HEAD RELATED

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 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.

Developement target ●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

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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

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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.


Oval Wire

Oval wire valve springs feature greater compression than regular valve springs, allowing them to work with a wider range of 'lift' settings. This makes them compatible with both stock AND aftermarket high lift camshafts.

(VR38/VQ35/KA24/4G63/4B11/G4KF)


Using highly durable oval wire allows the valve springs to compress even further whilst still retaining sufficient force. Compatible with many high lift camshafts, these springs provide reliable performance even under load at higher RPMs.

Terminology
Surging The Phenomenon which material of the valve spring resonance and causes the spring itself to vibrate violently.
Jump The Phenomenon that the valve rallies to the cam surface instead of settled back. It happens when the valve cannot follow the camshaft rotation and lifted irregally.
Bounce The Phenomenon that the valve is bouncing repeatedly from valve seat other than sticking to it when it is closing.
Fatigue Breakage that occurs during the repeat operation of the spring. (The larger lift, the more possibilities to get fatigued)
Sag The Phenomenon in which the load (free play) of a spring decreases while inuse. It is related to the maximum stress under operation and use time.




VALVE SPRING

Filtered by:

  • TYPE: WHOLE UNIT

  • Parts No.TA304A-MT01A
  • Weight4 lbs
  • MSRP$200.00
  • Dimension7 x 6 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock34
  • EngineMITSUBISHI 4G63
  • NoteIn Stock Now!
  • ModelMITSUBISHI EVO1-9
  • Available Repair PartsNo
  • Parts No.TA304A-MT01A
  • MSRP$200.00
  • Sub CategoryVALVE SPRING
  • EngineMITSUBISHI 4G63
  • ModelMITSUBISHI EVO1-9
  • Weight4 lbs
  • Dimension7 x 6 x 3 inch
  • Qty in Stock34
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-MT02A
  • Weight2 lbs
  • MSRP$380.00
  • Dimension7 x 6 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock4
  • EngineMITSUBISHI 4B11, HYUNDAI G4KF
  • NoteIn Stock Now!
  • ModelMITSUBISHI EVO10, HYUNDAI GENESIS COUPE
  • Available Repair PartsNo
  • Parts No.TA304A-MT02A
  • MSRP$380.00
  • Sub CategoryVALVE SPRING
  • EngineMITSUBISHI 4B11, HYUNDAI G4KF
  • ModelMITSUBISHI EVO10, HYUNDAI GENESIS COUPE
  • Weight2 lbs
  • Dimension7 x 6 x 3 inch
  • Qty in Stock4
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS01A
  • Weight3 lbs
  • MSRP$450.00
  • Dimension8 x 7 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock23
  • EngineNISSAN VR38DETT
  • NoteIn Stock Now!
  • ModelNISSAN 35 GT-R
  • Available Repair PartsYes
  • Parts No.TA304A-NS01A
  • MSRP$450.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN VR38DETT
  • ModelNISSAN 35 GT-R
  • Weight3 lbs
  • Dimension8 x 7 x 3 inch
  • Qty in Stock23
  • NoteIn Stock Now!
  • Available Repair PartsYes

