Best Turbo For Sti: Compare Replacement and 20G Options

#1 · Best Overall

1. BuyAutoParts VF48 Turbo

• Dimensions: 13 x 11 x 10 in
• Weight: 15 lb

Best for: Later US-spec STI replacement.

Why it ranks #1: Listed as an exact-fit replacement for US-spec STI models and includes an oil line banjo bolt; its stated fitment covers the widest STI range here.

A stated exact-fit replacement for US-spec Subaru WRX STI models from 2008–2020 makes this BuyAutoParts turbo a targeted choice for owners replacing an existing unit. It includes an oil line banjo bolt and is explicitly a replacement, not an add-on for a vehicle that was not turbocharged.

The exact-fit replacement positioning is intended to simplify choosing a turbo for a listed US-spec STI, while the included oil line banjo bolt supplies a named component with the assembly. The listing identifies it as a replacement for an existing turbo and says it is not an add-on for a vehicle without one, which clarifies the installation workflow. Its stated coverage is later than the 2002–2006 applications offered by other products in this roundup.

Skip it if you need a turbo for a 2002–2006 EJ20/EJ25; maXpeedingrods YI30EX lists that earlier application.

This suits a US-spec WRX STI owner replacing an existing turbo in the listed 2008–2020 range, especially when the included oil line banjo bolt is useful. It is not an upgrade add-on for a non-turbo vehicle.

Listed on Amazon as: Turbo Turbocharger w/Oil Line Banjo Bolt For Subaru Impreza WRX STI 2008-2019 Replaces IHI VF48 – BuyAutoParts 40-30187AN New

#2 · Best Complete Kit

2. A-Premium VF48 Kit

• Weight: 14.97 lb

Best for: WRX kit with actuator and gasket.

Why it ranks #2: The VF48 kit lists STI fitment and includes a wastegate actuator and gasket, useful when replacing the turbo and specified hardware together.

An included wastegate actuator and gasket make this A-Premium complete turbo kit a bundled replacement choice for listed Subaru Impreza 2.5L applications. Its fitment spans WRX and STI models across several 2008–2014 model-year ranges, with the VF48 identified as the turbo model.

The included wastegate actuator and gasket mean buyers can evaluate this as a kit rather than a turbo-only listing, with those named pieces part of the supplied assembly. A VF48 model designation further narrows the configuration. Listed applications include WRX from 2008–2013, WRX Limited from 2010–2014, WRX Premium from 2009–2014, and STI variants from 2011–2014, so checking the specific trim and year against those ranges is central to fitment.

Skip it if you own a 2008–2020 US-spec STI; BuyAutoParts 40-30187AN lists that later replacement range.

This kit suits owners of a listed 2008–2014 Impreza 2.5L WRX or STI variant who want an actuator and gasket included. Trim-specific year coverage matters, and the listed range does not extend beyond 2014.

Listed on Amazon as: A-Premium Complete Turbo Turbocharger Kit with Wastegate Actuator & Gasket

#3 · VF39 Replacement

3. Mustrod VF39 Turbo

• Dimensions: 11.02 x 10.24 x 9.45 in
• Weight: 15.18 lb

Best for: VF39 sedan replacement shoppers.

Why it ranks #3: Its RHF55 VF39 identification and listed 2.5L STI sedan compatibility make it a targeted choice for owners matching those references.

Its RHF55 VF39 turbo model and VA440028 number identify this Mustrod unit for 2004–2007 Subaru Impreza WRX STI 2.5L sedans. The listing also names a response and smooth-acceleration goal, making it a replacement-oriented option for buyers matching that specific application.

The listed 2.5L 2458CC H4 DOHC application narrows the fitment to 2004–2007 WRX STI sedans, while the RHF55 VF39 designation and multiple VA–VE440028 numbers help identify the intended replacement family. Mustrod describes the function as improving response speed and accelerating smoothly, and also claims stable power at high altitude. Those stated goals may matter to buyers choosing a unit for the specified sedan rather than a broader range of body styles.

