ALL NEW 0.5mm OVERSIZED FORGED PISTONS

ALL NEW 0.5mm OVERSIZED FORGED PISTONS

All New
0.5mm OVERSIZED PISTONS!

Wide variety of applications
from overhaul to increasing displacement

We have recently added a new bore size to Tomei’s forged piston series, which has received very high praise from engine builders and engineers at tuning shops in Japan by RSE and around the world. The new bore size is oversized by 0.5mm. This is a smaller size compared to our current 1.0mm oversized lineup. For example, RB26’s standard bore size is 86.0mm, and Tomei’s current piston bore is 87.0mm. This time, we have added 86.5mm pistons, which are oversized by 0.5mm from stock. Due to the smaller bore, the displacement is slightly smaller at 2598.6cc for the 86.5mm model than the 87.0mm model’s 2628.7cc. Still, it is very difficult to obtain new cylinder blocks these days, so we have added 0.5mm oversized pistons for those who want to use the precious cylinder block with care and who wish to maintain block strength. Of course, those aiming for the ultimate power can still choose the larger bore of 87.0mmpistons. This time, Tomei would like to increase bore options and help engine builders realize the ultimate engine they are aiming for. At the same time as the piston kit, a new bore size has also been added to Tomei’s stroker kit. We hope that you will complete the ideal engine that suits your purpose and enjoy your car life further. 1

New Lineup

ENGINEBORE(mm)
[OEM]
COMPATIBLE
STROKE
PART NO.AVAILABLE
NISSAN
RB26DETT86.50
[+0.50]
STD/2.8LTA202A-NS05B
More details
End of June
SR20DET86.50
[+0.50]
2.2LTA202A-NS08C
More details
End of June
STDTA202A-NS08D
More details
End of July
TOYOTA
4A-G 16VALVE81.50
[+0.50]
1.8L To Be Announced
4A-G 20VALVE
2JZ-GTE86.50
[+0.50]
3.4LTA202A-TY03D
More details
End of July
3.6LTA202A-TY03E
More details
STDTA202A-TY03F
More details
MITSUBISHI
4G63 EVO1-985.50
[+0.50]
2.2/2.3LTA202A-MT01B
More details
Mid June
4B11 EVO1086.50
[+0.50]
2.3LTA202A-MT02B
More details
Mid June

Current Lineup

ENGINEBORE(mm)
[OEM]
COMPATIBLE
STROKE
PART NO.
NISSAN
VR38DETT95.50
[±0.0]
4.1LTA202A-NS01A
More details
RB26DETT
RB25DET
87.00
[+1.00]
2.6L/2.8LTA202A-NS05A
More details
SR20DET87.00
[+1.00]
2.2LTA202A-NS08A
More details
2.0LTA202A-NS08B
More details
TOYOTA
4A-G 16VALVE82.00
[+1.00]
1.8LTA202A-TY01AP
More details
4A-G 20VALVE1.8LTA202A-TY02AP
More details
2JZ-GTE87.00
[+1.00]
3.4LTA202A-TY03A
More details
3.6LTA202A-TY03B
More details
3.0LTA202A-TY03C
More details
SUBARU
EJ2599.75
[+0.25]
2.5L/2.6LTA202A-SB02A
More details
MITSUBISHI
4G63 EVO1-986.00
[+1.00]
2.2L/2.3LTA202A-MT01A
More details
4B11 EVO1087.00
[+1.00]
2.3LTA202A-MT02A
More details

VR38DETT (4.1)

RB26DETT (2.6/2.8)

SR20DET (2.2)

SR20DET (2.0)

4A-G 16VALVE (1.8)

4A-G 20VALVE (1.8)

2JZ-GTE (3.4)

2JZ-GTE (3.6)

2JZ-GTE (3.0)

EJ25 (2.5/2.6)

4G63 (2.2/2.3)

4B11 (2.3)

