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  • Subaru JE Pistons EJ257 TIME ATTACK "FSR - Piston Kit
subaru-je-pistons-ej257-time-attack-fsr-piston-kit
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Subaru JE Pistons EJ257 TIME ATTACK "FSR - Piston Kit

Price: $724.30

Select Size:

  • Bore
  • Engine Compression Ratio (CR)
  • Volume Dome CC
  • 99.5mm = 3.917in 8.5:1 -16.5
  • 99.5mm = 3.917in 9.5:1 -7
  • 99.75mm = 3.927in 8.5:1 -17
  • 99.75mm = 3.927in 9.5:1 -7.3
  • 100mm = 3.937in 8.5:1 -17.3
  • 100mm = 3.937in 9.5:1 -7.6

Weight: 0.01 lb

Sku: 291061

Weight:

SKU:



$724.30

  • Time Attack FSR Pistons now available!
  • 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.
  • Dome and dishes feature smooth flowing radii for excellent flame travel.
  • 1.2 x 1.2 x 2.5mm ring widths.
  • .905 x 2.250 straight wall carbon steel wrist pin provided.
  • Pin fitting and Tru Arc locks included
  • Rings Now Included

Ā 

Ā 

Part # Bore Oversize Stroke
(mm)		 Rod
(mm)		 C/D
(mm)		 Head CCs C/R With .040 Dome CCs Gram Footnote Skirt Included
Ring Set#
291061 99.5 STD 79 130.5 30.7 57 8.5:1 -16.5 407 T F JG4904-3917
310936 99.5 STD 79 130.5 30.7 57 9.5:1 -7 423 T,M F JG4904-3917
296348 99.75 0.25 79 130.5 30.7 57 8.5:1 -17 405 T F JG4904-3927
310937 99.75 0.25 79 130.5 30.7 57 9.5:1 -7.3 425 T F JG4904-3927
291062 100 0.5 79 130.5 30.7 57 8.5:1 -17.3 413 T F JG4904-3937
310938 100 0.5 79 130.5 30.7 57 9.5:1 -7.6 427 T,M F JG4904-3937

Ā 
Top Compression Ring Thickness 0.0480
Second Compression Ring Thickness 0.0480
Oil Ring Thickness 0.100
Forging Type FSR
Series JE Pistons
Piston Head Type Inv Dome/Dish
Pin Diameter (IN) 0.905
Make SUBARU
Wrist Pin Style - floating or press fit Floating
Wall Type STRAIGHT
Wall Thickness (IN) 0.180
Ringset Part Number JG4901-3917
Ring Brand ProSeal
Ringset Included Yes
Retainer Thickness 0.042
Retainer Lock Style Tru Arc Lock
Retainer Lock Part Number 905-042-CT
Retainer Diameter (IN) 0.905
Piston Pin Inside Diameter 0.545
EJ257Ā Piston Material 2618
Piston Pin Length (IN) 2.250
Piston Avg Wt 407
Pin Offset Yes
Pin Brand JE Pistons
Pin Part Number 905-2250-18-51S
Pin Included Yes
Pin Diameter (mm) 23.00
Oil Rail Support Included No
Deck Clearance -0.012
Brand JE Pistons