Skip it if you need a 2008–2013 WRX kit; A-Premium APTBC030 lists those WRX years and includes a wastegate actuator.

This is a focused match for a 2004–2007 Impreza WRX STI 2.5L sedan owner seeking the VF39/RHF55 replacement family. Its listed sedan application is the key boundary for buyers with other body styles.

Listed on Amazon as: VF39 Turbo Turbocharger VA440028 Replacement for Subaru Impreza WRX STI 2.5L 2004 2005 2006 2007#14411AA572 Mustrod

#4 · 20G Fitment Range

4. APFAITH TD05-20G Turbo

• Weight: 15.4 lb

Best for: TD05-20G configuration matchers.

Why it ranks #4: Lists EJ20/EJ25 fitment and TD05-20G, TD05H-20G, and TD05-20G-8 configurations; it also advises checking flange and line locations.

This APFAITH TD05-20G lists compatibility with TD05-20G, TD05H-20G, and TD05-20G-8 configurations for 2002–2006 Subaru Impreza WRX and STI EJ20/EJ25 models. That configuration detail helps buyers compare their existing turbo setup before selecting a replacement.

The stated direct-fit application covers 2002–2006 Impreza WRX and STI models with EJ20 or EJ25 engines, while the three named TD05 configuration variants give buyers specific models to compare. APFAITH also calls for checking flange style and oil and water line locations against the existing turbo and product images. That comparison step makes compatibility more deliberate, though it places more fitment checking on the buyer than a listing framed solely as an exact-fit replacement.

Skip it if you need a 2008–2020 US-spec STI replacement; BuyAutoParts 40-30187AN lists that later application.

This is for an early Impreza WRX or STI owner whose existing setup matches a listed TD05 configuration and line layout. Its fitment guidance makes configuration comparison an essential step before selecting it.

Listed on Amazon as: TD05-20G Turbocharger fit for Subaru Impreza WRX STI EJ20 EJ25 (2002-2006)

#5 · Stated 380 HP

5. BFO TD05-20G Turbo

• Dimensions: 10.63 x 9.06 x 11.42 in
• Weight: 15.98 lb

Best for: TD05-20G early-platform option.

Why it ranks #5: The listing specifies EJ20/EJ25 fitment and a capability of up to 380 hp, with ductile iron turbine housing and a forged-aluminum compressor wheel.

The TD05-20G designation and stated capacity of up to 380 hp give this BFO turbo a clear identity for 2002–2006 Subaru Impreza WRX and STI builds. Its listed EJ20/EJ25 coverage pairs that output target with high-temperature turbine components for owners considering an early-platform replacement.

BFO specifies a ductile-iron turbine housing resistant to 1292°F and an alloy turbine wheel rated to operate at 1652°F, useful details for buyers weighing component materials in a hot-running turbo assembly. The forged-aluminum compressor wheel adds another identified construction feature. Combined with stated EJ20/EJ25 fitment for 2002–2006 Impreza WRX and STI models and a maximum stated output of 380 hp, these details define a focused application rather than broad model-year coverage.

Skip it if you need a listed 2008–2020 US-spec STI replacement; BuyAutoParts 40-30187AN covers that later range.

Choose this for an early Impreza WRX or STI owner seeking a TD05-20G with a stated 380-hp ceiling and specified turbine materials. The stated application ends at 2006, so later-model owners need another fitment.

Listed on Amazon as: BFO Turbo Turbocharger TD05-20G for Subaru Impreza WRX STI EJ20 EJ25 2002 2003 2004 2005 2006 380HP,

#6

6. maXpeedingrods Turbo

• Dimensions: 10.63 x 9.06 x 11.42 in
• Weight: 16.49 lb

Best for: Early EJ20/EJ25 power builders.

Why it ranks #6: Lists 2002–2006 WRX/STI EJ20 and EJ25 compatibility and up to 380 hp, but gives less detail about matching a specific factory turbo model.

