The Cometic Gaskets C5783-051 is a precision-engineered multi-layer steel (MLS) cylinder head gasket designed specifically for the Porsche 928 models produced between 1989 and 1991. With a bore diameter of 104mm, this gasket is tailored for the left-hand side of the engine, ensuring a perfect fit and optimal sealing performance.
When installing the C5783-051 gasket, ensure that the mating surfaces are clean and free of debris. Proper torque specifications should be followed to prevent gasket failure and ensure a reliable seal under high pressure and temperature conditions. This gasket is engineered to withstand the demands of high-performance applications, making it suitable for both daily drivers and modified setups.
This gasket is confirmed to fit the following Porsche models:
For those working on engine rebuilds or upgrades for the Porsche 928, the Cometic Gaskets C5783-051 provides a robust solution for achieving a reliable seal, contributing to the overall performance and longevity of your engine.
⚠ WARNING:
Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov
| Vehicle Make/Model | Year | Trims |
|---|---|---|
| Porsche 928 | 1985-1986 | S |
| Porsche 928 | 1987-1989 | S4 |
| Porsche 928 | 1990-1991 | GT |
| Porsche 928 | 1990-1991 | Base |
| Porsche 928 | 1993-1995 | GTS |

Cometic is a company known for manufacturing gaskets and engine seals for different engines. They cater to various industries such as the marine, industrial, agricultural, and automotive sectors. The company was established back in 1989 and has since provided high performance sealing solutions worldwide.
Motorsport ParticipationThe company is considered as the leading supplier when it comes to gaskets and seals worldwide. They have provided high-performance gaskets in various racing events such as NASCAR, GNCC, and AMA. They helped top racing teams compete at the highest level by improving engine reliability.
Built for Extreme PerformanceWhether you are into endurance races at more than 220mph or setting the fastest drag records in 2000 hp top fuel race cars, Cometic has the right product for you. They design their products to withstand extreme temperatures and pressures. Hence, they are the brand chosen by the best in motorsports.
Best Value of ProductCometic has always been dedicated to providing high-quality products that provide customer satisfaction. They have always given their customers the best product at the most competitive price.
Quality in Every ProductThe company is housed in a 70,000 square foot facility with state-of-the-art manufacturing equipment that helps them create products that are superior compared to its competitors. Using premium materials, they are able to develop gaskets that provide proper seals every time.
Purchase Cometic Products at Vivid RacingIf you are in search of a high-quality gasket for your engine, then Cometic is the brand for you. Designed for OEM or high-performance applications, Cometic has got you covered. To know more about them, visit Vivid Racing and check out their list of products that fit your needs.