SKU: 85652714881

Supertech Performance SPRK-H1022D-VE Dual Valve Spring 123 @ 37.5 SPR-H1022D-VE + RET-NSR20/T1 + Fact Seat (to increase net lift it is necessary to machine inner spring boss)

Sale price$223.91 Regular price$248.79
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  • USA
  • CAN

Ships within 48 hours · Estimated delivery Sep 4 - Sep 9

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Description

Supertech Performance SPRK-H1022D-VE Dual Valve Spring 123 @ 37.5 SPR-H1022D-VE + RET-NSR20/T1 + Fact Seat (to increase net lift it is necessary to machine inner spring boss)Supertech Performance SPRK H1022D VE Dual Valve Spring 123 @ 37. 5 SPR H1022D VE + RET NSR20 T1 + Fact Seat (to increase net lift it is necessary to machine inner spring boss) Supertech valve springs are computer designed to ensure smooth harmonics under high RPM and load. The stress levels are kept under control and fatigue is reduced for long durability under extreme conditions. These springs are made of premium Superclean Chrome Silicon Vanadium

Supertech Performance SPRK-H1022D-VE Dual Valve Spring 123 @ 37.5 SPR-H1022D-VE + RET-NSR20/T1 + Fact Seat (to increase net lift it is necessary to machine inner spring boss)

Supertech valve springs are computer designed to ensure smooth harmonics under high RPM and load. The stress levels are kept under control and fatigue is reduced for long durability under extreme conditions. These springs are made of premium Superclean Chrome Silicon Vanadium steel alloy, which is a tough alloy that was designed for higher performance and durability at high RPM's and memory retention.

Specifications:

  • Outer Spring O.D.: 30.00mm
  • Outer Spring I.D.: 21.80mm
  • Inner Spring O.D.: 20.50mm
  • Inner Spring I.D.: 15.50mm
  • Seat: 130 @ 37.3 (lbs@mm)
  • Open (lift): 266 @ 10 (lbs@mm)
  • Max net lift: 11.50mm
  • Coil bind: 19.50mm
  • Rate: 11.20 lbs/mm

Retainer P/N: RET-NSR20/T1 (16) + OEM SEAT (To increase Net Lift it is necessary to machine inner spring boss)

Note: This is for a complete set of dual intake and exhaust valve springs. Retainers and spring seats are included if they are part of the kit.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 85652714881

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Natrona Heights, US
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These shoes were stuff for the first half hour but then feel great. Well worth the chance and money. Great quality and slip-on easy
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Phoenix, US
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Charlottesville, US
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My shoes look good and feel good and now I’m going to purchase the brown pair I saw
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Reviewed in the United States on April 24, 2026

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