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2003 Subaru Impreza Engine Components

Looking for aftermarket parts to modify or upgrade your 2003 Subaru Impreza with engine components? At Tunersports.com we carry a huge selection of the top name brand performance engine component parts and accessories for your Impreza.

Whether you have a 2003 Subaru Impreza in Outback to WRX trim we have you covered. With engine components from bearings to valves we have 331 Impreza engine component mods available. All parts have free shipping to the Continental US 48 States.

2003 Impreza Engine Component Parts:

Recently Added Subaru Impreza Aftermarket Engine Component Parts:

IN STOCK Turbo XS Hardware WS-UP-HW Turbo XS Subaru WRX/STi Up-Pipe Hardware Kit $42.26 Details
IN STOCK Radium Engineering Catch Can Kits 20-0608-FL Radium 02-21 Subaru EJ-Series Fluid Lock Turbo Dual Catch Can Kit $398.95 Details
IN STOCK - LOW Carrillo Conrods WMC -6 Cyl SCR4245-4 Carrillo Subaru EJ18/EJ20/EJ257 (WRX Sti) Pro-H 3/8 WMC Bolt Connecting Rods $1,230.60 Details
IN STOCK - LOW Wiseco Piston Sets - 4 Cyl K588M925 Wiseco Subaru WRX 4v R/Dome 8.4:1 CR 92.5 Piston Shelf Stock Kit $697.48 Details
IN STOCK - LOW Wiseco Piston Sets - 4 Cyl K599M995 Wiseco Subaru EJ25 DOHC 4v InvDme -23cc 99.5 Piston Shelf Stock Kit $683.80 Details
IN STOCK - LOW Wiseco Piston Sets - 4 Cyl K600M100 Wiseco Subaru EJ25 SOHC 4v Dish -18cc 100mm Piston Set $683.80 Details
IN STOCK Wiseco Piston Rings 9200TX Wiseco 92.0mm Ring Set w/ tabbed oil set Ring Shelf Stock $50.02 Details
IN STOCK Wiseco Piston Rings 9250TX Wiseco 92.5mm Ring Set w/ tabbed oil set Ring Shelf Stock $50.02 Details
IN STOCK Wiseco Piston Rings 9300TX Wiseco 93.0mm Ring Set w/ tabbed oil set Ring Shelf Stock $50.02 Details
IN STOCK Wiseco Piston Rings 10000VF Wiseco 100.0mm Ring Set 1.2 x 1.5 x 2.0mm Ring Shelf Stock $43.66 Details

Popular Subaru Impreza Aftermarket Engine Component Parts:

IN STOCK King Engine Bearings Performance Main Bearings MB5382XPG King Subaru EJ20/EJ22/EJ25 (For Thrust in #5 Position) (Size STD) Performance Main Bearing Set $88.63 Details
IN STOCK King Engine Bearings Main Bearings MB5382XPGSTDX King Subaru EJ20/EJ22/EJ25 (For Thrust in #5 Position) (Size STDX) Tri-Metal Perf Main Bearing Set $91.96 Details
IN STOCK ARP Head Stud Kits 260-4701 ARP Subaru WRX EJ20 & EJ25 Head Stud Kit $228.73 Details
IN STOCK GSC Power Division Valve Spring Kits 5043 GSC P-D EJ257 Beehive Valve Springs w/ Titanium Retainer Valvetrain Kit (Use factory spring seats) $399.92 Details
IN STOCK Perrin Performance Pulley Cover PSP-ENG-150RD Perrin Subaru Red Pulley Cover $84.15 Details
IN STOCK GSC Power Division Valve Spring Sets 5743 GSC P-D Subaru EJ Turbo Series Valve Spring Kit (set of 16) $282.46 Details
IN STOCK King Engine Bearings Main Bearings MB5382XPGC King Subaru EJ20 / EJ22/ EJ25 (Including Turbo) Coated Crankshaft Main Bearing Set $135.26 Details
IN STOCK Manley Performance Conrods SC H-Bm -4 Cyl 14024-4 Manley Subaru WRX / STI (EJ18/20/22/25) H Beam Connecting Rod Set $518.00 Details
IN STOCK King Engine Bearings Main Bearings MB5740XPG King Subaru EJ20/EJ22/EJ25 .005 Oversized Tri-Metal Perf Main Bearing Set $138.06 Details
IN STOCK Manley Performance Conrods TTuff I-Bm -4 Cyl 14416-4 Manley Subaru WRX / STI (EJ205/STi EJ257) Turbo Tuff Pro Series I Beam Connecting Rod Set $998.93 Details