Engine Pistons/Rings
JE Pistons Subaru EJ25 Ultra Series 99.5mm Bore Dome -7cc 9.5:1 CR – Piston Set | 361330 JE Pistons
Suspension Coilovers
K-Sport GT Pro Coilover Kit Subaru STI 2005-2007 | CSB120-GT K-Sport
Suspension Coilovers
K-Sport GT Pro Coilover Kit Subaru WRX 2002-2007 / STI 2004 | CSB040-GT K-Sport
Suspension Coilovers
K-Sport Kontrol Pro Coilover Kit Subaru STI 2005-2007 | KSP-CSB120-KP K-Sport
Suspension Coilovers
K-Sport Kontrol Pro Coilover Kit Subaru WRX 2002-2007 / STI 2004 | CSB040-KP K-Sport
Suspension Coilovers
K-Sport Rally Spec AR Coilover Kit Subaru STI 2005-2007 | CSB120-AR K-Sport
Suspension Coilovers
K-Sport Rally Spec AR Coilover Kit Subaru WRX 2002-2007/STI 2004 | CSB040-AR K-Sport
Suspension Coilovers
K-Sport Rally Spec GR Gravel Coilover Kit Subaru WRX 2002-2007 / STI 2004 | CSB040-GR K-Sport
Suspension Coilovers
K-Sport Rally Spec GR Gravel Coilovers Subaru STI 2005-2007 | CSB120-GR K-Sport
Suspension Coilovers
K-Sport Road Race RR Spec Coilover Kit Subaru WRX 2002-2007 / STI 2004 | CSB040-RR K-Sport
Intake Filter Replacements
Engine Oil Filters and Adapters
Engine Covers and Caps
Kartboy EJ Alternator Cover Aluminum Subaru WRX 02-14, STI 04-21 Kartboy
Suspension End Links
Kartboy Front and Rear Endlink Combo Subaru STI 2004-2007 / Legacy GT / Outback XT 2005-2009 Kartboy
Suspension End Links
Drivetrain Bushings
Suspension Bushings
Kartboy Front Swaybar Spacers Subaru WRX / STI 2002-2021 | KB-017-WLS Kartboy
Drivetrain Bushings
Kartboy Rear Diff Outrigger Bushings – Hard Subaru WRX / STI 2002-2007 Kartboy
Suspension End Links
Kartboy Rear Drop Endlinks Subaru STI 2004-2007 / Forester XT 2004-2008 Kartboy
Drivetrain Bushings
Kartboy Shifter Bushing Combo Subaru STI 2004-2021 | KB-003-6COMB Kartboy
Drivetrain Packages
Kartboy Short Shifter and Bushing Combo Subaru STI 2004-2021 | KB-001-6COMBO Kartboy
Interior Short Shifters
Kartboy Short Throw Shifter 6MT Subaru STI 2004-2021 Kartboy
Drivetrain Mounts
KEIN 5 Speed Transmission Mount Subaru WRX 02-21 / STI 04-21 / Legacy GT 2005-2009 | KSUB003 KEIN
Drivetrain Mounts
KEIN 6 Speed Transmission Mount Subaru WRX 02-21 / STI 04-21 / Legacy GT 05-09 KEIN
Engine Compartment Misc
KEIN Alternator Relocation Bracket Kit Subaru WRX / STI 2002-2021 EJ Engines | KSUB018 KEIN
Brake Master Cylinder Brace
Suspension Braces
Kein Central Floor Brace 2002-2007 Subaru WRX / STI | KSUB034 KEIN
Suspension Braces
KEIN Fender Reinforcement Brace Subaru WRX / STI 2002-2007 KEIN
Engine Oil Control Devices
KEIN Oil Baffle Tray Subaru WRX 2002-2014 / STI 2004-2021 / Legacy GT 2005-2012 | KSUB067 KEIN
Suspension Braces
Kein Power Trunk Brace Subaru WRX / STI 2002-2007 Sedan | KSUB022 KEIN
Drivetrain Mounts
KEIN Rear Differential Mount Subaru WRX 02-07 / STI 04-07 | KSUB004 KEIN
Suspension Braces
KEIN X-Brace for Rear Seat Subaru WRX 2002-2007 / STI 2004-2007 Sedan | KSUB025 KEIN
Engine Camshafts and Gears
Kelford 264/260 AVCS Camshafts Subaru STI EJ25 2004-2007 | R-199-B Kelford Cams
Engine Camshafts and Gears
Kelford 272/268 AVCS Camshafts Subaru STI EJ25 2004-2007 | R-199-C Kelford Cams
Engine Camshafts and Gears
Kelford 282/278 AVCS Camshafts Subaru STI EJ25 2004-2007 | R-199-D Kelford Cams
Engine Camshafts and Gears
Kelford 292/288 AVCS Camshafts Subaru STI EJ25 2004-2007 | R-199-E Kelford Cams
Exhaust Headers
Killer B DIY Holy Header Rotated Turbo Subaru WRX 2002-2014 / STI 2004-2021 | HH-DIY Killer B
Turbo Inlets / Air Inlets
Killer B EJ Cast Aluminum Turbo Inlet Subaru WRX 2002-2007 / STI 2007-2021 | EJTI Killer B
Engine Water Pumps
Engine Oil Pans
Killer B High Performance Oil Pan Subaru WRX / STI EJ25 Models 2002-2021 | EJ25PAN Killer B