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RPM - RON'S PRECISION MACHINE, INC.
69 E. 580 N.
Santaquin, Utah 84655
1-801-754-5338 or Toll free 1-866-700-5877
Contact us anytime 24-7

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Mitsubishi Forged Pistons & Rings

Call toll free to purchase at: 1-866-700-5877

1990-2001 MITSUBISHI - 6G72 DOHC 24V

  • Dish requires no deburring or preparation
  • 2618 T6 high tensile forged aluminum
  • JE designs are specifically engineered for extreme applications up. to, and including, professional competition. In this environment, the higher compression ratios, highest boost or heavy nitrous usage necessitate the higher tensile strength 2618 aluminum alloy.

1990-2001 MITSUBISHI - 6G72 DOHC 24V Std Bore: 91.1mm

Part #
Your Cost

Bore

Oversize

Stroke (mm)

Rod (mm)

C/D (mm)

Head CC's

C/R With .040

Dome CC's

Gram

Footnote

Skirt

Included Ring Set#

321330 $1,374.00

91.1

STD

76

141

31.5

43

8.0:1

-15.5

Call

T,M

F

JC2206-3587 $184.47

321333 $1,374.00

91.1

STD

76

141

31.5

43

9.0:1

-6.5

Call

T,M

F

JC2206-3587 $184.47

321331 $1,374.00

91.5

0.4

76

141

31.5

43

8.0:1

-15.8

Call

T,M

F

JG1006-3602 $220.84

321334 $1,374.00

91.5

0.4

76

141

31.5

43

9.0:1

-6.9

Call

T,M

F

JG1006-3602 $220.84

321332 $1,374.00

92.0

0.9

76

141

31.5

43

8.0:1

-16.5

Call

T,M

F

JG1006-3622 $220.84

321335 $1,374.00

92.0

0.9

76

141

31.5

43

9.0:1

-7.5

Call

T,M

F

JG1006-3622 $220.84

Foor Notes:
F FSR (Forged Side Relief)
G Stock Block Must Be Re-Sleeved
L Limited Availability
M Made To Order
N Must sleeve block
R Full Round Skirt
T Accepts Turbo and Nitrous
U Not Designed for use with Turbo or Nitrous
V Accepts Nitrous 


MITSUBISHI 1993-99 ECLIPSE / TALON 4G63 22MM PIN









  • Crown requires no deburring or preparation
  • 2618 T6 high tensile forged aluminum
  • NEW ASYMMETRICAL FSR forging! State of the art asymmetrical skirt technology reduces friction and mass while providing a more rigid and durable platform (Skirt Style F).
  • In this environment, higher boost levels or heavy nitrous usage necessitate JE's wrought 2618 alloy.
  • FSR pistons include offset pins for quiet operation.
  • Dished pistons feature new Smooth Finished Crown process for excellent flame travel.
  • 1.0 x 1.2 x 2.8mm ring widths
  • .866 x 2.250 straight wall carbon steel wrist pin provided.
  • Pin fitting and wire locks included
  • Part numbers 289311, 289312 $743.60 and 289313 $714.99 are excellent for E85 fueled engines (Skirt Style R)
  • Will not fit 1999-2007 Mitsubishi Evolution engines

MITSUBISHI 1993-99 ECLIPSE / TALON 4G63 22MM PIN - NEW ASYMMETRICAL FSR
*** Stroker applications optimized for 750hp or less when combined with upgraded pins. For power levels above this,
please call so we can build a piston to suit your needs!***

Part #

Bore

Over
size

Stroke
(mm)

Rod
(mm)

C/D
(mm)

