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Choose your Engine for your 1978 GMC G25


Showing 1 - 10 of 26 products
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Dayco
  • Product Attributes:
    • Top Width: .44
    • Outside Circumference:
      • 1144.78
      • 45.07
    • Color: Black
    • Banded Belt: N
    • Standards: Sae J636, Sae J637
    • Effective Length:
      • 1130.30
      • 44.50
    • Belt Construction: Bottom Cog
    • Minimum Operating Temperature:
      • -35
      • -37.2
    • Material: Synthetic Rubber Compound
    • Maximum Operating Temperature:
      • 175
      • 79.4

This Part Fits the Following OEM/Substitute Numbers:
10019362, 10024880, 10A1130, 11365, 11A1130, 123, 13-446, 13444, 13445, 14029081, 14049250, 14072732, 14076346, 14079250, 141-0463, 141-1008, 15-445, 15-452...VIEW MORE

Additional Fitment Information:
Vehicle Block CC Position Engine CID
1978 - GMC G25 V - Fan and Alternator 8 Cyl 6.6L 400

Dayco
  • w/A.C.
  • Product Attributes:
    • Top Width: .44
    • Outside Circumference:
      • 1144.78
      • 45.07
    • Color: Black
    • Banded Belt: N
    • Standards: Sae J636, Sae J637
    • Effective Length:
      • 1130.30
      • 44.50
    • Belt Construction: Bottom Cog
    • Minimum Operating Temperature:
      • -35
      • -37.2
    • Material: Synthetic Rubber Compound
    • Maximum Operating Temperature:
      • 175
      • 79.4

Additional Fitment Information:
Vehicle Block CC Position Engine CID
1978 - GMC G25 V - Fan and Alternator 8 Cyl 5.7L 350

Dayco
  • w/o A.C.
  • Product Attributes:
    • Top Width: .44
    • Outside Circumference:
      • 1132.08
      • 44.57
    • Color: Black
    • Banded Belt: N
    • Standards: Sae J636, Sae J637
    • Effective Length:
      • 1117.60
      • 44
    • Belt Construction: Bottom Cog
    • Minimum Operating Temperature:
      • -35
      • -37.2
    • Material: Synthetic Rubber Compound
    • Maximum Operating Temperature:
      • 175
      • 79.4

This Part Fits the Following OEM/Substitute Numbers:
10038288, 11A1120, 12339359-11, 1235759, 1254814, 128790A1, 13-440, 13441, 1359114, 14003977, 14087004, 14087506, 141-1040, 141-1279, 15-440, 15-444, 151529-R2, 15440...VIEW MORE

Additional Fitment Information:
Vehicle Block CC Position Engine CID
1978 - GMC G25 V - Fan and Alternator 8 Cyl 5.7L 350

Sealed Power
  • Ductile 2nd Ring Moly Steel Top Ring Premium Ring Groove Widths: 5/64 (in) , 5/64 (in) , 3/16 (in) Standard

This Part Fits the Following OEM/Substitute Numbers:
1389176, 210-6114, 251K, 2M139, 3205941, 3549588, 3579044, 3780016, 3799438, 3839510, 3892364, 3893202, 40564, 40564CP, 474170, 6474170, 8271, E-251K...VIEW MORE

Additional Fitment Information:
Vehicle Block CC Engine CID
1978 - GMC G25 V - 8 Cyl 5.7L 350

National Bearing
  • Bearing Assembly Sealed Self-Aligning

This Part Fits the Following OEM/Substitute Numbers:
079466, 12351943, 15680264, 30-27200, 3724507, 614018, 614018SA, 614018SC, 900018, 907403, 907538, 907576, 907826, 907963, 908093, 908120, 908244, 908404...VIEW MORE

Additional Fitment Information:
Vehicle Transmission
1978 - GMC G25 Manual

Mr Gasket
  • 160 deg.; Race Only
  • High Performance Thermostat; 160 deg.; Race Only;
  • High Performance Thermostat
  • Product Attributes:
    • Temperature: 160° F
    • WARNING CA Proposition 65: Yes
    • Diameter (in.): 2.120 In.
  • Features:
    • High Performance
    • Resists Variations In Coolant
    • Brass and Copper Construction
    • Opens At Right Temperature
  • Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Additional Fitment Information:
Vehicle
1978 - GMC G25

