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Vehicle Set: Click here to shop All GMC C25 parts.

GMC C25 Gasket Kits

Looking for aftermarket parts to modify or upgrade your GMC C25 with gasket kits? At Tunersports.com we carry a huge selection of the top name brand performance gasket kit parts and accessories for your C25.

Whether you have a 1975 or 1978 GMC C25 in Base to Sierra Grande trim we have you covered. We have 7 gasket kits available to mod your C25. All parts have free shipping to the Continental US 48 States.

All C25 Gasket Kit Parts:

Only show in-stock parts

Cometic Gasket Street Pro Kits

Cometic Gasket
Cometic Gasket Street Pro Kits PRO1005B
IN STOCK - LOW
PRO1005B
COMETIC StreetPro Kits cater to the budget-minded street-rodder who is looking to purchase a kit with all necessary gaskets and seals needed for their rebuild. Quality gasket materials are a priority in StreetPro kits. Kit materials include: MLS, AFM, Aramid Fiber, and Armor Clad....
Cometic Street Pro GM 1970-85 454ci Big Block Bottom End Gasket Kit
1975-1978 GMC C25 Base / High Sierra / Sierra Classic / Sierra Grande
$69.89
Details
Cometic Gasket Street Pro Kits PRO1005T
SHIPS FROM MANUFACTURER
PRO1005T
COMETIC StreetPro Kits cater to the budget-minded street-rodder who is looking to purchase a kit with all necessary gaskets and seals needed for their rebuild. Quality gasket materials are a priority in StreetPro kits. Kit materials include: MLS, AFM, Aramid Fiber, and Armor Clad....
Cometic Street Pro GM 1970-85 454ci Big Block 4.375 Top End Gasket Kit
1975-1978 GMC C25 Base / High Sierra / Sierra Classic / Sierra Grande
$210.09
Cometic Gasket Street Pro Kits PRO1040T
SHIPS FROM MANUFACTURER
PRO1040T
Cometic Street Pro 01-10 GM LS 4.8L / 5.3L / 3.840in Truck Suv Top End Gasket Kit
1975-1978 GMC C25 Base / High Sierra / Sierra Classic / Sierra Grande
$371.54

Cometic Gasket Timing Cover Gaskets

Cometic Gasket
Cometic Gasket Timing Cover Gaskets C5377
SHIPS FROM MANUFACTURER
C5377
COMETIC Front and Rear Main Crank Seals are manufactured from the best materials available and are suited for all types of environments. Each seal meets or exceeds OEM quality. For Jesel Belt Drive. Ok for wet or dry sump systems...
Cometic Chevy Mark IV Big Block V8 Timing Cover Seal Jesel Belt Drive Dual Lip Wet & Dry Sump 86622
1975-1978 GMC C25 Base / High Sierra / Sierra Classic / Sierra Grande
$87.23

Edelbrock Gaskets

Edelbrock
Edelbrock Gaskets 6998
SHIPS FROM MANUFACTURER
6998
Edelbrock replacement gaskets are made to our high standards of quality and performance. Theyre the same high quality gaskets that we supply with our intakes, heads, carbs and other components....
Edelbrock Gasket Kit Front Cover Big Block Chevrolet
1975-1978 GMC C25 Base / High Sierra / Sierra Classic / Sierra Grande
$57.41
Edelbrock Gaskets 7203
SHIPS FROM MANUFACTURER
7203
These gaskets feature Micropore MP-2N an ultra-modern environmentally safe gasket material provides excellent sealing on rough, irregular flange surfaces....
Edelbrock BBC Oval Intake Gasket
1975-1978 GMC C25 Base / High Sierra / Sierra Classic / Sierra Grande
$61.08
Edelbrock Gaskets 7208
SHIPS FROM MANUFACTURER
7208
These gaskets feature Micropore MP-2N an ultra-modern environmentally safe gasket material provides excellent sealing on rough, irregular flange surfaces....
Edelbrock Gasket Intake Big Block Chevy Rect Port 6-Bolt Flange
1975-1978 GMC C25 Base / High Sierra / Sierra Classic / Sierra Grande
$58.66