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1975 GMC G25

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Choose your Engine for your 1975 GMC G25

6 Cyl 4.8L 8 Cyl 5.7L 8 Cyl 6.6L 8 Cyl 7.4L

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1975 GMC G25 Spark Plug 6 Cyl 4.8L NGK

NGK V-Power Spark Plug
California Emissions Gap 0.060" OE Equivalent Design
V-Power Spark Plug
Product Attributes:
- Center Electrode Design: Standard
- Center Electrode Insulator Tip Projection:
  - 0.04
  - 1.0
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Grade Type: Standard Replacement
- Service Number: Yr55
- Ground Electrode Tip Material: Nickel
- Short Style Spark Plug: No
- Skirt: No
- Center Electrode Core Material: Copper
- Part Number: Yr55
- Resistor Type: Yes
- Stock Number: 7240
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - .060
  - 1.5
- Ground Electrode Core Material: Nickel
- Material Grade: Nickel/copper
- Center Electrode Projection: Non-projected
- Seat Type: Tapered
- Ground Electrode Quantity: 1
- Insulator Material: Ceramic
- Hex Size: 5/8" (16mm)
- Reach:
  - 0.460
  - 11.2
- Center Electrode Tip Material: Nickel
- Skirt Length: 0.0
- Manufacturer Heat Range: 5
- Ground Configuration: J-gap
- Resistance: 5000.0
- Insulator Height:
  - 2.19
  - 55.5
- Thread Diameter:
  - 0.551
  - 14.0
Features:
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- NGK's OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
- RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode with V-groove provides consistent performance
NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK's V-Power spark plug increases ignitability providing quicker starts and smoother idle. NGK's legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1975 - GMC G25	L	-	6 Cyl 4.8L	292

12 In Stock

Limited-Time Offer

$8.64 USD

$10.37 USD


Brand	NGK
Part #	N127240
Condition	New
Warehouse	B

1975 GMC G25 Spark Plug 8 Cyl 7.4L NGK

NGK V-Power Spark Plug
HEI Gap 0.060" OE Equivalent Design
V-Power Spark Plug
Product Attributes:
- Center Electrode Design: Standard
- Center Electrode Insulator Tip Projection:
  - 0.04
  - 1.0
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Grade Type: Standard Replacement
- Service Number: Yr55
- Ground Electrode Tip Material: Nickel
- Short Style Spark Plug: No
- Skirt: No
- Center Electrode Core Material: Copper
- Part Number: Yr55
- Resistor Type: Yes
- Stock Number: 7240
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - .060
  - 1.5
- Ground Electrode Core Material: Nickel
- Material Grade: Nickel/copper
- Center Electrode Projection: Non-projected
- Seat Type: Tapered
- Ground Electrode Quantity: 1
- Insulator Material: Ceramic
- Hex Size: 5/8" (16mm)
- Reach:
  - 0.460
  - 11.2
- Center Electrode Tip Material: Nickel
- Skirt Length: 0.0
- Manufacturer Heat Range: 5
- Ground Configuration: J-gap
- Resistance: 5000.0
- Insulator Height:
  - 2.19
  - 55.5
- Thread Diameter:
  - 0.551
  - 14.0
Features:
- TRIVALENT METAL PLATING: Delivers superior anti-corrosion and anti-seizing properties, ensuring ease of installation and removal
- COLD-ROLLED THREADS: Prevents cross-threading and damage to cylinder heads
- SOLID COPPER CORE: 98% pure copper core offers superior heat dissipation, conductivity and ultra wide heat ranges
- NGK's OE CERAMIC TECHNOLOGY: High grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance
- RECOMMENDED USAGE: Best for vehicles with OE nickel alloy plugs, not recommended on vehicles with factory precious metal plugs
- ACTUAL OE or EQUIVALENT DESIGN: OEM quality construction nickel alloy center electrode with V-groove provides consistent performance
NGK V-Power spark plugs offer reliable performance and improved ignitability over standard nickel plugs. Engineered specifically for OE applications, the special V-cut nickel alloy center electrode and concave ground electrode of NGK's V-Power spark plug increases ignitability providing quicker starts and smoother idle. NGK's legendary high grade alumina silicate ceramic creates a stronger insulator for optimal dielectric performance. Trivalent metal plating ensures superior anti-corrosion and anti-seizing properties.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

