When building a turbo Opel Corsa 8-valve engine, one of the biggest restrictions in the setup is often the factory camshaft. While the standard cam profile is designed for smooth daily driving, fuel economy, and reliability, it quickly becomes a limitation once boost, airflow, and performance upgrades are introduced. That’s where the STK Opel Corsa […]

When building or upgrading a high-performance Ford Duratec engine, one of the most critical yet often overlooked components is the valvetrain—specifically, the valve springs. The STK Single Valve Spring Kit for Ford ST150/170 is designed to handle the increased demands of modified engines, ensuring reliability, stability, and performance at high RPM. Product Overview The STK

When building or upgrading a performance engine—especially something like a Mazda MPS—most people focus on the obvious: bigger turbos, aggressive tuning, and upgraded fueling. But one of the most critical components is often overlooked: the valvetrain. More specifically, the valve springs. The STK Performance Single Valve Spring Kit for Mazda MPS is designed to solve

When it comes to pushing the legendary Nissan SR20 engine beyond factory limits, most builders focus on turbos, fuel systems, and tuning. But one of the most overlooked — and most critical — components in a high-performance engine is the valvetrain. And more specifically… the valve springs. If you’re chasing higher RPM, bigger cams, or

When it comes to performance and reliability, most enthusiasts focus on big upgrades—cams, turbos, injectors. But often, the real problem lies in the smallest components. In the case of VW 16V engines, one of the most overlooked culprits behind poor performance, noise, and long-term engine damage is the cam follower. And more importantly—the right hydraulic

BMW engines are known for their balance of performance, refinement, and engineering excellence. Platforms like the M20, M30, M50, M52, and M54 have become favourites among enthusiasts for builds ranging from daily drivers to full race cars. But once you start pushing beyond factory limits, a reality sets in: OEM components were never designed for