$5 Off Your $100 Mobile App Purchase - Get the App

$5 Off Your $100 Mobile App Purchase - Get the App

Summit Racing Gift Cards - ALWAYS the Perfect Gift!

Filters

  • In Stock
  • Make/Model
  • Part Type

    Show All

  • Brand

    Show All

  • Make/Engine
  • Price Range
  • Filter Options
  • Savings Central

Selected Filters

Filter Results by Vehicle

Loading...

Availability

  • Filters

  • Make/Model
  • Part Type

    Show All

  • Brand

    Show All

  • Make/Engine
  • Price Range
  • Filter Options
  • Savings Central

2003 Engine Kits & Rotating Assemblies

Individual Parts
Part Groups

Results 126 - 150 of 998

Cylinder Works Big Bore Cylinder Kits 422-41001K

Cylinder Works Big Bore Cylinder Kits 422-41001K

Cylinder Works Big Bore Cylinder Kits 422-41001K

Big Bore Cylinder Kit, Forged Piston, 94mm Bore, Arctic Cat, Kawasaki, Suzuki, ATV, Motorcycle, Kit

Part Number: CLW-41001-K01

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 23, 2026 if ordered today

Hot Rods Complete Bottom End Rebuild Kits CBK0116

Hot Rods Complete Bottom End Rebuild Kits CBK0116

Hot Rods Complete Bottom End Rebuild Kits CBK0116

Rebuild Kit, Complete Bottom End, Yamaha, YFM66F, YXR66F, Kit

Part Number: HRI-CBK0116

Not Yet Reviewed

Estimated Ship Date: Jan 14, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 14, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1993-2005 TRX90 SPORTRAX - NA-10090-2K

Namura Technologies Top-End Repair Kits for 1993-2005 TRX90 SPORTRAX - NA-10090-2K

Namura Technologies Top-End Repair Kits for 1993-2005 TRX90 SPORTRAX - NA-10090-2K

TOP END REPAIR KIT

Part Number: NTI-NA-10090-2K

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 23, 2026 if ordered today

Hot Rods Complete Bottom End Rebuild Kits CBK0083

Hot Rods Complete Bottom End Rebuild Kits CBK0083

Hot Rods Complete Bottom End Rebuild Kits CBK0083

Rebuild Kit, Complete Bottom End, Yamaha, Kit

Part Number: HRI-CBK0083

Not Yet Reviewed

Estimated Ship Date: Jan 14, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 14, 2026 if ordered today

Summit Racing™ Engine Rebuild Kits 08-0069

Summit Racing™ Engine Rebuild Kits 08-0069

Summit Racing™ Engine Rebuild Kits 08-0069

Engine Rebuild Kit, Hypereutectic Flat Top, Plasmamoly Rings, Stock Bore, .010 in. Under Bearings, Chevy, LS

Part Number: CMB-08-0069

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Vertex Complete Engine Rebuild Kits for 2003-2012 85 SX (17/14), 2005-2010 85 SX (19/16), 2012 85 SXS - WR101-056

Vertex Complete Engine Rebuild Kits for 2003-2012 85 SX (17/14), 2005-2010 85 SX (19/16), 2012 85 SXS - WR101-056

Vertex Complete Engine Rebuild Kits for 2003-2012 85 SX (17/14), 2005-2010 85 SX (19/16), 2012 85 SXS - WR101-056

Complete Engine Rebuild Kit, Stock Bore, Stock Stroke, KTM, Kit

Part Number: VPX-WR101-056

Not Yet Reviewed

Estimated Ship Date: Jan 19, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 19, 2026 if ordered today

Vertex Complete Engine Rebuild Kits for 2001-2004 KX100, 2003 RM100 - WR101-106

Vertex Complete Engine Rebuild Kits for 2001-2004 KX100, 2003 RM100 - WR101-106

Vertex Complete Engine Rebuild Kits for 2001-2004 KX100, 2003 RM100 - WR101-106

Complete Engine Rebuild Kit, Stock Bore, Stock Stroke, Kawasaki, Suzuki, Kit

Part Number: VPX-WR101-106

Not Yet Reviewed

Estimated Ship Date: Jan 21, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 21, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 2006-2007 OUTLAW 500, 2003-2007 PREDATOR 500 - NA-50005K

Namura Technologies Top-End Repair Kits for 2006-2007 OUTLAW 500, 2003-2007 PREDATOR 500 - NA-50005K

Namura Technologies Top-End Repair Kits for 2006-2007 OUTLAW 500, 2003-2007 PREDATOR 500 - NA-50005K

Repair Kit, Top End, 99.150mm Bore, 10.80 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50005K

