MHS / PAC RPM Series .500" Lift Stage 2 4V Valve Springs

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SKU: MHS-702620-4V

.500 Lift Capable - No Machining Required. Supplied with MHS 4130 Chrome Moly Retainers.

Pricing: $699.00

Description
Spring Specs
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Description

MHS / PAC RPM Series Stage 2 4V Valve Springs

Manufactured by PAC Racing for Modular Head Shop
Designed for N/A and Moderate Forced Induction Applications up to 20lbs of boost
Endurance Heat Treatment and Surface Finishing for additional strength and reliability
Lighter than any other spring offered for this application
ID Chamfer Top and Bottom for consistent Retainer and Valve Seal / Seat fitment
97lbs Seat Pressure @ 1.480" Installed Height, 217 lbs/in. Rate, .920" Coil Bind

These MHS / PAC RPM Series Valve Springs are designed for use in 4.6L / 5.4L 4V B, C, 03/04 Cobra / Mach 1 and Navigator Cylinder Heads. They are supplied with your choice of 4130 Chrome Moly or 6AL-4V Titanium Retainers with a +.050" Design to raise the Installed Height from the typical 1.430" to 1.480".

We also encourage everyone running aftermarket 4V cams and valve springs to upgrade to the Accufab Secondary Timing Chains as the OEM Secondary chains were just not designed for much more spring pressure than stock.

For Full Spring Specs, please see the tab above.

Spring Specs

Part Number	MHS-702620-4V
Application	Ford 4.6L / 5.4L - Non GT500 B, C, 03/04 Cobra, Mach 1, Navigator
Seat Pressure	97lbs @ 1.480"
Open Pressure	206lbs @ .980"
Spring Rate	217 lbs / in
Coil Bind	.920"
Max Lift	.500"
Spring ID Top	.538"
Spring ID Bottom	.700"
Spring Weight (g)	39.6g
Features	PAC RPM Processing, ID / OD Chamfer
Included Retainers	4130 Chrome Moly - 7.3g
Optional Retainers	6AL-4V Titanium - 4.4g