Proline RPM Dual Valve Springs KIT fits 351C Cleveland & Chevy BBC 454 Cast Iron heads for Hydraulic Roller 155 lbs@ 1.900" Small OD.

DRP High RPM Polished Dual Valve Springs fits 351C Cleveland & BBC 454 for Hydraulic Roller Cams.

Suits Cast Iron Cylinder Heads for BBC 454 & 351 Cleveland*

Note: Cast Iron heads will require machine work to fit dual springs. 

If you have "Aluminium" cylinder heads, please see Part # DRP-9415P-BBKIT as these include a hardened locator. 

Proline Race/Endurance high performance series by PAC springs. 

Polished LS small OD style Hydraulic Roller Dual Valve Springs kits are the perfect upgrade to your 351 Cleveland or Big Block Chevy 454. These PAC hydraulic roller valve springs kits utilise a custom spec by DRP and combined with DRP hardware give you the best quality at the best price! The small yet powerful spring brings light weight valve train technology upgrade to the traditional Chevy & Cleveland cylinder heads. Achieve higher RPM with a more stable valvetrain.

Dual Valve Springs kit fits: Big Block Chevy 454 & 351 Cleveland.

Valve Spring Series: Proline RPM - Premium PAC endurace, Polished multi stage treatment.  

Installed Height: 1.900"

Seat Load: 155 lbs@ 1.900"

Spring Rate:  415 lbs/inch

Coil Bind: 1.122"

Max Lift: .710" @ 060" safety. 

Valve Spring Finish: Polished - bright.

Spring Retainers: 7 deg fits 11/32 stem  (included)

Spring Locators: Steel Shim only. Cast Iron valve guide 

Valve Locks: 7 deg - machined  (included)

Valve Stem Seals: White Teflon push on type (included)

Made in USA