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GSC5094-GSC P-D Porsche 991 Turbo Conical Spring Set-Valve Springs, Retainers-GSC Power Division
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GSC P-D Porsche 991 Turbo Conical Spring Set

GSC5094
GSC5094
Valve Springs, Retainers
7 Units In Stock - Ships Next Business Day
$ 1,155.00 $ 981.75
$ 981.75

SKU: 5094

GSC P-D Porsche 991 Turbo Conical Spring Set 2014-2019

GSC Power-Division Porsche 991 Turbo Conical Spring Set GSC5094 equips 2014-2019 Porsche 911 Turbo Turbo S and GT2 RS models with precision-engineered valve springs. These conical springs deliver 180 lbs seat pressure at 1.90mm and 520 lbs open pressure at 11.00mm for stable valve motion at high RPM. The lightweight design cuts valvetrain mass to enable faster revs and consistent power delivery in demanding conditions.

Key Features

  • Conical Superlite Design: Reduces spring weight versus stock for quicker valve response and higher safe RPM limits up to 10,500.
  • 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.
  • Complete Set of 24 Springs: Covers all 24 valves on Porsche 3.8L twin-turbo flat-six engines.

Product Notes

  • Set includes inner and outer conical springs matched for progressive rate.
  • Pair with GSC titanium retainers for maximum weight savings.
  • Securely packaged to prevent damage during transit.

Installation Notes

  • Professional installation recommended.
  • Use Porsche-specific valve spring compressor tool for safe removal.
  • Compatible with OEM or GSC titanium retainers and keepers.

This Part Fits

Year Make Model Submodel
2014-2016 Porsche 911 Turbo
2014-2016 Porsche 911 Turbo S
2017-2019 Porsche 911 Turbo
2017-2019 Porsche 911 Turbo S
2018-2019 Porsche 911 GT2 RS

Why Choose GSC Power-Division?

  • Proven in Porsche racing teams for reliable high-boost performance.
  • USA-made with strict quality controls for consistent results.
  • Precision tolerances match OEM specs while exceeding stock limits.

Frequently Asked Questions

  • Q: Will this fit 2018-2019 Porsche 991 GT2 RS?
    A: Yes fits all 2018-2019 GT2 RS 3.8L models along with Turbo and Turbo S variants.
  • Q: What material makes up these valve springs?
    A: Constructed from high-tensile chromoly steel for strength and resistance to high heat cycles.
  • Q: What warranty covers GSC valve springs?
    A: Lifetime warranty against spring coil separation or failure when installed correctly.

Shipping & Handling

  • Method: UPS or FedEx ground shipping
  • Availability: In stock - ships same or next business day
  • Packaging: Protective box approximately 8 x 6 x 4 inches
  • Weight: 1.1 lbs

Request For Information

Have questions about GSC P-D Porsche 991 Turbo Conical Spring Set? Fill out the form below and we'll get back to you by the next business day.
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