108, 1835738T, 35, 3623, 3625, 3627, 683, 684, 685, 687, 7240, 7573, 7584, 7973, ARF2-6, ARF3-6, ARF4-6, ARF41C15...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1975 - GMC G25	V	-	8 Cyl 7.4L	454

12 In Stock

Limited-Time Offer

$8.64 USD

$10.37 USD


Brand	NGK
Part #	N127240
Condition	New
Warehouse	B

1975 GMC G25 Spark Plug 6 Cyl 4.8L Autolite

Autolite 685 Copper Spark Plug
Light Duty; Auto
Copper Spark Plug
Product Attributes:
- Center Electrode Projection: Short Projection
- Center Electrode Insulator Tip Projection:
  - 0.041
  - 1.04
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Regular
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.431
  - 10.95
- Center Electrode Tip Material: Nickel
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - 0.06
  - 1.52
- Resistance: 5000
- Insulator Height:
  - 2.274
  - 57.76
Features:
- The copper core center electrode aids in thermal control and improves resistance to fouling.
- Its specially engineered high nickel alloy center and ground electrode provides extended life.
- The high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
Autolite® Copper spark plugs are engineered to deliver quick starts and the power your vehicle or applications needs to meet performance expectations.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1975 - GMC G25	L	-	6 Cyl 4.8L	292

9 In Stock

Limited-Time Offer

$6.60 USD

$7.92 USD


Brand	Autolite
Part #	A77685
Condition	New
Warehouse	B

UPC: 009100006851

1975 GMC G25 Spark Plug 6 Cyl 4.8L Autolite

Autolite 685 Copper Spark Plug
Gap .060 (in); Auto
Copper Spark Plug
Product Attributes:
- Center Electrode Projection: Short Projection
- Center Electrode Insulator Tip Projection:
  - 0.041
  - 1.04
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Regular
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.431
  - 10.95
- Center Electrode Tip Material: Nickel
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - 0.06
  - 1.52
- Resistance: 5000
- Insulator Height:
  - 2.274
  - 57.76
Features:
- The copper core center electrode aids in thermal control and improves resistance to fouling.
- Its specially engineered high nickel alloy center and ground electrode provides extended life.
- The high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
Autolite® Copper spark plugs are engineered to deliver quick starts and the power your vehicle or applications needs to meet performance expectations.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1975 - GMC G25	L	-	6 Cyl 4.8L	292

9 In Stock

Limited-Time Offer

$6.60 USD

$7.92 USD


Brand	Autolite
Part #	A77685
Condition	New
Warehouse	B

UPC: 009100006851

1975 GMC G25 Spark Plug 6 Cyl 4.8L Autolite

Autolite 685 Copper Spark Plug
with High Energy Ignition (HEI); Auto
Copper Spark Plug
Product Attributes:
- Center Electrode Projection: Short Projection
- Center Electrode Insulator Tip Projection:
  - 0.041
  - 1.04
- Seat Type: Tapered
- Washer Included: No
- Electrical Terminal Type: Non-removable Nut
- Ground Electrode Quantity: 1
- Grade Type: Regular
- Ground Electrode Tip Material: Nickel
- Center Electrode Core Material: Copper
- Hex Type: Hex
- Resistor Type: Yes
- Insulator Material: Ceramic
- Indexed: No
- Hex Size: 5/8
- Reach:
  - 0.431
  - 10.95
- Center Electrode Tip Material: Nickel
- Ground Electrode Tip Design: Standard
- Pre-Gap Size:
  - 0.06
  - 1.52
- Resistance: 5000
- Insulator Height:
  - 2.274
  - 57.76
Features:
- The copper core center electrode aids in thermal control and improves resistance to fouling.
- Its specially engineered high nickel alloy center and ground electrode provides extended life.
- The high alumina multi-rib ceramic insulator provides thermal conductivity and superior insulation for increased strength.
- Designed with a nickel-plated shell that is corrosion resistant to provide increased durability for extended periods.
Autolite® Copper spark plugs are engineered to deliver quick starts and the power your vehicle or applications needs to meet performance expectations.
Suggested Purchase Quantity: 8
- Most jobs typically require 8 of this item.
This item must be purchased in quantities of 4