TOMEI FORGED PISTON FEATURES

Forging Material Exclusive For Each Model

3D Profile

Compatible With 1mm Oversized Valves

Designed For Thin Piston Rings

New stroker kits with 0.5mm oversized piston are now available

ENGINETYPEBORE(mm)
[OEM]
CRANKSHAFTPART NO.
NISSAN
RB26DETT
RB25DET
2.886.50
[+0.50]
8 COUNTERTA201A-NS05D
More details
FULL COUNTERTA201A-NS05E
More details
2.6FULL COUNTERTA201A-NS05F
More details
SR20DET2.286.50
[+0.50]
FULL COUNTERTA201A-NS08B
More details
TOYOTA
2JZ-GTE3.486.50
[+0.50]
FULL COUNTERTA201A-TY03C
More details
3.6TA201A-TY03D
More details
MITSUBISHI
4G63 EVO1-92.285.50
[+0.50]
FULL COUNTERTA201A-MT01C
More details
2.3TA201A-MT01D
More details
4B11 EVO102.386.50
[+0.50]
FULL COUNTERTA201A-MT02B
More details

RB26DETT/RB25DET 2.8 8 COUNTER

RB26DETT/RB25DET 2.8 FULL COUNTER

RB26DETT/RB25DET 2.6 FULL COUNTER

SR20DET 2.2

2JZ-GTE 3.4

2JZ-GTE 3.6

4G63 EVO1-9 2.2

4G63 EVO1-9 2.3

4B11 EVO10 2.3

CYLINDER BLOCK RELATED PRODUCTS

ENGINECATEGORYSPEC [OEM]PART NO.
NISSAN
VR38DETTSTROKER KIT4.1LTOMEI BORE: 95.50mm [+-0.00]TA201A-NS01A
PISTONfor 4.1LTOMEI BORE: 95.50mm [+-0.00]
CH 31.20mm [+-0.00]
TA202A-NS01A
CON-RODfor 4.1L165.10mm [+-0.00]TA203A-NS01A
CRANKSHAFTfor 4.1L94.40mm [+6.00]TA204D-NS01A
VQ35HRCON-RODfor 3.5L(STD)151.80mm [+-0.00]TA203A-NS03A
VQ35DECON-RODfor 3.5L(STD)144.20mm [+-0.00]TA203A-NS04A
RB26DETTSTROKER KIT2.8L 8-C.W.TOMEI BORE: 87.00mm [+1.00]TA201A-NS05A
CP BORE 87.00mm [+1.00]TA201A-NS05AP
TOMEI BORE: 86.50mm [+0.50]TA201A-NS05D
2.8L Full-C.W.TOMEI BORE: 87.00mm [+1.00]TA201A-NS05B
CP BORE 87.00mm [+1.00]TA201A-NS05BP
TOMEI BORE: 86.50mm [+0.50]TA201A-NS05E
2.6L(STD) Full-C.W.TOMEI BORE: 87.00mm [+1.00]TA201A-NS05C
CP BORE 87.00mm [+1.00]TA201A-NS05CP
TOMEI BORE: 86.50mm [+0.50]TA201A-NS05F
PISTONfor 2.6L(STD)/2.8LTOMEI BORE: 87.00mm [+1.00]
CH 30.00mm [+-0.00]
TA202A-NS05A
CP BORE 87.00mm [+1.00]
CH 30.00mm [+-0.00]
TA202A-NS05AP
TOMEI BORE: 86.50mm [+0.50]
CH 30.00mm [+-0.00]
TA202A-NS05B
CON-RODfor 2.6L(STD)121.50mm [+-0.00]TA203A-NS05A
for 2.8L119.50mm [-2.00]TA203A-NS05B
CRANKSHAFTfor 2.6L(STD)Full-C.W. 73.70mm [+-0.00]TA204B-NS05A
for 2.8LFull-C.W. 77.70mm [+4.00]TA204B-NS05B
8-C.W. 77.70mm [+4.00]TA204C-NS05A
RB25DETSTROKER KIT2.8L 8-C.W.TOMEI BORE: 87.00mm [+1.00]TA201A-NS05A
