Collection: For WRX STi 98-08 2.25" Inlet Cover

Kinugawa Turbochargers for Subaru WRX / STI 1998–2008 (EJ20 / EJ25) — TD05 / TD06 2.25"

Complete bolt-on turbocharger upgrades for 1998–2008 Subaru Impreza WRX and WRX STI (GC8, GDA, GDB) and Forester XT SG9 (EJ20 / EJ25). All units replace the OEM TD04L WRX turbo and IHI RHF55 / VF30 / VF35 without modification. Choose from journal bearing (bush bearing) or STS Advanced dual ceramic ball bearing configurations across TD05H and TD06 platforms. Every turbo ships Schenk MBRS 110 balanced with a 1-Year Trouble-Free Warranty.

Bush Bearing Turbos — 2.25" (Journal Bearing)

• TD05H-16G 2.25" Bush Bearing — 48.3/68mm compressor; Billet 6+6 or 11+0; OEM-equivalent response for street builds.
• TD05H-18G 2.25" Bush Bearing — 50.3/68mm compressor; stronger mid-range torque upgrade.
• TD05H-16K 2.25" Bush Bearing — 49.5/68mm Billet 7+7 Point Milling / Third-Order Free Surface compressor; broader power band.
• TD05H-20G 2.25" Bush Bearing — 52.3/68mm; largest TD05H trim for built EJ builds.
• TD06SL2-20G 2.25" Bush Bearing — TD06 platform; high-flow for aggressive power targets.
• TD06H-20G 2.25" Bush Bearing — TD06H housing; suits high-boost STI builds targeting 350+ whp.

Ball Bearing Turbos — 2.25" (STS Advanced Dual Ceramic)

• TD05H-16G 2.25" Ball Bearing — 48.3/68mm; Billet 6+6 or 11+0; 9 or 10-blade STS turbine; 7cm or 8cm housing. Best Seller.
• TD05H-18G 2.25" Ball Bearing — 50.3/68mm; High-Ni alloy turbine housing; strong mid-range with faster spool.
• TD05H-16K 2.25" Ball Bearing — 49.5/68mm Billet 7+7 Point Milling; broader power band; fits 2002–2016 WRX/STI.
• TD05H-20G 2.25" Ball Bearing — 52.3/68mm; largest TD05H trim for high-power EJ builds.
• TD06SL2-20G 2.25" Ball Bearing — TD06 platform with ceramic ball bearing; maximum top-end airflow.
• TD06H-20G 2.25" Ball Bearing — TD06H housing with STS Advanced bearing; 350+ whp capable.

Complete Turbocharger Upgrades (Full Assembly)

• TD05H-16G Full Turbo — Complete turbocharger assembly; direct bolt-on for WRX/STI/Forester XT 98-08.
• TD05H-18G Full Turbo — Complete assembly with 18G compressor trim for stronger mid-range.
• TD05H-18G Ball Bearing Full Turbo — STS Advanced ball bearing complete assembly.
• TD05H-20G Ball Bearing Full Turbo — STS Advanced ball bearing; largest TD05H trim in full assembly form.

What Is Kinugawa STS Advanced Ball Bearing?

STS Advanced (Superior Turbine Strike) uses dual ceramic ball bearings to improve boost response by 10–15% over journal bearing designs, with reduced oil dependency and superior shaft dynamics for longer service life. Learn more →

Every Kinugawa Turbo Includes

• Oil supply kit, water supply & return pipe kit, return oil pipe kit
• Turbine inlet & outlet gasket, 5 × studs and nuts
• Balance Report with Anti-Counterfeit Tag — Schenk MBRS 110 certified (Germany)
• 1-Year Trouble-Free Warranty from purchase date