The Enginetech GD9972H is a 4-pack of exhaust-side hardened iron valve guides engineered as a stock replacement for 1965-1990 Chevrolet, GMC, Pontiac engine applications.
Important Notes
- Sold as a 4-pack.
- Application side: Exhaust valve position - confirm you are replacing the correct side.
- Spiral ID: internal grooves distribute oil along the valve stem for improved lubrication and longer service life.
- Hardened Iron construction: heat-treated for extended service life in high-load or performance applications.
Specifications
| Brand | Enginetech |
| Part Number | GD9972H |
| Product Type | Hardened Iron Valve Guides |
| Quantity per Pack | 4 |
| Inner Diameter | .3740" |
| Outer Diameter | .6203" |
| Length | 2.63" |
| Material | Hardened Iron |
| ID Finish | Spiral ID |
| Application Side | Exhaust |
| Country of Origin | United States |
| OEM / Aftermarket Cross References | Ertel:9972H, SB International:140-9972H, Pep Boys:C9972H, Pioneer:09972H, Qualcast:30-9972H |
Vehicle Fitment
- Years: 1965-1990
- Makes: Chevrolet, GMC, Pontiac
- Models: Acadian, B60, B6000, Bel Air, Biscayne, Blazer, Brookwood, C10, C10 Pickup, C10 Suburban, C15, C15 Suburban, C15/C1500 Pickup, C15/C1500 Suburban, C1500, C1500 Suburban, C20, C20 Pickup, C20 Suburban, C25, C25 Suburban, C25/C2500 Pickup, C25/C2500 Suburban, C2500, C2500 Suburban, and more
Valve guides are precision-machined cylindrical sleeves press-fit into the cylinder head that guide the valve stem's travel and control valve-to-seat alignment during combustion cycles. Worn guides increase stem-to-guide clearance, causing oil consumption, valve seal failure, loss of seat contact, and premature valve and seat wear. Installing new guides during a valve job restores correct stem alignment, ensures proper valve sealing, and extends the service life of the valves, seats, and stem seals that work with them.
WARNING: This product can expose you to chemicals known to the State of California to cause cancer and/or reproductive harm, including lead and nickel.
