Blanking Cap for Inlet Manifold. Porsche 964 Carrera / RS / 993 Carrera / RS / Turbo 1989-98  ›  93011025602

This Porsche blanking cap is used with inlet-manifold and intake-distributor assemblies fitted to selected 964 and 993 models. It provides a factory-specification closure for the applicable opening and carries Porsche reference 93011025602.

Fits

• Porsche 964 C2 / C4 / RS 1989-94
• Porsche 993 C2 / C4 / RS 1995-98
• Porsche 993 Turbo 1994–98

Check fitment for your specific vehicle (model, year, engine) before ordering.

What This Product Does

The cap closes the designated port within the intake assembly. Correct sealing helps prevent unmetered air from entering the induction system and protects the opening from dirt or other contamination.

Functions

• Closes the specified inlet-manifold or intake-distributor port
• Supports an airtight induction path when correctly installed
• Protects the covered opening from contamination
• Provides a direct replacement for a missing, loose or deteriorated cap

Technical Details

• Porsche part number: 93011025602
• Component type: rubber closure and blanking cap
• 964 intake-distributor application: M64.01, M64.02 and M64.03 engines, 1989–94
• 993 intake-distributor application: M64.20, M64.21, M64.22, M64.23 and M64.24 engines, 1994–98
• Also shown within the 993 Turbo throttle-body assembly, 1994–98, and the 2016 991 GT3 Cup oil-tank assembly
• Diagram ref no 24

Symptoms of Fault

• Hissing or whistling from the intake area
• Rough or hunting idle
• Hesitation during initial throttle application
• Lean-mixture or airflow-related fault codes
• A vacuum leak identified during smoke testing
• Visible cracking, hardening, distortion or looseness of the cap

Why Replacement Matters

Age, engine-bay heat and repeated heat cycles can cause a rubber closure cap to harden, split or lose its grip. Renewing a damaged or missing cap helps restore the intended seal. Inspect nearby sleeves, vacuum lines and clamps at the same time, as deterioration elsewhere in the intake assembly can produce similar symptoms.

OE Reference

• 93011025602

FAQs

• Can a damaged cap cause an intake leak? Yes. If the cap seals an intake-system opening, cracking or poor seating may allow unmetered air to enter.
• What should be checked during fitting? Confirm that the port is clean, the cap is fully seated and the surrounding hoses, sleeves and clamps are undamaged.
• How can compatibility be confirmed? Compare reference 93011025602 with the existing component and confirm the vehicle model, year, engine code and VIN where required.