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

4-piece collaborative design by Rockstar® Energy

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

Sizes held to some of the tightest tolerances in the industry

Part Number: 208-4301

gained through competition pad developments

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