Tomei presents the popular poncams. Generally, engine tuning is to modify the torque characteristic of engine by changing cam duration timing and height of the cam lift, so as to gaining maximum torque and horse power. However, when tuning the engine strictly, it should be carried out with the idea of securing effective area of the valve not only by duration timing and height of the cam lift, but also by through improvement of its intake efficiency.
High valve lift allows huge amount of air to flow in, yet it mechanically damages the system and gains friction loss. Also, wide cam duration will deriver great power at high RPM, but it gives rough engine character at low RPM too. Tomei have worked to get an ideal well-balanced profile of camshaft and succeeded to give it 1.3 to 1.5 times more effective area than regular camshafts
Features
Tomei have been developing and producing their original camshafst ever since TOMEI established. Still today, they are providing high performance camshaft to many racing teams and winning lots of titles.
Type A
In order to get stable idle and raise low-mid RPM torque, we set the duration of EX camshaft shorter.
Best suit used with stock turbine or N1 turbine.
Type B
By giving longer duration timing than type a, it eables to raise both response and peak power at the same time, even with mid-large sized turbine.
We ship to the United States and 150 other countries.
Japan Post EMS & ePacket, FedEx, DHL and more.
| Vehicle | Type | IN Duration | EX Duration | IN Lift | EX Lift | Price | Order | |
|---|---|---|---|---|---|---|---|---|
| 143040 In stock at Tomei | ||||||||
| 180SX - RS13 SR20DE | Type N | 260 degrees | 260 degrees | 11.2 mm | 11.2 mm | | ||
| 143079 Back in stock 15 Nov 2026 at Tomei | ||||||||
| 180SX - RS13 SR20DET | Solid | 260 degrees | 260 degrees | 11.0 mm | 11.0 mm | | | |
| 143043 In stock at Tomei | ||||||||
| 180SX - RS13 SR20DET | Type R | 256 degrees | 256 degrees | 11.5 mm | 11.5 mm | | ||
| 143069 | ||||||||
| GT-R - R35 | 256 degrees | 264 degrees | 10.25 mm | 10.5 mm | | |||
| 143041 In stock at Tomei | ||||||||
| Primera - P10 SR20DE | Type N | 260 degrees | 260 degrees | 11.2 mm | 11.2 mm | | ||
| 143039 In stock at Tomei | ||||||||
| Primera - P11 SR20DE | Type N | 260 degrees | 260 degrees | 11.2 mm | 11.2 mm | | ||
| 143040 In stock at Tomei | ||||||||
| Silvia - S13 SR20DE | Type N | 260 degrees | 260 degrees | 11.2 mm | 11.2 mm | | ||
| 143079 Back in stock 15 Nov 2026 at Tomei | ||||||||
| Silvia - S13 SR20DET | Solid | 260 degrees | 260 degrees | 11.0 mm | 11.0 mm | | | |
| 143043 In stock at Tomei | ||||||||
| Silvia - S13 SR20DET | Type R | 256 degrees | 256 degrees | 11.5 mm | 11.5 mm | | ||
| 143042 In stock at Tomei | ||||||||
| Silvia - S14 SR20DE | Type N | 260 degrees | 260 degrees | 11.2 mm | 11.2 mm | | ||
| 143080 In stock at Tomei | ||||||||
| Silvia - S14 SR20DET | Solid | 260 degrees | 260 degrees | 11.0 mm | 11.0 mm | | | |
| 143044 In stock at Tomei | ||||||||
| Silvia - S14 SR20DET | Type R | 256 degrees | 256 degrees | 11.5 mm | 11.5 mm | | ||
| 143042 In stock at Tomei | ||||||||
| Silvia - S15 SR20DE | Type N | 260 degrees | 260 degrees | 11.2 mm | 11.2 mm | | ||
| 143080 In stock at Tomei | ||||||||
| Silvia - S15 SR20DET | Solid | 260 degrees | 260 degrees | 11.0 mm | 11.0 mm | | | |
| 143044 In stock at Tomei | ||||||||
