2.0 & 2.3 EcoBoost Piper Double Valve Spring Kit Manley 4-piece collaborative design by Rockstar®

4-piece collaborative design by Rockstar® Energy

putting as much material thickness as possible in this critical area - most important when power levels get high

The science of lowering

COBB Installation Guides & Manuals

the cooler requires some modification to the under tray to allow it to fit due to its over sized core

2.0 & 2.3 EcoBoost Piper Double Valve Spring Kit Manley 4-piece collaborative design by Rockstar®Piper Double valve springs are engineered for our Race Spec camshafts and are also suitable for use with stock camshafts including Stg1 & 2 Camshafts Includes spring seats and valve stem seals. Rate: 52 N mm ~ 297. 00Lb Inch Seat Pressure: 20. 00KG ~ 45. 00 Lb f Installed height: 38. 00mm Valve Spring Features: Wound from high quality German steel Steel retainer set included