Head CC's

C/R
With
.040

Dome
CC's

Gram

Foot
note

Skirt

Included Ring Set#

297506 $916.37

85.5

0.50

100

150

28.7

47.0

8.5:1

-22.0

276

T

F

JG1004-3366 $146.84

297507 $916.37

86.0

1.00

100

150

28.7

47.0

8.5:1

-23.3

278

T

F

JG1004-3386 $146.84

302951 $882.65

85.0

STD

88

150

34.72

47.0

10.0:1

-2.1

313

T

F

JG1004-3346 $146.84

297511 $916.37

85.5

0.50

88

150

34.72

47.0

8.5:1

-13.2

311

T

F

JG1004-3366 $146.84

302952 $882.65

85.5

.50

88

150

34.72

47.0

10.0:1

-2.1

315

T

F

JG1004-3366 $146.84

297512 $916.37

86.0

1.00

88

150

34.72

47.0

8.5:1

-14.0

313

T

F

JG1004-3386 $146.84

302953 $882.65

86.0

1.00

88

150

34.72

47.0

10.0:1

-2.1

317

T

F

JG1004-3386 $146.84



TRADITIONAL FULL ROUND - PART #'S 208477 $916.37 & 254006 $742.24 USE 1.2, 1.5, 3.0mm RING PKG

Part #

Bore

Over
size

Stroke
(mm)

Rod
(mm)

C/D
(mm)

Head CC's

C/R
With
.040

Dome
CC's

Gram

Foot
note

Skirt

Included Ring Set#

270666 $916.37

85.5

0.5

100

150

28.7

47

8.5:1

-22.0

285

T

R

JG1004-3366 $146.84

270667 $916.37

86.0

1.0

100

150

28.7

47

8.5:1

-23.3

286

T

R

JG1004-3386 $146.84

208477 $916.37

85.5

0.5

88

150

34.72

47

8.5:1

-13.2

316

T

R

JG2704-3366 $146.84

254006 $742.24

86.0

1.0

88

150

34.72

47

8.5:1

-14.0

319

T

R

JG2804-3386 $146.84

Foor Notes:
F FSR (Forged Side Relief)
G Stock Block Must Be Re-Sleeved
L Limited Availability
M Made To Order
N Must sleeve block
R Full Round Skirt
T Accepts Turbo and Nitrous
U Not Designed for use with Turbo or Nitrous
V Accepts Nitrous 

MITSUBISHI 2007-UP EVO X 4B11T









  • Crown requires no deburring or preparation
  • 2618 T6 high tensile forged aluminum
  • NEW ASYMMETRICAL FSR forging! State of the art asymmetrical skirt technology reduces friction and mass while providing a more rigid and durable platform (Skirt Style F).
  • In this environment, higher boost levels or heavy nitrous usage necessitate JE's wrought 2618 alloy.
  • FSR pistons include offset pins for quiet operation.
  • Dished pistons feature new Smooth Finished Crown process for excellent flame travel.
  • 1.0 x 1.2 x 2.8mm ring widths
  • .905 x 2.250 straight wall carbon steel wrist pin provided.
  • Pin fitting, rings and wire locks included

2007-UP EVO X 4B11T - Ultra SERIES Ultra Series Includes: Grain Flow Optimized Forging Lateral Gas Ports
Ceramic Crown Coating Perfect Skirt Coating Accumulator Groove Double Pin Oiling
Upgraded 9310 Pins and locks Carbon Steel Nitride Rings Included

Part #

Bore

Over
size

Stroke
(mm)

Rod
(mm)

C/D
(mm)

Head CC's

C/R
With
.040

Dome
CC's

Gram

Foot
note

Skirt

Included Ring Set#

361295 $1,132.12

86.00

STD

86

143.75

33.35

50.5

10.0:1

1.4

371

Ultra

F

JG1004-3386 $146.84

361296 $1,132.12

86.50

0.50

86

143.75

33.35

50.5

10.0:1

0.8

373

Ultra

F

JG1004-3405 $146.84

361297 $1,132.12

87.00

1.00

86

143.75

33.35

50.5

10.0:1

0.2

376

Ultra

F

JG1004-3425 $146.84


2007-UP EVO X 4B11T - NEW ASYMMETRICAL FSR ***
NOTE *** Oil squirter modification needed for Asymmetrical FSR. Squirter can be bent or locating pin removed for clearance.
Please make sure to check Rod to Oil Squirter clearance when relocating oil squirter.