Mr Gasket
  • 160 deg.; Race Only
  • High Performance Thermostat; 160 deg.; Race Only;
  • High Performance Thermostat
  • Product Attributes:
    • Temperature: 160° F
    • WARNING CA Proposition 65: Yes
    • Diameter (in.): 2.120 In.
  • Features:
    • High Performance
    • Resists Variations In Coolant
    • Brass and Copper Construction
    • Opens At Right Temperature
  • Mr. Gasket High Performance Thermostats are designed to resist large variations of coolant pressure at high RPM (revolutions per minute). This allows them to fully open at correct temperature consistently regardless of engine RPM. The design also provides the high flow that engines operated a higher RPM need. This thermostat also features a copper/brass construction to further resist corrosion. Mr. Gasket High Performance / High Flow Thermostats are suitable for street, drag race, or oval track applications.

Additional Fitment Information:
Vehicle
1978 - GMC G25

B&M
  • Standard SFI; Internal Balance; 168 Tooth; 10.75 in. and 11.5 in. Bolt Circle
  • Automatic Transmission Flexplate; Standard SFI; Internal Balance; 168 Tooth; 10.75 in. and 11.5 in. Bolt Circle;
  • Automatic Transmission Flexplate
  • Product Attributes:
    • NHRA Accepted: Yes
    • WARNING CA Proposition 65: No
    • IHRA Legal: Yes
    • SFI Certification Sticker: Included
    • Timing Marks: 168
    • SFI Approved: Yes
    • Crankshaft Bolt Hole Quantity: 6
    • Dual Pattern: No
    • Item Weight: 7.000 Lbs.
    • Balance: Internal
  • Features:
    • NHRA/IHRA Legal For All Classes
    • Includes SFI Certification Sticker
    • Ideal For Street Applications
    • To Extreme Duty Racing
    • To High RPM Use
  • As performance levels increase, an O.E. style flexplate just wont cut it and a stronger option is a necessity to prevent transmission and/or converter failure. B&M has you covered with our high performance SFI approved flexplate designed for 1955-1985 GM small block (internally balanced) V8 engines along with 4.3L V6 engines. Also fits 1965-up GM big block (internally balanced) V8 engines with two piece rear main seal. Features include high tensile strength steel construction to resist elongation and cracking, dual bolt pattern 10.75 or 11.5 inch converter mounting locations, 168 tooth ring gear with double-sided welds for added strength and comes with SFI 29.1 safety certification insuring the ultimate in safety and performance. The assembly is then Zinc plated and treated with a Chromate Conversion Coating for added corrosion resistance and durability. B&M SFI approved flexplates are ideal for extreme duty race applications as well as street cars, tow vehicles or other vehicles needing the added protection and toughness that B&M has been delivering since 1953.

Additional Fitment Information:
Vehicle Block CC Engine Transmission Manuf. Code CID
1978 - GMC G25 L - 6 Cyl 4.8L THM350 292

Mr Gasket
  • Single Lip; Polyacrylic
  • Rear Main Seal Gasket; Single Lip; Polyacrylic;
  • Rear Main Seal Gasket
  • Product Attributes:
    • WARNING CA Proposition 65: No
    • Engine Make/Size: Chevrolet Small Block Gen I
    • Rear Main Seal Type: Two Piece
  • Features:
    • Made From Silicone
    • Withstands Extreme Engine Oil Temps
    • Injection Molded For A Precise Fit
  • This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. Its also injection molded for a precise fit.

This Part Fits the Following OEM/Substitute Numbers:
2900

Additional Fitment Information:
Vehicle Block CC Engine CID
1978 - GMC G25 V - 8 Cyl 5.7L 350

Mr Gasket
  • Single Lip; Polyacrylic
  • Rear Main Seal Gasket; Single Lip; Polyacrylic;
  • Rear Main Seal Gasket
  • Product Attributes:
    • WARNING CA Proposition 65: No
    • Engine Make/Size: Chevrolet Small Block Gen I
    • Rear Main Seal Type: Two Piece
  • Features:
    • Made From Silicone
    • Withstands Extreme Engine Oil Temps
    • Injection Molded For A Precise Fit
  • This Mr. Gasket Rear Main Seal is made from silicone to allow the seal to handle extreme engine oil temperature. It also provides for an upgrade for that leaky rope style seal and is a direct replacement for a rubber main seal. Its also injection molded for a precise fit.

Additional Fitment Information:
Vehicle Block CC Engine CID
1978 - GMC G25 V - 8 Cyl 6.6L 400
Showing 1 - 10 of 26 products

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