The Enginetech O307 is a rebuilder-style gasket kit for 1980-1990 Chevrolet/Cadillac/Buick/Pontiac 5.0L 307ci V8 OHV engines. The kit provides the head, intake, exhaust, timing cover, and valve cover gaskets needed for a full engine rebuild - rear main seal and valve stem seals are deliberately excluded, as rebuilders typically source these separately.
| Brand | Enginetech |
| Part Number | O307 |
| Type | Rebuilder Gasket Kit |
| Engine | 5.0L 307ci V8 OHV |
| Head Bolts | Not included - source separately |
| Rear Main Seal | Not included |
| Valve Stem Seals | Not included |
| Country of Origin | US |
| UPC | 707473098335 |
| Weight | 2 lb |
Fitment: Confirmed for 1980-1990 98, Bonneville, Brougham, Caprice, Catalina, Custom Cruiser and 14 additional applications with the 5.0L 307ci V8 OHV engine.
Important Notes:
- This is a rebuilder-style gasket kit - REAR MAIN SEAL and VALVE STEM SEALS are NOT included. Source these two items separately based on engine specification.
- Head bolts are not included in this kit - use new torque-to-yield head bolts when installing.
- Intake manifold gasket is not included in this kit - order separately if required for your application.
- Exhaust manifold gaskets for 1 9/16 x 2 1/8 end ports not included.
Quantity: Sold as one complete kit. One kit services one engine rebuild.
About Enginetech Rebuilder Gasket Kits: Enginetech rebuilder gasket kits are engineered for professional engine rebuilders and machine shops. Each kit includes the full complement of head, intake, exhaust, timing cover, oil pan, and valve cover gaskets needed for an engine rebuild - deliberately excluding rear main seals and valve stem seals, which most shops source separately based on preferred brand and application specifications. This catalog-stripped structure keeps rebuilder kit pricing aggressive for trade customers without sacrificing gasket quality or fitment accuracy. Paired with separately-sourced seals and head bolts where applicable, a rebuilder kit covers the full gasket scope for a complete engine overhaul.
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or reproductive harm.
