Proline RPM Dual Valve Springs Kits Hydraulic ROLLER 11/32" valve, Fits "CAST IRON" - 350 Chevy, 302W Windsor, Chrysler 360, Holden 253 308

Detroit Racing Products - Dual Valve Springs Kit - Proline Series - High RPM

Suits "CAST IRON"* Holden, Chevy, Ford & Chrylser Cylinder heads with 11/32" valves.

Upgrade & modernise your Chevy 350, Ford Windsor small blocks & Holden 308* with these small OD, light weight dual valve springs kits. 

Whats in the Kit?

• PAC Dual Springs - DRP-8415P-16  (Proline RPM series)
• Steel Retainers - 7 Deg *(can upgrade to tool steel)
• Locks - 7 Deg / 11/32" Valve square groove (Race Machined)
• Valve Stem seals: TEFLON push on type - 0.530" guide / 11/32" Valve stem
• NO LOCATORS - use the cast iron heads and guide as the base & locator. 

*NOTE: machine work required to fit Cast Iron heads.

*NOTE: for Holden 308: Holden 308 heads will need spring pads machined down to fit a 1.800" installed - use Comp Cams cutter #4716CPG - Cutter is 1.320" OD x 0.630" *Spring Locator Base is then optional.

Installed Height: 1.800"

Seat Load: 160lbs @ 1.800" /  181lbs @ 1.750"

Spring Rate:   417 lbs / inch

Max Lift: .670" @ 060" safety.

Made in USA.

BE ADVISED: IMAGE MAY DIFFER FROM ACTUAL PRODUCT.