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 23, 2026 if ordered today

Eagle Competition Rotating Assemblies 129364070

Eagle Competition Rotating Assemblies 129364070

Eagle Competition Rotating Assemblies 129364070

ROTATING ASSEMBLY

Part Number: ESP-129364070

Not Yet Reviewed

Estimated Ship Date: Feb 2, 2026 if ordered today

...Loading

Estimated Ship Date: Feb 2, 2026 if ordered today

Cylinder Works Standard Bore Cylinder Kits for 2002-2008 CRF450R - 422-10002K

Cylinder Works Standard Bore Cylinder Kits for 2002-2008 CRF450R - 422-10002K

Cylinder Works Standard Bore Cylinder Kits for 2002-2008 CRF450R - 422-10002K

Big Bore Cylinder Kit, Forged Piston, 96mm Bore, for use on Honda®, Motorcycle, Kit

Part Number: CLW-10002-K01

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 23, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1981-2021 PW50 - NX-40005K

Namura Technologies Top-End Repair Kits for 1981-2021 PW50 - NX-40005K

Namura Technologies Top-End Repair Kits for 1981-2021 PW50 - NX-40005K

Repair Kit, Top End, 40.000mm Bore, 6.00 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NX-40005K

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 23, 2026 if ordered today

Federal Mogul Engine Re-Ring Kits 2056378B000

Federal Mogul Engine Re-Ring Kits 2056378B000

Federal Mogul Engine Re-Ring Kits 2056378B000

Engine Re-Ring, Moly, 4 in. Bore, Standard Rod, Dodge, 360, Kit

Part Number: FEM-2056378B000

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Federal Mogul Engine Re-Ring Kits 205-6378B011

Federal Mogul Engine Re-Ring Kits 205-6378B011

Federal Mogul Engine Re-Ring Kits 205-6378B011

Engine Re-Ring, Moly, 4 in. Bore, .010 in. Rod, Dodge, 360, Kit

Part Number: FEM-205-6378B011

Not Yet Reviewed

Estimated Ship Date: Today

...Loading

Estimated Ship Date: Today

Hot Rods Complete Bottom End Rebuild Kits for 1998-2005 KX100, 2003 RM100 - CBK0052

Hot Rods Complete Bottom End Rebuild Kits for 1998-2005 KX100, 2003 RM100 - CBK0052

Hot Rods Complete Bottom End Rebuild Kits for 1998-2005 KX100, 2003 RM100 - CBK0052

BOTTOM END KIT

Part Number: HRI-CBK0052

Not Yet Reviewed

Estimated Ship Date: Jan 14, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 14, 2026 if ordered today

Vertex Top-End Piston Kits for 2002-2006 CRF450R - VTKTC22900A

Vertex Top-End Piston Kits for 2002-2006 CRF450R - VTKTC22900A

Vertex Top-End Piston Kits for 2002-2006 CRF450R - VTKTC22900A

TOP END KIT FHC WITH CAM CHAIN

Part Number: VPX-VTKTC22900A

Not Yet Reviewed

Estimated Ship Date: Jan 21, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 21, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1985-2003 KX60 - NX-20060K

Namura Technologies Top-End Repair Kits for 1985-2003 KX60 - NX-20060K

Namura Technologies Top-End Repair Kits for 1985-2003 KX60 - NX-20060K

Repair Kit, Top End, 42.950mm Bore, 8.40 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NX-20060K

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 23, 2026 if ordered today

Vertex Top-End Piston Kits for 2003-2005 200 EXC, 2006-2009 200 XC, 2006-2016 200 XC-W - VTK22926C-1

Vertex Top-End Piston Kits for 2003-2005 200 EXC, 2006-2009 200 XC, 2006-2016 200 XC-W - VTK22926C-1

Vertex Top-End Piston Kits for 2003-2005 200 EXC, 2006-2009 200 XC, 2006-2016 200 XC-W - VTK22926C-1

VERTEX TOP END PISTON KIT

Part Number: VPX-VTK22926C-1

5.0 out of 5 stars ( 1 )

Estimated Ship Date: Jan 12, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 12, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1998-2004 TRX450FE FOURTRAX FOREMAN ES, TRX450FM FOURTRAX FOREMAN S - NA-10000K

Namura Technologies Top-End Repair Kits for 1998-2004 TRX450FE FOURTRAX FOREMAN ES, TRX450FM FOURTRAX FOREMAN S - NA-10000K

Namura Technologies Top-End Repair Kits for 1998-2004 TRX450FE FOURTRAX FOREMAN ES, TRX450FM FOURTRAX FOREMAN S - NA-10000K

