High-Performance Valve Springs for Audi RS3 & TTRS: STK Performance Advantage

When it comes to extracting the maximum performance from Audi’s legendary 2.5 TFSI engines found in the RS3 and TTRS, upgrading the valvetrain components is crucial—especially when increasing boost, raising RPM limits, or upgrading camshaft profiles. One of the most critical elements in a high-performance valvetrain setup is the valve springs. This is where STK

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STK Camshaft Warranty

STK Performance warrants that all Performance Camshafts are free from defects in material , workmanship and against excessive wear for a period of 12 months from the date of purchase. This Limited Warranty shall apply for a period of 12 months from the date of purchase and shall cover only the original purchaser. This Warranty

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Break-in Process

STK Performance Valve Train Products (VTP’s) are manufactured from the finest Quality Materials available and have been Developed & Tested under severe Motorsport conditions. To ensure that your STK Performance VTP performs to its optimum ensure that the following “Break-In” Procedures are strictly adhered to: STK Camshafts & STK Heavy Duty Camfollowers ( VW )

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STK Performance Valve Springs

STK Performance Valve Springs

Dual Valve Spring sets consist of an innerspring and an outer spring per valve. These springs are rated at 200 pounds pressure compared to a standard production spring of around 80 – 90 pounds pressure. There are various modifications to ensure the correct fitment of these springs the main factor is to ensure that the

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Dual Racing Valve Spring + Valve Kit VW ABF - STK Performance Camshafts & Valve Train Components

Rev Kits

When operating at high RPM it is advisable to replace the standard production valve spring with a heavy-duty valve spring. Benefits when installed correctly :Avoid Coil BindAvoid valve bounceAvoid valve spring failureAvoid valve damageAvoid power loss A standard valve spring has a pressure rating of around 80lbs pressure fully compressedA Competition Valve Spring has a

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What is a Rev Kit?

REV Kits We receive calls daily regarding requests for Rev Kits… unfortunately, the understanding of a Rev Kit is completely misunderstood and we’d like to point you in the right direction should you be considering upgrading your ride… What is a Rev Kit… The biggest misconception is that by fitting a Rev Kit and removing

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It’s All About Reliability

STK Performance Cam Bucket for Mechanical / Solid Application ( Volkswagen 8v & 16v ) Part Number STK3S Improved top thickness 0,5mm-1mm thickness on the surface of the cam Bucket ( as per diagram ) This material specification & hardness will prevent the Cam Bucket from becoming concave due to inferior standard production cam buckets Enables

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What is 21-4N?

The STK Performance Valve is forged using 21-4N Stainless Steel which is strong and can handle most applications. What is 21-4N ? 21-4N Super alloys or high performance alloys have an ability to function at temperatures above 540ºC(1000ºF) with deformation resistance and high surface stability. Super alloy 21-4N valve steel is widely used in the

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