CP BORE 87.00mm [+1.00]TA201A-NS05AP
TOMEI BORE: 86.50mm [+0.50]TA201A-NS05D
2.8L Full-C.W.TOMEI BORE: 87.00mm [+1.00]TA201A-NS05B
CP BORE 87.00mm [+1.00]TA201A-NS05BP
TOMEI BORE: 86.50mm [+0.50]TA201A-NS05E
2.6L(STD) Full-C.W.TOMEI BORE: 87.00mm [+1.00]TA201A-NS05C
CP BORE 87.00mm [+1.00]TA201A-NS05CP
TOMEI BORE: 86.50mm [+0.50]TA201A-NS05F
PISTONfor 2.6L(STD)/2.8LTOMEI BORE: 87.00mm [+1.00]
CH 30.00mm [+-0.00]
TA202A-NS05A
CP BORE 87.00mm [+1.00]
CH 30.00mm [+-0.00]
TA202A-NS05AP
TOMEI BORE: 86.50mm [+0.50]
CH 30.00mm [+-0.00]
TA202A-NS05B
CON-RODfor 2.5L(STD)/2.6L121.50mm [+-0.00]TA203A-NS05A
for 2.8L119.50mm [-2.00]TA203A-NS05B
CRANKSHAFTfor 2.6LFull-C.W. 73.70mm [+-0.00]TA204B-NS05A
for 2.8LFull-C.W. 77.70mm [+4.00]TA204B-NS05B
8-C.W. 77.70mm [+4.00]TA204C-NS05A
RB25DE(T) NEO6CON-RODfor 2.5L(STD)121.50mm [+-0.00]TA203A-NS05A
RB25DECON-RODfor 2.5L(STD)121.50mm [+-0.00]TA203A-NS05A
SR20DETSTROKER KIT2.2LTOMEI BORE: 87.00mm [+1.00]TA201A-NS08A
TOMEI BORE: 86.50mm [+0.50]TA201A-NS08B
PISTONfor 2.2LTOMEI BORE: 87.00mm [+1.00]
CH 29.50mm [-2.50]
TA202A-NS08A
TOMEI BORE: 86.50mm [+0.50]
CH 29.50mm [-2.50]
TA202A-NS08C
for 2.0L(STD)TOMEI BORE: 87.00mm [+1.00]
CH 32.00mm [+-0.00]
TA202A-NS08B
TOMEI BORE: 86.50mm [+0.50]
CH 32.00mm [+-0.00]
TA202A-NS08D
CON-RODfor 2.0L(STD)/2.2L136.30mm [+-0.00]TA203A-NS08A
CRANKSHAFTfor 2.2LFull-C.W. 91.00mm [+5.00]TA204B-NS08A
SR20DE
SR18DE
CON-RODfor 2.0L(STD)/1.8L(STD)136.30mm [+-0.00]TA203A-NS08A
KA24DECON-RODfor 2.4L(STD)165.00mm [+-0.00]TA203A-NS16A
TOYOTA
4A-G 16VALVESTROKER KIT1.8LCP BORE: 82.00mm [+1.00]TA201A-TY01AP
PISTONfor 1.8LCP BORE: 82.00mm [+1.00]
CH 27.70mm [-3.00]
TA202A-TY01AP
CON-RODfor 1.6L(STD)/1.8L122.00mm [+-0.00]TA203A-TY01A
CRANKSHAFTfor 1.8LFull-C.W. 83.00mm [+6.00]TA204B-TY01A
4A-G 20VALVESTROKER KIT1.8LBORE: 82.00mm [+1.00]TA201A-TY02AP
PISTONfor 1.8LCP BORE: 82.00mm [+1.00]
CH 27.70mm [-3.00]
TA202A-TY02AP
CON-RODfor 1.6L(STD)/1.8L122.00mm [+-0.00]TA203A-TY01A
CRANKSHAFTfor 1.8LFull-C.W. 83.00mm [+6.00]TA204B-TY01A
2JZ-GTESTROKER KIT3.4LTOMEI BORE: 87.00mm [+1.00]TA201A-TY03A
CP BORE: 87.00mm [+1.00]TA201A-TY03AP
TOMEI BORE: 86.50mm [+0.50]TA201A-TY03C
3.6LTOMEI BORE: 87.00mm [+1.00]TA201A-TY03B
CP BORE: 87.00mm [+1.00]TA201A-TY03BP
TOMEI BORE: 86.50mm [+0.50]TA201A-TY03D
PISTONfor 3.4LTOMEI BORE: 87.00mm [+1.00]