| Silvia - S15 SR20DET | Type R | 256 degrees | 256 degrees | 11.5 mm | 11.5 mm | | ||
| 143019 In stock at Tomei | ||||||||
| Skyline - R32 GTS-t/4 - HCR32 RB20DET | 256 degrees | 256 degrees | 8.5 mm | 8.5 mm | | |||
| 143020 In stock at Tomei | ||||||||
| Skyline - R33 GTS-t - ECR33 Aug-1993 to Sep-1997 | 256 degrees | 256 degrees | 8.5 mm | 8.5 mm | | |||
| 143050 In stock at Tomei | ||||||||
| Skyline - R33 GTS-t - ECR33 Sep-1997+ (CAS change) | 256 degrees | 256 degrees | 8.5 mm | 8.5 mm | | |||
| 143046 In stock at Tomei | ||||||||
| Skyline - R34 25GTT - ER34 | Type A | 252 degrees | 252 degrees | 9.15 mm | 9.15 mm | | ||
| 143023 In stock at Tomei | ||||||||
| Skyline - R34 25GTT - ER34 | Type B | 260 degrees | 260 degrees | 9.15 mm | 9.15 mm | | ||
| 143036 Limited stock at Tomei | ||||||||
| Skyline GT-R - BNR32 | Type A | 260 degrees | 252 degrees | 9.15 mm | 9.15 mm | | ||
| 143005 Limited stock at Tomei | ||||||||
| Skyline GT-R - BNR32 | Type B | 260 degrees | 260 degrees | 9.15 mm | 9.15 mm | | ||
| 143051 In stock at Tomei | ||||||||
| Skyline GT-R - BNR32 | Type R | 250 degrees | 250 degrees | 9.15 mm | 9.15 mm | | ||
| 143036 Limited stock at Tomei | ||||||||
| Skyline GT-R - BCNR33 | Type A | 260 degrees | 252 degrees | 9.15 mm | 9.15 mm | | ||
| 143005 Limited stock at Tomei | ||||||||
| Skyline GT-R - BCNR33 | Type B | 260 degrees | 260 degrees | 9.15 mm | 9.15 mm | | ||
| 143051 In stock at Tomei | ||||||||
| Skyline GT-R - BCNR33 | Type R | 250 degrees | 250 degrees | 9.15 mm | 9.15 mm | | ||
| 143037 | ||||||||
| Skyline GT-R - BNR34 | Type A | 260 degrees | 252 degrees | 9.15 mm | 9.15 mm | | ||
| 143018 | ||||||||
| Skyline GT-R - BNR34 | Type B | 260 degrees | 260 degrees | 9.15 mm | 9.15 mm | | ||
| 143052 In stock at Tomei | ||||||||
| Skyline GT-R - BNR34 | Type R | 250 degrees | 250 degrees | 9.15 mm | 9.15 mm | | ||
| Vehicle | Type | IN Duration | EX Duration | IN Lift | EX Lift | Price | Order | |
|---|---|---|---|---|---|---|---|---|
| 143082 | ||||||||
| 1JZ-G(T)E Late | Type B | 260 degrees | 264 degrees | 8.8 mm | 8.7 mm | | ||
| 143071 Limited stock at Tomei | ||||||||
| 1JZGTE Late | Type A | 250 degrees | 260 degrees | 8.8 mm | 9.1 mm | | ||
| 143072 In stock at Tomei | ||||||||
| 2JZ-G(T)E 2JZ-GTE Early | 264 degrees | 264 degrees | 9.5 mm | 9.5 mm | | |||
| 143075 In stock at Tomei | ||||||||
| 2JZ-GTE (VVTi) LATE | 252 degrees | 260 degrees | 8.9 mm | 9.1 mm | | |||
| 143056 In stock at Tomei | ||||||||
| 4A-G(Z)E 4 Valve | 264 degrees | 264 degrees | 8.15 mm | 8.15 mm | | |||
| 143073 | ||||||||
| 4A-G(Z)E 5 Valve | 264 degrees | 256 degrees | 9.0 mm | 9.0 mm | | |||
| 143056 In stock at Tomei | ||||||||
| 4A-GE 4 Valve | 264 degrees | 264 degrees | 8.15 mm | 8.15 mm | | |||
| 143073 | ||||||||
| 4AGE 5 Valve | 264 degrees | 256 degrees | 9.0 mm | 9.0 mm | | |||
| Vehicle | Type | IN Duration | EX Duration | IN Lift | EX Lift | Price | Order | |
|---|---|---|---|---|---|---|---|---|
| 143032 | ||||||||
| Lancer Evolution - CD9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143032 | ||||||||
| Lancer Evolution II - CE9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143032 | ||||||||
| Lancer Evolution III - CE9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143033 In stock at Tomei | ||||||||
