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Supertech Dual Valve Spring Kit for Toyota 4AGE 16V - Max Lift 14.40mm, 16 Springs - SPRK-TC25D-2

If you're diving into the world of the Toyota 4AGE 16V, you’re probably already aware that the right valve springs can make a world of difference. I’ve spent some serious time behind the wheel of my 4AGE, and let me tell you, the Supertech Dual Valve Spring Kit is a game changer. This kit is designed for those who want to push their engine to the next level without compromising reliability.

First off, let’s talk about lift. With a max lift of 14.40mm, you’re getting some serious performance potential here. It’s all about maximizing airflow and efficiency, and these springs deliver. The coil bind is set at 21.00mm/17.00mm, which means you can rev high without worrying about the springs collapsing under pressure. Plus, with a rate of 12.6, they’re stiff enough to handle the demands of spirited driving yet still forgiving enough for everyday use.

This kit comes packed with everything you need, including 16 springs (model SPR-TC25D), 16 retainers (RET-2500/T1), and 16 valve guides (GDE-T4AGE-SM). Each component is designed to fit perfectly, ensuring a smooth installation process. The seat locators (SS-3012) and valve seals (VS-T6SM), all 16 of each, round out the package nicely. You won’t be left scrambling for parts when you’re ready to make the swap.

Now, let’s get a bit technical. The open pressure at 202 @ 10.5 and seat pressure at 73 @ 35.4 means these springs are built to handle some serious RPMs without losing their grip. The outer spring diameter is 25.00mm, while the inner is 18.00mm, giving you a solid setup that fits snugly in your engine. And if you’re curious about the valve seals, they’re designed to keep everything tight and leak-free, which is crucial for maintaining performance.

So, if you’re looking to enhance your Toyota 4AGE 16V’s performance, this Supertech Dual Valve Spring Kit is worth considering. It’s not just about the numbers; it’s about the experience of driving a well-tuned machine. Trust me, once you’ve installed these springs, you’ll feel the difference on the road.

Other Part Numbers:
Supertech #sptSPRK-TC25D-2

Proposition 65

⚠ WARNING: Cancer and Reproductive Harm
https://www.P65Warnings.ca.gov

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Who is Supertech?

Supertech is a company located in Silicon Valley San Jose, California. It is the place where companies with the most cutting-edge technology are located. It allows Supertech to gain access to the latest technology that helps them create high-quality products.  Supertech is known for manufacturing some of the best aftermarket internal engine parts in the industry. Today, they are considered the leading brand in their market segment.

Valve Train Component Experts

With over 30 years of experience, Supertech was able to develop products that meet the demands of their customers. They offer high-performance valves and valvetrain components that are used by many engine builders and tuners everywhere.

Racer’s Brand Of Choice

Supertech provides the motorsport industry with top-notched products for virtually any type of racing discipline. Whether it’s Road Racing, Drag Racing, or Rally, they have the right parts for you. Each piece is carefully designed and manufactured to provide optimum performance and give racers the competitive advantage they need to win championships.

Purchase Supertech Products At Vivid Racing

If you are in the market for high-quality performance parts for your engine, Supertech is the brand for you. The company has always been on edge in creating innovative products that would keep up with the fast-changing automotive trend. Whether for the tracks or the street, Supertech guarantees that you will only get the best products from them. To know more about Supertech, visit Vivid Racing and check out their list of parts that fit your specific needs.



Due to the nature of the application, these parts are sold without any express warranty or any implied warranty of merchantability, or fitness for a particular purpose.

Supertech Performance Inc. shall not, under any circumstances, be liable for any special, incidental or consequential damages, including, but not limited to, damage, or loss of property or equipment, loss of profits or revenue, cost of purchased or replacement goods, or claims of customers of the purchase, which may arise and/or result from sale, installation or use of these parts.

The sole obligation of Supertech Performance Inc., shall be limited only to the products to be found defective, in either workmanship or material, after inspection performed by our company. This Limited Warranty applies only to the original purchaser of the product and only covers the replacement or repair of the product at our election.

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