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Tomei Valve Springs Set Type-B - PS13 RPS13 S14 S15 RNN14 - RHDJapan

Tomei Valve Springs Set Type-B - PS13 RPS13 S14 S15 RNN14

67719 JPY
TOMEI SKU: 9789 PN: 163055 (old part number 163025)
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List Price: ¥79,200

Sale Price: ¥67,719

You Save: ¥11,481


This set is required to transfer the exact movement of the camshaft to the valves at high engine speeds on high performance engines. Tomei`s extremely advanced manufacturing process of these springs increases reliability at high RPM`s and will reduce surging, jumping, bouncing, sagging and fatigue. Get this and all your JDM at RHDJapan!!
Brand: Tomei
Product: Valve Springs Set Type-B - PS13 RPS13 S14 S15 RNN14
Part Num: 163055 (old part number 163025)

FEATURES:
High quality designed springs is 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 users 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.

- Reliability in high RPM, and improvement in an initial response.
- High durability against metal fatigue.
- High durability against the shocks from jump and bounce.
- High durability against surging.
- High sag resistance.

- 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.

- 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.

- 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.

The Set Includes:
- 16x Inner Valve Springs
- 16x Outer Valve Springs
- 16x Special Retainers
- 16x Spring Sheets

SPECIFICATIONS:
- Type: B
- Diameter(mm):
-- Inner: 2.5
-- Outer: 4.0
- Set Lenght(mm):
-- Inner: 32.2
-- Outer: 40.0
- Lift Lenght(mm):
-- Inner: 19.7
-- Outer: 27.5
- Supported Lift(mm): 12.50
- Set Load (kgf):
-- Inner: 3.48%
-- Outer: 25.67%
-- Combined: 29.08%
- Lift Load (kgf):
-- Inner: 23.48%
-- Outer: 81.67%
-- Combined: 105.08%
- Rev Limit (Ref.): 8000
- Material: SWOSC-VX
- Process: Nitride
- Color ID: Red

COMPATIBILITY NOTES:
- These double springs are most suggested for Procam camshaft.
- For SR20DET engines.
Nissan 180SX RPS13 SR20DET (01/1991-12/1993)
Nissan 180SX RPS13 SR20DET (01/1994-07/1996)
Nissan 180SX RPS13 SR20DET (08/1996-12/1998)
Nissan Pulsar RNN14 SR20DET (08/1990-08/1992)
Nissan Pulsar RNN14 SR20DET (09/1992-01/1995)
Nissan Silvia PS13 SR20DET (01/1991-10/1993)
Nissan Silvia S14 SR20DET (06/1996-12/1998)
Nissan Silvia S14 SR20DET (10/1993-06/1996)
Nissan Silvia S15 SR20DET (01/1999-08/2002)

Product Reviews

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“ THE CUSTOMER'S VOICE ”

RHDJapan Store Reviews

bought one for my car, helpful salesperson and on time delivery. would buy again

ordered these a week ago or so and just received ! authentic product and am very please with delivery times :D
will continue to order more in the future!

very good pressure cap the only parts that i will use

Built quality is amazing as always, cusco reputation live up to it self, most of my suspension and braces are cusco and never dissapoint.. RHD Japan.. no need to say anymore, always awesome, loyal customer for 3 years and never a disappointment .. best place to get some rare Japanese made parts.. 99% of the time also with best pricing .

Awesome built quality, much better then the OEM STI ones which looks ... very inadequate.. RHD Japan awesome as always with quick response on item inquiries .. been getting car parts from these guys for 3 years and never dissapointed

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