A stated output capacity of up to 380 hp sets this maXpeedingrods turbo apart for early Subaru Impreza WRX and STI owners seeking a higher-output replacement. Its listed fitment covers EJ20 and EJ25 engines from 2002–2006, while high-temperature turbine materials address demanding operating conditions.

The ductile-iron turbine housing is rated for resistance to 1292°F, and the alloy turbine wheel is specified to operate at 1652°F; those temperature figures speak to components intended for a hot turbo environment. A forged-aluminum compressor wheel rounds out the assembly. The stated 2002–2006 EJ20/EJ25 coverage and up-to-380-hp figure help define the application and output target, but buyers should keep both limits in view when choosing a replacement.

Skip it if you have a 2008–2019 US-spec STI; BuyAutoParts 40-30187AN lists that later application.

For an owner targeting up to 380 hp on a 2002–2006 Impreza WRX or STI with an EJ20 or EJ25, this is a defined early-platform option. Its stated fitment does not extend to later model years.

Listed on Amazon as: maXpeedingrods Turbo Turbocharger for Subaru Impreza WRX 2002-2006

#7

7. A-Premium RHF55 Kit

• Weight: 19.25 lb

Best for: Gasket-equipped RHF55 assembly.

Why it ranks #7: Includes a gasket and lists an RHF55 assembly for EJ20-family applications, but its stated fitment centers on Legacy, Outback, and WRX models.

A supplied turbo gasket is the defining practical feature of this A-Premium RHF55 assembly for listed Subaru Legacy, Outback, WRX, and STI applications from 2003–2007. The listing connects the gaskets with keeping impurities out of the compressor room and oil pipeline.

The included gaskets are described as helping prevent impurities from entering the compressor room and oil pipeline, giving buyers a maintenance-related reason to value the bundled parts. The RHF55 model and alloy material identify the assembly, while the listed EJ20, EJ20G, and EJ20E engine coverage defines its application. That combination is useful for a buyer matching an early Subaru engine and seeking a kit that arrives with gaskets, rather than a listing that names only a turbo assembly.

Skip it if you need a listed EJ25 turbo; maXpeedingrods YI30EX covers EJ20 and EJ25 Impreza applications from 2002–2006.

This fits buyers matching the listed 2003–2007 Subaru Legacy, Outback, WRX, or STI EJ20-family applications who value included gaskets. The listed engine codes are the boundary; EJ25 is not among them.

Listed on Amazon as: A-Premium RHF55 Complete Turbocharger Turbo Kit Compatible with Subaru

#8

8. SUZANNE VF48 Turbo

Best for: VF48 bolt-on replacement seekers.

Why it ranks #8: Lists STI fitment for a single configuration and several OE references, but provides less vehicle and engine fitment detail than the higher-ranked options.

Pre-balanced rotating assemblies and a stated direct bolt-on design are the key features of this SUZANNE VF48 turbocharger for the listed 2013 Impreza WRX and 2014 WRX STI. Those details target buyers seeking a replacement installation path tied to specific model years.

The listing says the unit is a direct bolt-on replacement and has pre-balanced rotating assemblies, features presented to simplify installation without describing a custom build workflow. It also names cast-iron construction and precision-machined components for high-heat, high-RPM operation. The stated fitment is narrow—2013 Impreza WRX and 2014 Impreza WRX STI—while the listed OE numbers, including VC440057-VF48 and RHF55, help identify the intended replacement family.

Skip it if you need a 2008–2013 WRX kit with a gasket; A-Premium APTBC030 includes a gasket and lists those WRX years.

This suits an owner of the listed 2013 WRX or 2014 WRX STI seeking a bolt-on VF48-family replacement with pre-balanced assemblies. Its narrowly stated model-year coverage is an important fit boundary.

Listed on Amazon as: Turbocharger VF48 For Subaru Impreza WRX 2013 2.5L Impreza WRX STI 14