Tomei Japan Valve Spring Set For Nissan Skyline R32 GTST RB20DET & Fairlady Z Z32 300ZX VG30DETT 13203R800

High quality designed springs are required to transfer the exact movement of the camshaft to the valves at high engine speeds on high performance engines. The TOMEI products are always engineered with precision in mind to suit the user’s needs. So with this in mind careful choices in material selection is made with surface coating and other technologies. Then the pre-production products are put through an extensive testing program for checking durability, quality and performance. We spend time and money to help you save your valuable time and money.

FEATURE / SPEC

■ Multi Coil Unequal Pitch Springs
By combining several steps of spring rates into the one spring and vibration frequency becomes amazingly high. This greatly minimizes resonance and the chances of surging.

■ Advanced Oil Tempered Chromium-silicone Alloy Steel Core
Oil tempered chromium-silicone alloy steel wire is used which is considered to be the best material for springs for performance applications and evolved it even further. Combined with a new optimized design, not only did we make it tougher, we also succeeded in suppressing valve jumps or bounce even when raising the engines speeds RPM limit.

■ Shot Peening
A process that strikes many small steel balls onto the surface of the spring at high speeds is made to enhance the surface of the spring to raise its fatigue limit. Although it has been carried out earlier during the manufacturing process.

■ Warm Setting
The process that is adding higher loads beyond the actual limits to the highly heated spring. This will modify its shape and keep it permanently fixed. We succeeded in securing the highest performance over a long period of time while preventing sagging.

■ Nitriding
The surface treatment method for making nitrogen permeates the spring and gives it large surface compression repulsion. This method was chosen to raise the fatigue limit to suit the demands or running high lift camshafts. The dangers of spring failure is greatly reduced with the 1.5 times increase in the springs fatigue limit with the combined use of Oil tempered chromium-silicone alloy steel wire and Nitriding. This is how our valve springs are suitable for use on extreme engine speed conditions of super-high revs exceeding 10,000 RPM which had not been previously possible with high lift camshafts.

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Keiichi Suzuki was a NISSAN Works Team Driver as well as a mechanic, and other “JOHOKU RIDERS” launched “TOMEI MOTOR Inc”.
That’s right,”TOMEI” was created as a consequence of those car guys gathered.

Although “TOMEI MOTOR Inc.”later changed its name to “TOMEI POWERED”,
its spirit and passion has been inherited, just for more powerful and stronger engine.

In the very beginning we started of as a racing constructor of NISSAN type engines only and since day one we have produced & tuned many racing engines.
Our standard procedures with the biginning of each new engine development, is to thoroughly inspect each engine component thoroughli for every aspevt of each part after disassembling and cleaning each part.
This is our daily routine and habit.
We foumd this to be the best procedure to find and address the engines good points, weak points and it helps us to accurately re-evaluate it for its new purpose.
We then rebuild it and make it close to the original but a new stronger complete ideal balanced engine.
This is the basic procedures of our complete engine development.
We now make many complete engines of various brands and we’re not only limited to NISSAN engines.
But our procedures and goals remain the same since day one. We never neglect anyone nor do we risk taking any shortcuts as to make a better engine will always take time to forge every engine to perfection.

The end result is a complete product which has passed all these enduring processes to bring the best performance available that both we and the end user can be proud of and have every bit of confidence in our products and their cars performance.

TOMEI will keep challenging to make you satisfied.

Thank you very much for your continued support

As we have already announced, the original products of Tomei Powered USA Inc. starting with “T” in their part numbers are not designed, supervised, tested, manufactured or quality checked by us Tomei Powered Inc.

Now from March 2019, everything not only the “T” items Tomei Powered USA Inc. sells is their original product which is not from us Tomei Powered Inc. since the license contract we made with Tomei Powered USA Inc. has now expired as of the 28th of February 2019.

Please be advised we do not take any responsibility and we are not liable for any damage or loss through use of the original products of Tomei Powered USA Inc.

We sincerely apologize for any inconvenience this may cause, and much appreciate your understanding in this matter.