Description
Overview:
Holley’s LS valley covers with oil fill provisions are the latest addition to our expansive lineup of LS engine dress up products.Machined from billet aluminum and featuring a modern, trussed design with an integrated oil fill neck and billet oil fill cap, these LS valley covers are the perfect upgrade for your LS engine if you are looking for a subtly custom touch.These valley covers are machined smooth on the underside, allowing for the elimination of Displacement-On-Demand (DOD), and instead features an ample gasket sealing surface and provisions for re-installing the oil pressure sensor if necessary.Each valley cover is custom machined for either LS1/LS6 (10 bolt) or LS2/LS3/LS7/LSX (11 bolt) patterns and Holley / Mr. Gasket offers all the necessary gaskets and upgraded hardware options to complete your installation.The new LS valley covers with oil fill provisions are available in three unique finishes: natural billet (clear anodized for protection), polished billet, and black anodized billet.
Features:
- Precision manufactured from billet aluminum with a modern, race inspired, trussed design
- Available for GM LS1/LS6 (10 bolt) and LS2/LS3/LS7/LSX (11 bolt) engine applications
- Features integrated oil fill neck with included billet aluminum oil fill cap (Holley P/N 241-225)
- Smooth underside allows for elimination of Displacement-On-Demand (DOD)* and offers ample gasket sealing surface
- All necessary gaskets and upgraded mounting hardware sold separately
- Available in three unique finishes: natural billet (clear anodized for protection), polished billet, and black anodized billet
Application:
| Year | Make | Model | Submodel | Engine Size |
|---|---|---|---|---|
| 1997 – 2004 | Chevrolet | Corvette | ||
| 1998 – 2002 | Chevrolet | Camaro | 350/5.7L V8 | |
| 1998 – 2002 | Pontiac | Firebird | 350/5.7L V8 | |
| 2001 – 2004 | Avanti | II | ||
| 2004 – 2005 | Cadillac | CTS | 346/5.7L V8 | |
| 2004 | Pontiac | GTO |
Specs:
| Application | LS1/LS6 |
|---|---|
| Baffle Included | No |
| Bolt Pattern | 11 |
| Brand | Holley |
| Emission Code | 4 |
| Finish | Black Anodized |
| Gaskets Included | No |
| Logo | Trussed, No Logo |
| Material | Billet Aluminum |
| Mounting Hardware Included | No |
| Oil Fill Cap Included | Yes |
| Product Type | Valley Covers |
| Style | Trussed |
| Warning | California Proposition 65 |
| Warranty | Limited 90 Day |