Part #

Bore

Over
size

Stroke
(mm)

Rod
(mm)

C/D
(mm)

Head CC's

C/R
With
.040

Dome
CC's

Gram

Foot
note

Skirt

Included Ring Set#

296904 $916.37

86.0

STD

86

143.75

33.35

50.5

9.0:1

-5.5

320

T

F

JG1004-3386 $146.84

317840 $916.37

86.0

STD

86

143.75

33.35

50.5

10.0:1

1.4

338

T

F

JG1004-3386 $146.84

361293 $916.37

86.25

0.25

86

143.75

33.35

50.5

9.0:1

-5.8

322

T

F

JG1004-3396 $146.84

361294 $916.37

86.25

0.25

86

143.75

33.35

50.5

10.0:1

1.1

340

T

F

JG1004-3396 $146.84

296905 $916.37

86.5

0.5

86

143.75

33.35

50.5

9.0:1

-6.2

324

T

F

JG1004-3405 $146.84

317841 $916.37

86.5

0.5

86

143.75

33.35

50.5

10.0:1

0.8

342

T

F

JG1004-3405 $146.84

317836 $916.37

87.0

1.0

86

143.75

33.35

50.5

9.0:1

-6.8

328

T

F

JG1004-3425 $146.84

317842 $916.37

87.0

1.0

86

143.75

33.35

50.5

10.0:1

0.2

348

T

F

JG1004-3425 $146.84

317837 $916.37

88.0

2.0

86

143.75

33.35

50.5

9.0:1

-8.8

336

T

F

JG1004-3465 $146.84

317843 $916.37

88.0

2.0

86

143.75

33.35

50.5

10.0:1

-1.0

354

T

F

JG1004-3465 $146.84

317839 $916.37

89.0

3.0

86

143.75

33.35

50.5

9.0:1

-9.5

350

T

F

JG1004-3504 $146.84

317844 $916.37

89.0

3.0

86

143.75

33.35

50.5

10.0:1

-2.1

360

T

F

JG1004-3504 $146.84

317838 $916.37

90.0

4.0

86

143.75

33.35

50.5

9.0:1

-10.9

344

T

F

JG1004-3543 $146.84

317845 $916.37

90.0

4.0

86

143.75

33.35

50.5

10.0:1

-3.3

366

T

F

JG1004-3543 $146.84

Foor Notes:
F FSR (Forged Side Relief)
G Stock Block Must Be Re-Sleeved
L Limited Availability
M Made To Order
N Must sleeve block
R Full Round Skirt
T Accepts Turbo and Nitrous
U Not Designed for use with Turbo or Nitrous
V Accepts Nitrous 
MITSUBISHI 1999-2007 EVOLUTION VI - IX / 4G63 22MM PIN









  • Crown requires no deburring or preparation
  • 2618 T6 high tensile forged aluminum
  • NEW ASYMMETRICAL FSR forging! State of the art asymmetrical skirt technology reduces friction and mass while providing a more rigid and durable platform (Skirt Style F).
  • In this environment, higher boost levels or heavy nitrous usage necessitate JE's wrought 2618 alloy.
  • FSR pistons include offset pins for quiet operation.
  • Dished pistons feature new Smooth Finished Crown process for excellent flame travel.
  • 1.0 x 1.2 x 2.8mm ring widths
  • .866 x 2.250 straight wall carbon steel wrist pin provided.
  • Pin fitting and wire locks included
  • Part numbers 208477 $916.37 & 254006 $742.24 have 1.2, 1.5, 3.0mm Ring Pkg (Skirt Style R)



MITSUBISHI 1999-2007 EVOLUTION VI - IX / 4G63 22MM PIN - Ultra SERIES
Ultra Series Includes: Grain Flow Optimized Forging Lateral Gas Ports Ceramic Crown Coating
Perfect Skirt Coating Accumulator Groove Double Pin Oiling Upgraded 9310 Pins and locks Carbon Steel Nitride Rings

Part #

Bore

Over
size

Stroke
(mm)

Rod
(mm)

C/D
(mm)

