MASSIVE High Lift Valve Spring & Titanium Retainer Kits – Zetec 2.0 DOHC + Duratec/MZR/EcoBoost 2.0/2.3/2.5 (Focus ST/RS)
MASSIVE High Lift Valve Spring & Titanium Retainer Kits – Zetec 2.0 DOHC + Duratec/MZR/EcoBoost 2.0/2.3/2.5 (Focus ST/RS) - ZETEC 2.0 is backordered and will ship as soon as it is back in stock.
Short Description
Short Description
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Delivery and Shipping
Delivery and Shipping
Domestic orders typically arrive within 3-7 business days, while international orders may take 7-14 business days. Please note that additional time may be required for items that are drop shipped or back-ordered.
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MASSIVE High Lift Valve Spring & Titanium Retainer Kits – Zetec...
Description
Description
If you’re stepping up cam lift, adding boost, or spinning higher RPM, factory springs and retainers become a limitation. MASSIVE’s High Lift Performance Kits solve it with high-rate chromium-silicon springs for superior fatigue life and precision 6Al-4V titanium retainers to reduce mass at the valve. The result is better valve control, less float, and the headroom your build needs for aggressive ramps and sustained pulls.
Both variants are engineered around real performance targets with consistent seat and open pressures and a reliable 7-degree lock interface. The Zetec 2.0 kit is a drop-in for classic Ford/Mazda applications and trims retainer mass by about a gram vs. OEM. The Duratec/MZR/EcoBoost kit covers today’s 2.0/2.3/2.5 families used across Focus ST, Focus RS, Mustang, Bronco, Ranger, and more. Whether you’re refreshing a Zetec head or pushing a big-turbo EcoBoost, this is the valvetrain foundation serious setups rely on.
Variants
Zetec 2.0 DOHC – MACM’17060
Duratec/MZR/EcoBoost 2.0/2.3/2.5 – MACM’170xx
Key Features
High-rate chromium-silicon springs for superior fatigue resistance
6Al-4V titanium retainers reduce valvetrain inertia
7-degree lock taper for secure keeper engagement
Optimized for high lift cams, high boost, and sustained high RPM
Direct-fit applications for Zetec 2.0 and Duratec/MZR/EcoBoost 2.0/2.3/2.5
What’s Included
Complete set of valve springs
Complete set of matched titanium retainers
Uses OE-style keepers/locks unless otherwise specified
Applications / Fitment
Zetec 2.0 DOHC: Ford Focus 2.0 Zetec, Escort ZX2, Contour/Mystique 2.0, Cougar 2.0, Escape 2.0; Mazda Tribute 2.0; Mercury Mariner 2.0. Not for Focus SVT cylinder head.
Duratec/MZR/EcoBoost 2.0 • 2.3 • 2.5: Ford Focus ST 2.0 EcoBoost, Focus RS 2.3 EcoBoost, Mustang 2.3 EcoBoost, Bronco 2.3, Ranger 2.3, Fusion/Mondeo 2.0, Escape/Kuga 2.0, Transit Connect 2.0 Duratec; Mazda 3/5/6, Mazdaspeed 3/6, CX-7 with MZR engines. Verify keeper/retainer interface for your specific head.
Compatibility Notes
Focus SVT: Not compatible with SVT head—use the appropriate Cat Cams spring/retainer set.
Machining: Some Zetec heads may need light spring-pocket opening.
Measurement: Always verify installed height, coil-bind margin, and retainer-to-seal clearance with your chosen cam lift.
Locks/Keepers: Confirm keeper angle and stem-groove style before assembly.
Builder Notes
Measure everything during mockup. Target the listed installed heights and pressures, maintain safe bind clearance, and recheck after final torquing. For aggressive profiles or extreme RPM, consult your cam grinder’s recommended seat/open pressures.