CH 30.00mm [-4.00]
TA202A-TY03A
CP BORE: 87.00mm [+1.00]
CH 30.00mm [-4.00]
TA202A-TY03AP
TOMEI BORE: 86.50mm [+0.50]
CH 30.00mm [-4.00]
TA202A-TY03D
for 3.6LTOMEI BORE: 87.00mm [+1.00]
CH 29.50mm [-4.50]
TA202A-TY03B
CP BORE: 87.00mm [+1.00]
CH 29.50mm [-4.50]
TA202A-TY03BP
TOMEI BORE: 86.50mm [+0.50]
CH 29.50 mm[-4.50]
TA202A-TY03E
for 3.0L(STD)TOMEI BORE: 87.00mm [+1.00]
CH 34.00mm [+-0.00]
TA202A-TY03C
TOMEI BORE: 86.5mm [+0.50]
CH 34.00mm [+-0.00]
TA202A-TY03F
CON-RODfor 3.0L(STD)/3.4L142.00mm [+-0.00]TA203A-TY03A
for 3.6L139.00mm [-3.00]TA203A-TY03B
CRANKSHAFTfor 3.4LFull-C.W. 94.00mm [+8.00]TA204B-TY03A
CRANKSHAFTfor 3.6LFull-C.W. 100.0mm [+14.00]TA204B-TY03B
1JZ-GTECON-RODfor 2.5L(STD)125.25mm [+-0.00]TA203A-TY04A
SUBARU
EJ25STROKER KIT2.6LTOMEI BORE: 99.75mm [+0.25]TA201A-SB02A
CP BORE: 99.75mm [+0.25]TA201A-SB02AP
PISTONfor 2.5L(STD)/2.6LTOMEI BORE: 99.75mm [+0.25]
CH30.70mm [+-0.00]
TA202A-SB02A
CP BORE: 99.75mm [+0.25]
CH30.70mm [+-0.00]
TA202A-SB02AP
CON-RODfor 2.6L127.80mm [-2.70]TA203A-SB02A
for 2.5L(STD)130.50mm [+-0.00]TA203A-SB01A
CRANKSHAFTfor 2.6LFull-C.W. 83.00mm [+4.00]TA204B-SB02A
EJ20CON-RODfor 2.0L(STD)130.50mm [+-0.00]TA203A-SB01A
MITSUBISHI
4G63STROKER KIT2.2LTOMEI BORE:86.00mm [+1.00]TA201A-MT01A
CP BORE:86.00mm [+1.00]TA201A-MT01AP
TOMEI BORE:85.50mm [+0.50]TA201A-MT01C
2.3LTOMEI BORE:86.00mm [+1.00]TA201A-MT01B
CP BORE:86.00mm [+1.00]TA201A-MT01BP
TOMEI BORE:85.50mm [+0.50]TA201A-MT01D
PISTONfor 2.2L/2.3LTOMEI BORE:86.00mm [+1.00]
CH 31.65mm[-3.35]
TA202A-MT01A
CP BORE:86.00mm [+1.00]
CH 31.65mm [-3.35]
TA202A-MT01AP
TOMEI BORE:85.50mm [+0.50]
CH 31.65mm[-3.35]
TA202A-MT01B
CON-RODfor 2.0L(STD)/2.2L150.00mm [+-0.00]TA203A-MT01A
for 2.3L147.00mm [-3.00]TA203A-MT01B
CRANKSHAFTfor 2.2LFull-C.W. 94.00mm [+6.00]TA204B-MT01A
for 2.3LFull-C.W. 100.00mm [+12.00]TA204B-MT01B
4B11STROKER KIT2.3LTOMEI BORE: 87.00mm [+1.00]TA201A-MT02A
CP BORE: 87.00mm [+1.00]TA201A-MT02AP
TOMEI BORE: 86.50mm [+0.50]TA201A-MT02B
PISTONfor 2.3LTOMEI BORE: 87.00mm [+1.00]
CH 27.40mm [-6.00]
TA202A-MT02A
CP BORE: 87.00mm [+1.00]
CH 27.40mm [-6.00]
TA202A-MT02AP
TOMEI BORE: 86.50mm [+0.50]
CH 27.40mm [-6.00]
TA202A-MT02B
CON-RODfor 2.0L(STD)/2.3L143.75mm [+-0.00]TA202A-MT02B
CRANKSHAFTfor 2.3LFull-C.W. 98.00mm [+12.00]TA204B-MT02A