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Subaru JE Pistons EJ257 BILLET FSR - Piston Kit

Price: $1,485.04

Select Size:

  • Bore
  • Engine Compression Ratio (CR)
  • Volume Dome CC
  • 99.50mm = 3.917in 8.8:1 -14.1
  • 100.0mm = 3.937in 8.8:1 -15.1

Weight: 0.01 lb

Sku: 310927

Weight:

SKU:



$1,485.04


  • 100% CNC machined billet piston
  • Specifically designed for high horsepower Subaru racing engines up to 1200hp
  • Only 392 grams! Up to 32 grams lighter than other aftermarket pistons
  • Manufactured from high quality, certified 2618-T6 aluminum alloy
  • Internal and external strut braces
  • Premium 9310 steel wrist pins included (.905 x 2.250"), DLC upgrade available
  • JE Pro Seal Piston Rings Included (1.2, 1.2, 2.5mm)
  • Tru Arc locks for easy installation

 

 

art # Bore Oversize Stroke
(mm)
Rod
(mm)
C/D
(mm)
Head CCs C/R With .040 Dome CCs Gram Footnote Skirt Included
Ring Set#
310927 99.5 STD 79 130.5 30.7 57 8.8:1 -14.1 NEW T,M FSR JG4904-3917
286463 100 0.5 79 130.5 30.7 57 8.8:1 -15.1 392 T,M FSR JG4904-3937

 

 

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) 0.866
Make SUBARU
Wrist Pin Style - floating or press fit Floating
Wall Type CHAMFERED
Wall Thickness (IN) 0.150
Ringset Part Number JG4904-3917
Ring Brand ProSeal
Ringset Included No
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 0.566
Piston Material 2618
Piston Pin Length (IN) 2.050
Piston Avg Wt 392
Pin Offset Yes
Pin Brand JE Pistons
Pin Part Number 866-2050-15-93C
Pin Included Yes
Pin Diameter (mm) 22.00
Oil Rail Support Included No
Deck Clearance -0.012
Brand JE Pistons