Article

What Is It?

This kit replaces the factory single valve springs with a high-performance dual spring design. Instead of one spring per valve, you get an inner and outer spring working together.

That dual setup dramatically improves valve control at higher engine speeds, making it ideal for:

What Do Valve Springs Do?

Valve springs are responsible for closing the engine’s valves in sync with the camshaft’s movement. At lower engine speeds, stock springs typically manage this without issue. But as RPM increases — whether on the street or the track — the demands placed on valve springs rise significantly.

The Limits of OEM Valve Springs

OEM valve springs are engineered for comfort, efficiency, and longevity at factory RPM ranges. They are not designed for performance driving or racing conditions.

Common issues with OEM springs in modified A14 and A15 engines include:

• Valve float at higher RPM

Others Rodders of that time period from surrounding areas that we know of were, Johny Van Schalkwijk (‘34 Chevy coupe with a Studebaker V8 engine), Colin Brocklebank (‘39 Chevy sedan with Chevy V8), Derek Smith who designed and built the Stilletto Chevy V8, Lappies Labushagne (‘33 Chevy coupe with a Studebaker V8), Bobby Baker (‘34 Chevy coupe with Studebaker V8) and Frank Rundel's special.

STK Performance offers a range of hydraulic lifter camshafts engineered for real-world power, reliability, and application-specific valve train control. Each grind is tailored to a displacement range and intended use, ensuring your engine delivers power where you actually need it.

Let's compare the 5 most popular STK camshaft options and determine which works best for your application.

1955 — The First Generation

The pioneers of South African hot rodding.

Peter Jardine · Erik Brockelbank · Derek Smith · Clive Brooker · Danny Searl · Cedric Pearce · Colin Brockelbank

1960 — The Second Generation

Why Turbo Engines Absolutely Benefit from Camshaft Upgrades

A turbocharger forces additional air into the engine, but airflow efficiency still depends on how effectively the valves open and close. Valve timing, lift, and duration all play a critical role in cylinder filling and exhaust evacuation.

The Mr CarMan Electronic Ignition System changes that — without changing the heart of your vehicle.

But while Ted might love the thrill of speed, he’s got a much deeper purpose behind his adventures. Beneath that racing spirit beats a heart fully devoted to one cause — helping children in need through the annual Toy Run.

Exclusivity with a Modern Twist The Association is only for Cobra owners and builders. No outsiders, no casual observers — just people who understand the precision, power, and pride of owning a Cobra.