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Supertech Performance SPRK-H1022D-S14 Dual Valve Spring Titanium Retainer Kit

(1988-1991 BMW M3; 1987-1988 BMW M6)

Manufacturer

Picture for manufacturer Supertech Performance

Part Number

SPRK-H1022D-S14
13 reviews
Sale Price

$544.08

Estimated ship date Thursday, November 26

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Live-in-stock inventory

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Fitment guaranteed

Fitment guaranteed

Product Details

The Supertech Performance SPRK-H1022D-S14 is a precision-matched dual valve spring and titanium retainer kit engineered for the BMW S14 engine. Designed as a complete valvetrain overhaul solution, this kit delivers the performance, durability, and precision demanded by serious motorsport and high-performance street applications.

Kit Contents:

  • 16x Dual Valve Springs – SPR-H1022D/S14
  • 16x Titanium Retainers – RET-H70/T1
  • 16x Spring Seat Locators – SEAT-H1002/S14

Valve Spring Specifications:

  • Type: Dual Spring
  • Seat Pressure: 110 lbs @ 37.60mm
  • Max Lift: 15.60mm (0.614 in)
  • Coil Bind: 22.00mm (0.866 in)
  • Spring Rate: 11.2 lbs/mm
  • Outer Spring OD/ID: 29.00mm / 21.80mm
  • Inner Spring OD/ID: 21.00mm / 15.50mm

Key Features:

  • Manufactured from premium Super Clean Chrome Silicon Vanadium Steel alloy for maximum high-RPM durability
  • Computer-designed geometry ensures wire stress levels remain within fatigue diagram limits for long service life
  • Harmonic analysis integrated into design to keep resonance under control at extreme RPM
  • Titanium retainers CNC machined from military-certified titanium alloy for a precision, high-strength fit
  • Precision-matched components ensure proper spring seat pressure, coil bind clearance, and retainer fitment right out of the box

Supertech valve spring and retainer kits are trusted by performance builders worldwide for their combination of engineering precision, premium materials, and consistent quality. The SPRK-H1022D-S14 kit provides everything needed for a complete valvetrain refresh or high-performance build on the BMW S14 engine.

Products specifications

Fits

1988-1991 BMW M3; 1987-1988 BMW M6

Seat Press

110lbs @37.60mm

Delivered on time as ordered.

good

The manifold gasket was damaged upon arrival due to shifting of the iron manifold. The were placed into a cardboard box together without any packing material. I don't think it was Autoplicity's fault. I think it was the manufacture of the manifold since it was in their branded box.

Best price by far !

Received intake with no problems, installed sounds dope!

Smooth transaction, everything as expected.

First time, we will see

Best price and the shipping was not padded with invisible handling charges like you get with other vendors.

Order 12486. Item was simple to find and the website made it very easy to navigate. I appreciated the ability to pay with paypal and email notifications gave me confidence that everything was taken care of properly.

shipment came on time, and was nicely wrapped.

Just received my order! I placed the order Sunday night and received it on Tuesday, super fast shipping! The SS vent caps look great and arrived in perfect condition. Thanks!

Very nice people very considerate and helpful plus the price was nice

great fast tech support before purchase

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