1978 - PowerSports Filter Options - Free Shipping on Orders Over $109 at Summit Racing

NGK Standard Series Spark Plugs D7EA

Spark Plug, Standard, 12mm Thread, .750 Reach, 18mm Hex, Gasket Seat, Non-Resistor, Each

Part Number: NGK-7912

2.67 out of 5 stars ( 3 )

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Redhorse Performance 4910 Series Thermostat Housing Assemblies 4910-302-20-2

Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.250 in. Outlet, Ford, Small Block, Each

Part Number: HSE-4910-302-202

1.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 16, 2026 if ordered today

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Estimated Ship Date: Apr 16, 2026 if ordered today

Redhorse Performance 4910 Series Thermostat Housing Assemblies 4910-460-24-1

Water Neck, Aluminum, Blue Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Ford, 426/460, Each

Part Number: HSE-4910-460-241

Not Yet Reviewed

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Mikuni RS Series Carburetors RS40-D1-K

RS SERIES CARBS 40MM

Part Number: MKU-RS40-D1-K

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

Mikuni HSR-48 Carburetor Race Kits 48-2

Valve Body, MIKUNI HSR48 RACE KIT

Part Number: MKU-48-2

Not Yet Reviewed

Estimated Ship Date: Apr 14, 2026 if ordered today

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Estimated Ship Date: Apr 14, 2026 if ordered today

Redhorse Performance 4910 Series Thermostat Housing Assemblies 4910-383-20-2

Water Neck, Aluminum, Black Anodized, O-Ring, 75 Degree, 1.250 in. Outlet, With Filler Neck for Radiator Cap, Chevy, Small/Big Block, Each

Part Number: HSE-4910-383-202

Not Yet Reviewed

Estimated Ship Date: Apr 15, 2026 if ordered today

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Estimated Ship Date: Apr 15, 2026 if ordered today

MotoRad STAT LOK Thermostat Gaskets and Seals MG40EA

Gasket, Water Neck Gasket, Paper, Chevy, Dodge, GMC, Plymouth, Each

Part Number: SNN-MG40EA

Not Yet Reviewed

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Wiseco Professional Series Pistons K0006B110

Wiseco Professional Series Pistons K0006B110

Pistons, Forged, Q16, Dome, 4.610 in. Bore, .043 in., .043 in., 3.0 mm. Ring Grooves, Chevy, Big Block, With Power Adder, Set of 8

Part Number: WIS-K0006B110

Not Yet Reviewed

Estimated Ship Date: Apr 22, 2026 if ordered today

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Estimated Ship Date: Apr 22, 2026 if ordered today

Progressive Suspension 412 Series Shocks 412-4207C

Shocks, Adjustable, Steel, Chrome, 12.500 in. Length, for use on Honda®, Kawasaki, Suzuki, Yamaha, Pair

Part Number: PGR-412-4207C

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Progressive Suspension 412 Series Shocks 412-4049B

Motorcycle Shocks, 412 Series, 90/130 lb./in. Spring Rate, 12.000 in. Length, Eyelet Ends, Black, Pair

Part Number: PGR-412-4049B

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

Redhorse Performance 4910 Series Thermostat Housing Assemblies 4910-302-24-1

Water Neck, Aluminum, Blue Anodized, O-Ring, 75 Degree, 1.500 in. Outlet, Ford, Small Block, Each

Part Number: HSE-4910-302-241

4.0 out of 5 stars ( 1 )

Estimated Ship Date: Apr 16, 2026 if ordered today

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Estimated Ship Date: Apr 16, 2026 if ordered today

Autolite XP Xtreme Performance Spark Plugs XS4164

Spark Plug, XP Xtreme Performance, Iridium, 12mm Thread, 0.750 in. Reach, Gasket Seat, 11/16 in. Wrench Size, Each

Part Number: ATL-XS4164

Not Yet Reviewed

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Dynatek 2000 Digital HD2 Ignition Systems DD2000-HD2EP

Ignition System, 2000 HD2, Capacitive Discharge, Digital, Harley-Davidson®, Each

Part Number: DYT-DD2000-HD2EP

Not Yet Reviewed

Estimated Ship Date: Apr 10, 2026 if ordered today

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Estimated Ship Date: Apr 10, 2026 if ordered today

MotoRad Thermostats 300-195

Thermostat, 195 Degrees F, Stainless Steel, Each

Part Number: SNN-300-195

Not Yet Reviewed

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E3 Spark Plugs E3.36

Spark Plug, E3, Gasket Seat, 12mm Thread, 0.750 in. Reach, Projected Tip, Resistor, Each

Part Number: ETP-E3-36

4.78 out of 5 stars ( 9 )

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Progressive Suspension 412 Series Shocks 412-4002B

Motorcycle Shocks, 412 Series, 90/130 lb./in. Spring Rate, 13.010 in. Length, Eyelet Ends, Black, Pair

Part Number: PGR-412-4002B

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

NGK Iridium IX Spark Plugs BR7HIX

Spark Plug, Iridium IX, Gasket Seat, 14mm Thread, .500 in. Reach, Resistor, Each

Part Number: NGK-7067

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JOES Racing Products Expansion Plug Fittings 36200

Expansion Plug Fitting, Straight, Aluminum, Red, Block Connection, -8 AN Male Threads, Chevy, Small Block

Part Number: JOE-36200

Not Yet Reviewed

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Dynatek Twin Fire II Mini Coils DC6-5

Coil, Twin Fire II Mini, 3.000 Ohm Primary Resistance, Black, Each

Part Number: DYT-DC6-5

Not Yet Reviewed

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Redhorse Performance Fuel Pump Block-Off Plates 4810-350-2

Fuel Pump Block-Off Plate, Aluminum, Black Anodized, Chevy, Small Block, Each

Part Number: HSE-4810-350-2

5.0 out of 5 stars ( 1 )

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NGK Iridium IX Spark Plugs CR7HIX

Spark Plug, IX Iridium, 10mm Thread, .500 in. Reach, 5/8 in. Hex, Resistor, Each

Part Number: NGK-7544

5.0 out of 5 stars ( 1 )

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Hella High Wattage Series Halogen Light Bulbs H3 130WTB

Light Bulbs, High Wattage Series, H3 Bulb Style, Halogen, White, 3200K Color Temperature, Pair

Part Number: HLA-H3-130WTB

5.0 out of 5 stars ( 1 )

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NGK Standard Series Spark Plugs AB-8

Spark Plug, Standard Series, Gasket Seat, 18mm Thread Size, 0.472 in. Reach, Each

Part Number: NGK-7909

Not Yet Reviewed

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Progressive Suspension Heavy Duty Stock Length Fork Springs 11-1536

Fork Springs, Heavy Duty Progressive, 68/93 lbs./in., 1.260 in. Diameter, 15.75 in. Length, Pair

Part Number: PGR-11-1536

Not Yet Reviewed

Estimated Ship Date: Apr 17, 2026 if ordered today

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Estimated Ship Date: Apr 17, 2026 if ordered today

Pro-X Racing Parts Connecting Rod Kits for 1976-1979 RD400 - 03.2070

ProX Con.Rod Kit RD400 '76-79 -1A1/2T2-

Part Number: PXR-03-2070

Not Yet Reviewed

Estimated Ship Date: Apr 20, 2026 if ordered today

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Estimated Ship Date: Apr 20, 2026 if ordered today

1978 Parts and Accessories