Manual

CAUTION
■ This product has been designed for competition use only and is not to be used on any public roads.
■This product is to be fitted by an experienced professional in a fully equipped workshop.
■This product was specifically designed for the vehicle application as stated above. This is not designed and may
not be suitable for other cars/engines other than stated in this manual. If this product/kit is installed on any
other vehicles/engines it may damage this product and /or the engine /vehicle that it is fitted to.
■ Please do not use high force when removing parts, as you may cause damage.
■This product is to be fitted with the correct tools, protective & safety equipement. Failure to do so can lead to
possible work hazards.
■ Check that everything has been tightened to the correct torque specifications.
■ Check for any signs of oil leaks and the amount of engine oil in the engine before driving the car.
When there's insufficient engine oil, the engine will have terminal failure.
WARNING
■ This product is to be installed when the engine and engine bay is cold.
■ Please be sure that all parts are fitted correctly to avoid any possible fire risk hazards.
SPECIFICATIONS
RB26DETT
RB28
/
2770
ENGINE
BORE
DIA.
(Φ)
PART
NUMBER
COMPRESSIO
N
PISTON
HEIGHT PIN DIA.
(mm) (Φ)
DISPLACEME
NT
(cc)
CROWN
RB26/2628
VOLUME
(cc)
86.5 1121865111
30.00
21
RB26/2597
-13.70
RB28/2738
87.0 1121870111
RB26/2628
RB28/2770
86.5 1121865112
RB26/2597
-12.70
RB28/2738
87.0 1121870112
MODEL
Without
Valve
Recess
With
Valve
Recess
RB25DET
SR20DET
SR20DE
VG30DET(T)
CA18DET
4G63
EJ25
EJ20
4AG
2JZ
※ The RB25DE(T) NEO straight 6 engines compression ratio rises when using the RB26 or RB25 pistons, due to
the nature of the combustion chamber design being small. So be sure to check the Pistons during assembly,
as you may need to have the top of the Piston crown machined to adjust the compression ratio.
※ When you install the Tomei 4G63 Pistons with the stock conrods, you'll have to use the "Full Floating
Bushing" on the small ends.
99.75 1182997312 30.70 23
EJ25/2468
EJ26/2593
+19.50
31.00 23 2123 +18.4092.5 1181925312
81.5
85.5 1152855212
87.0 1134870212
87.5 1134875212
89.0 1143890212
RB28/2770
31.00 2556
86.0 1152860212
85.5 1151855212
86.0 1151860212
87.0 1132870211
87.0 1113870111
86.5 1131865211
87.0 1131870211
86.5 1132865211
29.50
2138
+18.00
2163
2163
-3.50
2188
-12.70
84.0 1141840012
22
2021
+14.00
2044
32.00 3097 +14.00
30.00 20 1852 +3.30
34.65
22
2020
+16.00
2044
31.65
2158
+20.50
2183
1163815012
30.50 20
1605
-6.25
82.0 1163820012 1625
86.5 1162865212
34.00 22
3032
+14.10
87.0 1162870212 3067
SR22
4G63-
22/23
EJ25/26
EJ22