These Ferrea Pro CNC Titanium Retainers reduce valvetrain mass on BMW S42/M42/M50/S50/M52/M54 inline engines for improved valvetrain stability and added horsepower. They use a 7-degree lock angle for Ferrea double-spring setups. Sold as a set of 12.
| Brand | Ferrea |
| Type | Pro CNC titanium retainers (double spring) |
| Application | BMW S42 / M42 / M50 / S50 / M52 / M54 |
| Lock Angle | 7° |
| Quantity | Set of 12 |
| Part Number | E11025 |
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