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

SHIPS FROM MANUFACTURER C5331-058MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .058in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $150.72 |
SHIPS FROM MANUFACTURER C5331-060MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic BB 4.630in Bore .060 inch MLS-5 396/402/427/454 Head Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $150.72 |
SHIPS FROM MANUFACTURER C5331-062MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .062in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $150.72 |
SHIPS FROM MANUFACTURER C5331-066MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic BB 4.630in Bore .066 inch MLS-5 396/402/427/454 Head Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $150.72 |
SHIPS FROM MANUFACTURER C5331-070MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic GM Gen II / Mark IV Big Block (396 / 402 / 427) 4.630in Bore .070in MLS-5 Head Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $150.72 |
SHIPS FROM MANUFACTURER C5331-072MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .072in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $150.72 |
SHIPS FROM MANUFACTURER C5331-075MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic GM Gen II / Mark IV Big Block (396 / 402 / 427) 4.630in Bore .075in MLS-5 Head Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $150.72 |
SHIPS FROM MANUFACTURER C5331-080MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic BB 4.630in Bore .080 inch Chevy Mark IV Big Block (396 / 402 / 427) MLS Head Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $160.71 |
SHIPS FROM MANUFACTURER C5331-081MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .081in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $160.71 |
SHIPS FROM MANUFACTURER C5331-084MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .084in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $160.71 |
SHIPS FROM MANUFACTURER C5331-086MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .086in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $160.71 |
SHIPS FROM MANUFACTURER C5331-089MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .089in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $160.71 |
SHIPS FROM MANUFACTURER C5331-092MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .092in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $160.71 |
SHIPS FROM MANUFACTURER C5331-095MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .095in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $160.71 |
SHIPS FROM MANUFACTURER C5331-098MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic BB 4.630in Bore .098in Chevy Mark IV Big Block (396 / 402 / 427) MLS Head Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $160.71 |
SHIPS FROM MANUFACTURER C5331-120MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .120in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $235.73 |
SHIPS FROM MANUFACTURER C5331-140MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV Big Block V8 .140in MLS Cylinder Head Gasket - 4.630in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $235.73 |
SHIPS FROM MANUFACTURER C5432-027MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .027in MLS Cylinder Head Gasket - 4.310in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $111.56 |
SHIPS FROM MANUFACTURER C5432-030MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .030in MLS Cylinder Head Gasket - 4.310in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $111.56 |
SHIPS FROM MANUFACTURER C5432-036MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .036in MLS Cylinder Head Gasket - 4.310in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $111.56 |
SHIPS FROM MANUFACTURER C5432-040MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Brodix Chevrolet Big Duke / Brodie 109.47mm Bore .040in MLS Head Gasket 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $111.56 |
SHIPS FROM MANUFACTURER C5432-045MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .045in MLS Cylinder Head Gasket - 4.310in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $115.56 |
IN STOCK - LOW C5432-051MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .051in MLS Cylinder Head Gasket - 4.310in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic $108.96 |
SHIPS FROM MANUFACTURER C5432-056MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .056in MLS Cylinder Head Gasket - 4.310in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $141.65 |
SHIPS FROM MANUFACTURER C5432-060MLS Gaskets are comprised of multiple embossed layers of both AMP (Advanced Multi-Polymer Coating) and uncoated stainless steel... Cometic Chevrolet Mark-IV - GM Gen-V/VI Big Block V8 .060in MLS Cylinder Head Gasket - 4.310in Bore 1975-1978 GMC C25 Suburban Base / High Sierra / Sierra Classic / Sierra Grande $141.65 |