher boost
• Precision-machined compressor housing and seal plate
• Precision-machined turbine housing
• Turbo core is high-speed VSR balanced
• Reinforced wastegate actuator

480 hp version

This version is built for approximately 480 hp, with upgraded internals sized for this output level.

• Manufacturer-rated power potential approximately 480 hp
• Larger high-flow turbine wheel
• Clipped turbine wheel helps reduce exhaust backpressure

Common to all versions

• Compressor and turbine wheels are balanced separately, followed by high-speed VSR balancing of the complete core
• Required gasket set is included
• Bolt-on fit in place of the original turbo

Examples of compatible vehicle applications

• Subaru Impreza WRX STI
• Subaru Impreza WRX Turbo
• Subaru Impreza WRXR8

Engine codes

EJ207, 265HP, 1994ccm, EJ20G/E, 280HP, 2500ccm, EJ257, 300HP, 2457, EJ20, 220HP, 2000ccm

Related OE and turbo numbers

VF22
VF23
VF35
VF43
VF48
VC440022
VH440022
VG440022
VF440022
VE440022
VD440022
VB440022
VD440047
VA660033
VB660033
VA660042
VC660051
VA660035
VB660035
VA660043
14411AA440
14411AA442
14411AA441
14411-AA440
14411-AA441
14411-AA442
14411-AA700
14411AA700
14411-AA620
14411AA620
14411AA142
14411AA143
14412AA132
14412AA171
14411AA172

Before ordering, check the engine code and the identification numbers on the original turbo. If you are unsure about fitment, contact us with the VIN and the old turbo numbers and we will help verify the correct version.

Tip: Ask us for the gaskets, bolts, oil lines and other installation parts at the same time. A new turbo should not be installed with a restricted oil feed or leaking gaskets.

MuchBoost turbochargers carry a 12-month manufacturer warranty covering manufacturing and material defects. The warranty does not cover failures caused by external factors such as lubrication problems, unsuitable engine calibration or installation errors.