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1978 GMC C25 Suburban Gasket Kits

Looking for aftermarket parts to modify or upgrade your 1978 GMC C25 Suburban with gasket kits? At Tunersports.com we carry a huge selection of the top name brand performance gasket kit parts and accessories.

Gasket Kit Parts:

Only show in-stock parts

Cometic Gasket Main Seals

SHIPS FROM MANUFACTURER C5682 Cometic Chevrolet Mark-IV Big Block V8 Rear Main Seal - 2 Piece 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $60.14 Details

Cometic Gasket Oil Pan Gaskets

SHIPS FROM MANUFACTURER C15607 Fully cured nitrile butadiene rubber binder for maximum fluid resistance... Cometic Chevy Mark-IV BB V8 .094in Fiber Oil Pan Gasket Kit 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $59.74 Details
SHIPS FROM MANUFACTURER C5294 Fully cured nitrile butadiene rubber binder for maximum fluid resistance... Cometic Chevy Gen1 Small Block V8 .094in Fiber Oil Pan Gskt Kit-Right Side Dipstick-Thick Front Seal 1977-1978 GMC C25 Suburban High Sierra $59.74 Details
SHIPS FROM MANUFACTURER C5344 Fully cured nitrile butadiene rubber binder for maximum fluid resistance... Cometic Chevrolet Mark-IV Big Block V8 .094in Fiber Oil Pan Gasket Kit - Trimmed Side Rails 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $59.74 Details
SHIPS FROM MANUFACTURER C5344-060 A chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic Chevrolet Mark-IV Big Block V8 .060in AFM Oil Pan Gasket Kit - Trimmed Side Rails 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $63.72 Details
SHIPS FROM MANUFACTURER C5344-075 A chemically blown, compounded nitrile synthetic rubber bonded to an aluminum core... Cometic Chevrolet Mark-IV Big Block V8 .075in AFM Oil Pan Gasket Kit - Trimmed Side Rails 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $54.59 Details

Cometic Gasket Street Pro Kits

IN STOCK - LOW PRO1005B Cometic Street Pro Kits are geared toward the street rider who is looking to purchase a kit with all necessary gaskets and seals needed for your rebuild.... Cometic Street Pro GM 1970-85 454ci Big Block Bottom End Gasket Kit 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $75.58 CLEARANCE VIEW PRICE IN CART Details
SHIPS FROM MANUFACTURER PRO1005T Cometic Street Pro Kits are geared toward the street rider who is looking to purchase a kit with all necessary gaskets and seals needed for your rebuild.... Cometic Street Pro GM 1970-85 454ci Big Block 4.375 Top End Gasket Kit 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $220.59 Details

Cometic Gasket Timing Cover Gaskets

SHIPS FROM MANUFACTURER C5053 Cometic Chevrolet 153 4 Cylinder Gen-3 Inline 6 Timing Cover Gasket Kit 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $47.31 Details
SHIPS FROM MANUFACTURER C5377 Cometic Chevy Mark IV Big Block V8 Timing Cover Seal Jesel Belt Drive Dual Lip Wet & Dry Sump 86622 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $93.46 Details

Cometic Gasket Top End Gasket Kit

SHIPS FROM MANUFACTURER PRO1003T-400-040 MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevy 350 Gen1 Small Block V8 Top End Gasket Kit-4.000in Bore-.040in MLS Cyl Head Gasket 1978-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $290.62 Details
SHIPS FROM MANUFACTURER PRO1003T-4020 MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevy 350 Gen1 Small Block V8 Top End Gasket Kit-4.020in Bore-.040in MLS Cyl Head Gasket 1978-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $290.62 Details
SHIPS FROM MANUFACTURER PRO1003T-4060-027 MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevy 350 Gen1 Small Block V8 Top End Gasket Kit-4.060in Bore-.027in MLS Cyl Head Gasket 1978-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $290.62 Details
SHIPS FROM MANUFACTURER PRO1003T-4060-040 MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevy 350 Gen1 Small Block V8 Top End Gasket Kit-4.060in Bore-.040in MLS Cyl Head Gasket 1978-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $290.62 Details
SHIPS FROM MANUFACTURER PRO1003T-4100-027 MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevy 350 Gen1 Small Block V8 Top End Gasket Kit-4.100in Bore-.027in MLS Cyl Head Gasket 1978-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $290.62 Details
SHIPS FROM MANUFACTURER PRO1003T-4100-040 MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevy 350 Gen1 Small Block V8 Top End Gasket Kit-4.100in Bore-.040in MLS Cyl Head Gasket 1978-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $262.38 Details
SHIPS FROM MANUFACTURER PRO1005T-4200-040 MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevy 396/402 Mark-IV Big Block V8 Top End Gskt Kit-4.200in Bore-.040in MLS Cyl Head Gskt 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $216.43 Details

Cometic Gasket Water Pump Repair Kit

SHIPS FROM MANUFACTURER C5347-018 A chemically blown, compounded, nitrile synthetic rubber bonded to an aluminum core... Cometic Chevrolet Mark-IV GM Gen-V/VI Big Block V8 .018in AFM Water Pump Mounting Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $33.03 Details
SHIPS FROM MANUFACTURER C5347-031 Fully cured nitrile butadiene rubber binder for maximum fluid resistance... Cometic Chevrolet Mark-IV GM Gen-V/VI Big Block V8 .031in Fiber Water Pump Mounting Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $36.72 Details
SHIPS FROM MANUFACTURER CP5347 Fully cured nitrile butadiene rubber binder for maximum fluid resistance... Cometic Chevy Gen-4 Big Block V8 Water Pump Mounting Gasket .031in Fiber - 20 Pack 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $56.34 Details

Edelbrock Gaskets

IN STOCK - DROPSHIPS 6998 Edelbrock Gasket Kit Front Cover Big Block Chevrolet 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $70.97 Details
OUT OF STOCK 7203 Edelbrock part #7203 Intake Gaskets for 1965-1990 & later Mark IV, Oval port 396-402-454 Big-Block Chevy allow for optimum flow and performance. Any gasket can create a seal, but a good gasket can do it with less clamping force, and for a longer period of time. The new MP-2N Micropore technology doe... Edelbrock BBC Oval Intake Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $86.78 Details
OUT OF STOCK 7208 Edelbrock part #7208 Intake Gaskets for 1965-1990, Mark IV 396-402-427-454-555, Rectangular Port 6 Bolt Flange with no crossover allow for optimum flow and performance. Any gasket can create a seal, but a good gasket can do it with less clamping force, and for a longer period of time. The new MP-2N ... Edelbrock Gasket Intake Big Block Chevy Rect Port 6-Bolt Flange 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $81.60 Details