| Lancer Evolution IV - CN9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143066 Limited stock at Tomei | ||||||||
| Lancer Evolution IV - CN9A | Type R | 270 degrees | 270 degrees | 10.7 mm | 10.2 mm | | ||
| 143058 In stock at Tomei | ||||||||
| Lancer Evolution IX - CT9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143068 In stock at Tomei | ||||||||
| Lancer Evolution IX - CT9A | Type R | 270 degrees | 270 degrees | 10.7 mm | 10.2 mm | | ||
| 143033 In stock at Tomei | ||||||||
| Lancer Evolution V - CP9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143066 Limited stock at Tomei | ||||||||
| Lancer Evolution V - CP9A | Type R | 270 degrees | 270 degrees | 10.7 mm | 10.2 mm | | ||
| 143033 In stock at Tomei | ||||||||
| Lancer Evolution VI - CP9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143066 Limited stock at Tomei | ||||||||
| Lancer Evolution VI - CP9A | Type R | 270 degrees | 270 degrees | 10.7 mm | 10.2 mm | | ||
| 143038 | ||||||||
| Lancer Evolution VII - CT9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143067 In stock at Tomei | ||||||||
| Lancer Evolution VII - CT9A | Type R | 270 degrees | 270 degrees | 10.7 mm | 10.2 mm | | ||
| 143038 | ||||||||
| Lancer Evolution VIII - CT9A | 260 degrees | 260 degrees | 10.7 mm | 10.2 mm | | |||
| 143067 In stock at Tomei | ||||||||
| Lancer Evolution VIII - CT9A | Type R | 270 degrees | 270 degrees | 10.7 mm | 10.2 mm | | ||
| 143059 | ||||||||
| Lancer Evolution X - CZ4A | Type R | 260 degrees | 250 degrees | 10.3 mm | 9.8 mm | | ||
| Vehicle | IN Duration | EX Duration | IN Lift | EX Lift | Price | Order | |
|---|---|---|---|---|---|---|---|
| 143054 Limited stock at Tomei | |||||||
| Roadster - NB8C | 252 degrees | 256 degrees | 10.0 mm | 10.0 mm | | ||
| Vehicle | IN Duration | EX Duration | IN Lift | EX Lift | Price | Order | |
|---|---|---|---|---|---|---|---|
| 143060 In stock at Tomei | |||||||
| Impreza WRX STI - GDB JDM EJ207 | 250 degrees | 256 degrees | 9.6 mm | 9.8 mm | | ||
| 143062 | |||||||
| Impreza WRX STI - GDB JDM EJ255, USDM EJ257 2004-2007 | 252 degrees | 252 degrees | 10.3 mm | 10.3 mm | | ||
| 143070 In stock at Tomei | |||||||
| Impreza WRX STI - GRB JDM EJ207, USDM EJ257 2008+ | 260 degrees | 256 degrees | 9.8 mm | 10.8 mm | | ||
| 143070 In stock at Tomei | |||||||
| Impreza WRX STI - GVB JDM EJ207, USDM EJ257 2008+ | 260 degrees | 256 degrees | 9.8 mm | 10.8 mm | | ||
| IN Duration | EX Duration | IN Lift | EX Lift | Price | Order | |
|---|---|---|---|---|---|---|
| 143076 | ||||||
| 240 degrees | 248 degrees | 9.0 mm | 9.1 mm | DISCONTINUED This part is no longer available | ||
| 143025 | ||||||
| 256 degrees | 256 degrees | 8.5 mm | 8.5 mm | | DISCONTINUED This part is no longer available | |
Tomei was founded in 1968 by members of the Johoku Riders motorcycle club, among them Nissan works driver Seiichi Suzuki. It began as a racing engine builder for Nissan engines only, and its work on the Nissan L-series and later the RB and SR engines made its name. The company took the name Tomei Powered when it moved to Machida, Tokyo, in 1994.
Tomei now develops parts for many Japanese engines, Mitsubishi, Subaru and Toyota as well as Nissan: camshafts, valve train parts, pistons, connecting rods and crankshafts, complete engines, and exhaust systems such as its well-known Expreme titanium range.