Repair Kit, Top End, 89.960mm Bore, 8.50 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10000K

Not Yet Reviewed

Estimated Ship Date: Jan 9, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 9, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1995-2003 TRX400FW FOREMAN 4X4 - NA-10001-2K

Namura Technologies Top-End Repair Kits for 1995-2003 TRX400FW FOREMAN 4X4 - NA-10001-2K

Namura Technologies Top-End Repair Kits for 1995-2003 TRX400FW FOREMAN 4X4 - NA-10001-2K

Repair Kit, Top End, 86.470mm Bore, 8.20 to 1 Compression Ratio, for use on Honda®, Kit

Part Number: NTI-NA-10001-2K

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 23, 2026 if ordered today

Vertex Top-End Piston Kits for 2003-2004 CR85R, CR85RB EXPERT - VTK22863B

Vertex Top-End Piston Kits for 2003-2004 CR85R, CR85RB EXPERT - VTK22863B

Vertex Top-End Piston Kits for 2003-2004 CR85R, CR85RB EXPERT - VTK22863B

VERTEX TOP END PISTON KIT

Part Number: VPX-VTK22863B

Not Yet Reviewed

Estimated Ship Date: Jan 23, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 23, 2026 if ordered today

Vertex Top-End Piston Kits for 2002-2023 RM85, 2003-2012 RM85L - VTK22877B

Vertex Top-End Piston Kits for 2002-2023 RM85, 2003-2012 RM85L - VTK22877B

Vertex Top-End Piston Kits for 2002-2023 RM85, 2003-2012 RM85L - VTK22877B

Top-End Piston Kit, Cast Aluminum, 48.000mm Bore, Suzuki, Kit

Part Number: VPX-VTK22877B

Not Yet Reviewed

...Loading

Namura Technologies Top-End Repair Kits for 2003-2009 KVF360 PRAIRIE 2X4, 2003-2012 KVF360 PRAIRIE 4X4 - NA-20036-2K

Namura Technologies Top-End Repair Kits for 2003-2009 KVF360 PRAIRIE 2X4, 2003-2012 KVF360 PRAIRIE 4X4 - NA-20036-2K

Namura Technologies Top-End Repair Kits for 2003-2009 KVF360 PRAIRIE 2X4, 2003-2012 KVF360 PRAIRIE 4X4 - NA-20036-2K

Repair Kit, Top End, 67.47mm Bore, 8.30 to 1 Compression Ratio, Kawasaki, Kit

Part Number: NTI-NA-20036-2K

Not Yet Reviewed

Estimated Ship Date: Jan 5, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 5, 2026 if ordered today

Namura Technologies Top-End Repair Kits NA-40005-2K

Namura Technologies Top-End Repair Kits NA-40005-2K

Namura Technologies Top-End Repair Kits NA-40005-2K

Repair Kit, Top End, 83.450mm Bore, 9.50 to 1 Compression Ratio, Yamaha, Kit

Part Number: NTI-NA-40005-2K

Not Yet Reviewed

Estimated Ship Date: Jan 21, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 21, 2026 if ordered today

Namura Technologies Top-End Repair Kits NA-50000K

Namura Technologies Top-End Repair Kits NA-50000K

Namura Technologies Top-End Repair Kits NA-50000K

Repair Kit, Top End, 71.96mm Bore, 6.00 to 1 Compression Ratio, Polaris, Kit

Part Number: NTI-NA-50000K

Not Yet Reviewed

Estimated Ship Date: Jan 6, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 6, 2026 if ordered today

Namura Technologies Top-End Repair Kits for 1998-2003 300 2X4, 1998-2005 300 4X4, 2004 300 4X4 MRP - NA-11001K

Namura Technologies Top-End Repair Kits for 1998-2003 300 2X4, 1998-2005 300 4X4, 2004 300 4X4 MRP - NA-11001K

Namura Technologies Top-End Repair Kits for 1998-2003 300 2X4, 1998-2005 300 4X4, 2004 300 4X4 MRP - NA-11001K

Cylinder Head TOP END REPAIR KIT TOP END REPAIR KIT

Part Number: NTI-NA-11001K

Not Yet Reviewed

Estimated Ship Date: Jan 9, 2026 if ordered today

...Loading

Estimated Ship Date: Jan 9, 2026 if ordered today

Modal Header

Call To Order

This is a custom order part. You can order this part by Contacting Us.

Summit Racing Speedcard. Synchrony Car Care.

Summit Racing Equipment SpeedCard

Jumpstart Your Next Project!

View Details|See if you Prequalify