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99917015690/1x8
Product Information
Product Information
Spark Plugs, WR7 DC+
This BOSCH spark plug set (pack of 8) is a complete ignition service solution specifically designed for the Porsche 928 V8 engine. This set contains all eight spark plugs required for a full engine replacement, ensuring balanced combustion and consistent performance across all cylinders.
PACK OF 8

Fits:
Porsche 928S / 928S2 / 928S4 / 928GT 1983 - 1991
Porsche 928 GTS 1992 - 1995 (M28.49/50)

Spark plugs play a critical role in engine operation by igniting the air-fuel mixture within the combustion chamber. Worn or incorrect plugs can lead to misfires, poor throttle response, increased fuel consumption, and hard starting. These Bosch spark plugs are engineered to deliver a strong, stable spark, promoting efficient combustion, smooth engine running, and reliable cold starts.

Manufactured to OEM specifications, Bosch spark plugs are precision-matched to the correct heat range and electrode design required by the Porsche 928. This ensures long service life, reduced fouling, and dependable performance under both normal driving and high-load conditions. Ideal for routine servicing, preventative maintenance, or full ignition system refresh on classic Porsche 928 models.

Key Functions:
•  Ignites the air-fuel mixture for efficient combustion
•  Supports smooth idle and stable engine performance
•  Improves throttle response and fuel efficiency
•  Helps prevent misfires and uneven cylinder operation

Features & Benefits
• Genuine Bosch manufacture
• Complete set of 8 spark plugs for V8 engines
• OEM-quality materials and construction
• Correct heat range for Porsche 928 applications
• Designed for durability and consistent ignition performance
• Suitable for routine servicing and engine maintenance

Related reference numbers
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