High Performance Valve Spring and Titanium Retainer Set, 911 (993)
Uprated springs with titanium retainers — the cheapest meaningful titanium on an air-cooled engine, and the part that lets it rev.
Engine Internals In production confidence: medium
Manufacturing
| Manufacturer | Patrick Motorsports |
|---|---|
| Origin | 🇺🇸 United States Vendor head office — place of manufacture not stated |
| Process | CNC Machined |
| Additively manufactured | No |
| Material | Titanium (grade not disclosed), Chromoly Steel |
| Notes | Titanium retainers cut reciprocating mass at the valve, which raises the speed at which the valvetrain loses control. Grade not published. |
Fitment
| 993 | All models |
|---|
Sources
- Engine Parts — 1995-1998 993 — Patrick Motorsports, accessed 2026-08-17