This Part Fits the Following OEM/Substitute Numbers:

108, 19157989, 41-830, 5030, 5613846, 5613857, 5613869, 5614252, 7240, 8129844, ARF2-6, ARF3-6, ARF4-6, ASF3C-6, ASF4C-6, BR6FS-15, HR9ACY+, R45TX...VIEW MORE

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1975 - GMC G25	L	-	6 Cyl 4.8L	292

9 In Stock

Limited-Time Offer

$6.60 USD

$7.92 USD


Brand	Autolite
Part #	A77685
Condition	New
Warehouse	B

UPC: 009100006851

1975 GMC G25 Engine Intake Manifold Gasket 8 Cyl 7.4L Mr Gasket

Rectangle Port Shape; Port Dimensions W-1.75 in. x H-2.50 in.; Hi-Performance Only
Intake Gasket; Rectangle Port Shape; Port Dimensions W-1.75 in. x H-2.50 in.; Hi-Performance Only;
Intake Gasket
Product Attributes:
- WARNING CA Proposition 65: No
- Port Shape: Rectangle
- Engine Make/Size: Chevrolet Big Block Mark Iv
- Package Type: Retail
- Port Size: 1.750 In. X 2.500 In.
Features:
- Forms An Airtight Leak Proof Seal
- Precision Die Cut For Excellent Seal And Fit
Mr. Gasket Performance Intake Gaskets are manufactured from cellulose/nitrile composition gasket material. This is a low density material that conforms well to irregular surfaces and has very good crush resistance at high flange pressures. They provide excellent sealing and durability as the material is designed for sealing gasoline, oils, water and coolant in applications up to 350 degrees Fahrenheit. While die-cut for an excellent fit, they can be trimmed if necessary for modified port applications. Comes complete with front & rear manifold end seals. For original equipment replacement, high performance street, drag race and oval track.

Additional Fitment Information:

Vehicle	Block	CC	Engine	CID
1975 - GMC G25	V	-	8 Cyl 7.4L	454


Brand	Mr Gasket
Part #	108
Condition	New

FREE SHIPPING on order over $100 USD shipped from same warehouse

1975 GMC G25 Engine Intake Manifold Gasket 8 Cyl 7.4L Mr Gasket

Rectangle Port Shape; Port Dimensions W-1.75 in. x H-2.50 in.; Hi-Performance Only
Intake Gasket; Rectangle Port Shape; Port Dimensions W-1.75 in. x H-2.50 in.; Hi-Performance Only;
Intake Gasket
Product Attributes:
- WARNING CA Proposition 65: No
- Port Shape: Rectangle
- Engine Make/Size: Chevrolet Big Block Mark Iv
- Package Type: Retail
- Port Size: 1.750 In. X 2.500 In.
Features:
- Forms An Airtight Leak Proof Seal
- Precision Die Cut For Excellent Seal And Fit
Mr. Gasket Performance Intake Gaskets are manufactured from cellulose/nitrile composition gasket material. This is a low density material that conforms well to irregular surfaces and has very good crush resistance at high flange pressures. They provide excellent sealing and durability as the material is designed for sealing gasoline, oils, water and coolant in applications up to 350 degrees Fahrenheit. While die-cut for an excellent fit, they can be trimmed if necessary for modified port applications. Comes complete with front & rear manifold end seals. For original equipment replacement, high performance street, drag race and oval track.