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GSC P-D Porsche 991 Turbo Conical Spring Set - GSC Power Division 5094
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GSC P-D Porsche 991 Turbo Conical Spring Set

GSC5094
GSC5094
Valve Springs, Retainers
10 Units In Stock
$ 1,155.00 $ 954.51
$ 954.51

The GSC Power Division Porsche 991 Turbo Conical Spring Set is a valve springs, retainers for an engine platform that requires exact vehicle and cylinder-head confirmation. Match manufacturer part number 5094, engine code, cylinder-head configuration, dimensions, position, material, and package quantity before ordering.

Key Features

  • Seat Pressure 180 lbs @ 1.90mm: Provides firm control to prevent valve float during aggressive acceleration.
  • Open Pressure 520 lbs @ 11.00mm: Handles high-lift cams with 13.40mm coil bind height for full compatibility.
  • Chromoly Steel Construction: High-tensile material ensures fatigue resistance and long service life under boost.
  • Conical Superlite Design: Reduces spring weight versus stock for quicker valve response and higher safe RPM limits up to 10,500.
  • Complete Set of 24 Springs: Covers all 24 valves on Porsche 3.8L twin-turbo flat-six engines.
  • Set includes inner and outer conical springs matched for progressive rate.

Fitment

Years Make Model Application
Verification required Confirm vehicle Confirm model Match the exact engine platform, cylinder-head configuration, dimensions, and current GSC application before ordering

Specifications

Brand GSC Power Division
Manufacturer Part Number 5094
Product Type Valve Springs, Retainers
Fitment Type Fitment Verification Required
Condition New

What's Included

One new GSC Power Division valve springs, retainers package identified by manufacturer part number 5094, in the size and quantity stated by the title. Springs, retainers, locks, valves, guides, seals, followers, shims, bearings, fasteners, gaskets, lubricants, and other assembly parts are included only when expressly listed for this exact part number.

About GSC Power Division

GSC Power Division develops performance camshafts, valves, valve guides, springs, retainers, seals, and related valvetrain components for import and domestic engine platforms.

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Frequently Asked Questions

Can I mix these parts with another camshaft or valvetrain brand?
Only after confirming dimensions, materials, installed height, spring pressure, lift capacity, and geometry for the complete combination. Similar-looking components are not automatically interchangeable.

Do valve springs need to be checked before installation?
Yes. Measure installed height, seat and open pressure, coil-bind clearance, retainer-to-seal clearance, and maximum lift for the exact cylinder head and camshaft.

Should valvetrain components be replaced as a complete set?
Follow the engine builder's inspection and measurement results. Worn mating components can affect geometry and durability even when only one part is being upgraded.

Installation Instructions

Follow current GSC Power Division instructions and the vehicle service manual for part number 5094. Have a qualified engine builder inspect the cylinder head and mating components, perform required machining, measure every specified clearance, verify timing and free movement, and use the correct lubrication, fasteners, torque procedures, and clean assembly practices before startup.

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