Head CC's

C/R
With
.040

Dome
CC's

Gram

Foot
note

Skirt

Included Ring Set#

361290 $1,132.12

85.00

STD

100

150

28.7

43.5

10.0:1

-12.5

287

Ultra

F

JG1004-3346 $146.84

361291 $1,132.12

85.50

0.50

100

150

28.7

43.5

10.0:1

-13.2

289

Ultra

F

JG1004-3366 $146.84

361292 $1,132.12

86.00

1.00

100

150

28.7

43.5

10.0:1

-13.9

293

Ultra

F

JG1004-3386 $146.84

361287 $1,132.12

85.00

STD

88

150

34.7

43.5

10.0:1

-5.0

324

Ultra

F

JG1004-3346 $146.84

361288 $1,132.12

85.50

0.50

88

150

34.7

43.5

10.0:1

-5.0

326

Ultra

F

JG1004-3366 $146.84

361289 $1,132.12

86.00

1.00

88

150

34.7

43.5

10.0:1

-6.0

330

Ultra

F

JG1004-3386 $146.84


MITSUBISHI 1999-2007 EVOLUTION VI - IX / 4G63 22MM PIN - ASYMMETRICAL
*** Stroker applications optimized for 750hp or less when combined with upgraded pins.
For power levels above this, please call so we can build a piston to suit your needs!***

Part #

Bore

Over
size

Stroke
(mm)

Rod
(mm)

C/D
(mm)

Head CC's

C/R
With
.040

Dome
CC's

Gram

Foot
note

Skirt

Included Ring Set#

297047 $916.37

85.0

STD

100

150

28.7

43.5

9.0:1

-21.7

268

T

F

JG1004-3346 $146.84

297048 $916.37

85.5

0.5

100

150

28.7

43.5

9.0:1

-22.0

272

T

F

JG1004-3366 $146.84

297049 $916.37

86.0

1.0

100

150

28.7

43.5

9.0:1

-23.3

283

T

F

JG1004-3386 $146.84

297478 $916.37

85.0

STD

94

150

31.7

43.5

9.0:1

-17.1

293

T,M

F

JG1004-3346 $146.84

297479 $916.37

85.5

0.5

94

150

31.7

43.5

9.0:1

-17.9

296

T

F

JG1004-3366 $146.84

297480 $916.37

86.0

1.0

94

150

31.7

43.5

9.0:1

-18.6

299

T

F

JG1004-3386 $146.84

297050 $916.37

85.0

STD

88

150

34.7

43.5

9.0:1

-12.5

303

T

F

JG1004-3346 $146.84

297007 $882.65

85.0

STD

88

150

34.7

43.5

10.5:1/FT

-2.1 / FT

313

T

F

JG1004-3346 $146.84

297051 $916.37

85.5

0.5

88

150

34.7

43.5

9.0:1

-13.3

306

T

F

JG1004-3366 $146.84

297008 $882.65

85.5

0.5

88

150

34.7

43.5

10.5:1/FT

-2.1 / FT

315

T

F

JG1004-3366 $146.84

297052 $916.37

86.0

1.0

88

150

34.7

43.5

9.0:1

-14.0

309

T

F

JG1004-3386 $146.84

297009 $882.65

86.0

1.0

88

150

34.7

43.5

10.5:1/FT

-2.1 / FT

317

T,M

F

JG1004-3386 $146.84



TRADITIONAL FULL ROUND SERIES - 208477 $916.37 & 254006 $742.24 USE 1.2, 1.5, 3.0mm RING PKG

Part #

Bore

Over
size

Stroke
(mm)

Rod
(mm)

C/D
(mm)

Head CC's

C/R
With
.040

Dome
CC's

Gram

Foot
note

Skirt

Included Ring Set#

270666 $916.37

85.5

0.5

100

150

28.7

43.5

9.0:1

-22.0

285

T,M

R

JG1004-3366 $146.84

270667 $916.37

86.0

1.0

100

150

28.7

43.5

9.0:1

-23.3

286

T,M

R

JG1004-3386 $146.84

208477 $916.37

85.5

0.5

88

150

34.7

43.5

9.0:1

-13.3

316

T,M

R

JG2704-3366 $146.84

254006 $742.24

86.0

1.0

88

150

34.7

43.5

9.0:1

-14.0

319

T,M

R

JG2804-3386 $146.84

Foor Notes:
F FSR (Forged Side Relief)
G Stock Block Must Be Re-Sleeved
L Limited Availability
M Made To Order
N Must sleeve block
R Full Round Skirt
T Accepts Turbo and Nitrous
U Not Designed for use with Turbo or Nitrous
V Accepts Nitrous 

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