  • Parts No.TA304A-NS02A
  • Weight4 lbs
  • MSRP$450.00
  • Dimension8 x 7 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock11
  • EngineNISSAN VQ35DE, NISSAN VQ35HR
  • NoteIn Stock Now!
  • ModelNISSAN 350Z
  • Available Repair PartsNo
  • Parts No.TA304A-NS02A
  • MSRP$450.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN VQ35DE, NISSAN VQ35HR
  • ModelNISSAN 350Z
  • Weight4 lbs
  • Dimension8 x 7 x 3 inch
  • Qty in Stock11
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS05A
  • Weight4 lbs
  • MSRP$300.00
  • Dimension8 x 7 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock25
  • EngineNISSAN RB26DETT
  • NoteIn Stock Now!
  • ModelNISSAN 32 GT-R, NISSAN 33 GT-R, NISSAN 34 GT-R
  • Available Repair PartsNo
  • Parts No.TA304A-NS05A
  • MSRP$300.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN RB26DETT
  • ModelNISSAN 32 GT-R, NISSAN 33 GT-R, NISSAN 34 GT-R
  • Weight4 lbs
  • Dimension8 x 7 x 3 inch
  • Qty in Stock25
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS05B
  • Weight5 lbs
  • MSRP$540.00
  • Dimension8 x 7 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock13
  • EngineNISSAN RB26DETT
  • NoteIn Stock Now!
  • ModelNISSAN 32 GT-R, NISSAN 33 GT-R, NISSAN 34 GT-R
  • Available Repair PartsNo
  • Parts No.TA304A-NS05B
  • MSRP$540.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN RB26DETT
  • ModelNISSAN 32 GT-R, NISSAN 33 GT-R, NISSAN 34 GT-R
  • Weight5 lbs
  • Dimension8 x 7 x 3 inch
  • Qty in Stock13
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS06A
  • Weight4 lbs
  • MSRP$300.00
  • Dimension8 x 7 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock37
  • EngineNISSAN RB25DE, NISSAN RB25DET
  • NoteIn Stock Now!
  • ModelNISSAN 33 SKYLINE
  • Available Repair PartsNo
  • Parts No.TA304A-NS06A
  • MSRP$300.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN RB25DE, NISSAN RB25DET
  • ModelNISSAN 33 SKYLINE
  • Weight4 lbs
  • Dimension8 x 7 x 3 inch
  • Qty in Stock37
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS06B
  • Weight4 lbs
  • MSRP$540.00
  • Dimension8 x 7 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock11
  • EngineNISSAN RB25DE, NISSAN RB25DET
  • NoteIn Stock Now!
  • ModelNISSAN 33 SKYLINE
  • Available Repair PartsNo
  • Parts No.TA304A-NS06B
  • MSRP$540.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN RB25DE, NISSAN RB25DET
  • ModelNISSAN 33 SKYLINE
  • Weight4 lbs
  • Dimension8 x 7 x 3 inch
  • Qty in Stock11
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS07A
  • Weight4 lbs
  • MSRP$300.00
  • Dimension8 x 7 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock8
  • EngineNISSAN RB20DE, NISSAN RB20DET
  • NoteIn Stock Now!
  • ModelNISSAN 32 SKYLINE, NISSAN 33 SKYLINE, NISSAN 34 SKYLINE, NISSAN 300ZX
  • Available Repair PartsNo
  • Parts No.TA304A-NS07A
  • MSRP$300.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN RB20DE, NISSAN RB20DET
  • ModelNISSAN 32 SKYLINE, NISSAN 33 SKYLINE, NISSAN 34 SKYLINE, NISSAN 300ZX
  • Weight4 lbs
  • Dimension8 x 7 x 3 inch
  • Qty in Stock8
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS08A
  • Weight3 lbs
  • MSRP$200.00
  • Dimension7 x 6 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock47
  • EngineNISSAN SR20DE, NISSAN SR20DET
  • NoteIn Stock Now!
  • ModelNISSAN 13 SILVIA, NISSAN 14 SILVIA, NISSAN 15 SILVIA, NISSAN 180SX
  • Available Repair PartsNo
  • Parts No.TA304A-NS08A
  • MSRP$200.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN SR20DE, NISSAN SR20DET
  • ModelNISSAN 13 SILVIA, NISSAN 14 SILVIA, NISSAN 15 SILVIA, NISSAN 180SX
  • Weight3 lbs
  • Dimension7 x 6 x 3 inch
  • Qty in Stock47
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS11A
  • Weight3 lbs
  • MSRP$200.00
  • Dimension7 x 6 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock16
  • EngineNISSAN CA18DE, NISSAN CA18DET
  • NoteIn Stock Now!
  • ModelNISSAN 13 SILVIA, NISSAN 180SX
  • Available Repair PartsNo
  • Parts No.TA304A-NS11A
  • MSRP$200.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN CA18DE, NISSAN CA18DET
  • ModelNISSAN 13 SILVIA, NISSAN 180SX
  • Weight3 lbs
  • Dimension7 x 6 x 3 inch
  • Qty in Stock16
  • NoteIn Stock Now!
  • Available Repair PartsNo

  • Parts No.TA304A-NS16A
  • Weight3 lbs
  • MSRP$300.00
  • Dimension7 x 6 x 3 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock68
  • EngineNISSAN KA24DE
  • NoteIn Stock Now!
  • ModelNISSAN 13 240SX, NISSAN 14 240SX
  • Available Repair PartsYes
  • Parts No.TA304A-NS16A
  • MSRP$300.00
  • Sub CategoryVALVE SPRING
  • EngineNISSAN KA24DE
  • ModelNISSAN 13 240SX, NISSAN 14 240SX
  • Weight3 lbs
  • Dimension7 x 6 x 3 inch
  • Qty in Stock68
  • NoteIn Stock Now!
  • Available Repair PartsYes

  • Parts No.TA304A-SB01A
  • Weight2 lbs
  • MSRP$200.00
  • Dimension7 x 7 x 4 inch
  • Sub CategoryVALVE SPRING
  • Qty in Stock24
  • EngineSUBARU EJ255, SUBARU EJ257, SUBARU EJ205, SUBARU EJ207
  • NoteIn Stock Now!
  • ModelSUBARU WRX, SUBARU WRX STI
  • Available Repair PartsNo
  • Parts No.TA304A-SB01A
  • MSRP$200.00
  • Sub CategoryVALVE SPRING
  • EngineSUBARU EJ255, SUBARU EJ257, SUBARU EJ205, SUBARU EJ207
  • ModelSUBARU WRX, SUBARU WRX STI
  • Weight2 lbs
  • Dimension7 x 7 x 4 inch
  • Qty in Stock24
  • NoteIn Stock Now!
  • Available Repair PartsNo