Defric coating (Lubricous film) is applied to the piston skirt, for a reduction in friction and loads as well as improved durability.
4B11 Forged Piston KIT
Engine type
4B11 for EVO X
Part No.
13020-4B1-100
13030-4B1-100
Price (set)
¥108,000
Bore×Stroke *4
ø86.50×86mm
ø87.00×86mm
Displacement
2022cc
2045cc
Crown Volume *1
-5.8cc/-5.8cc
Projection Height *2
±0mm
Reference C/R *3,
Standard head GK 87.0mm t=1.0mm
ξ≈9.1:1
TODA head GK 88.0mm t=1.0mm
ξ≈9.2:1
*1:Crown volume is measured "from the piston shoulder"/"from the deck of the block".
*2:Piston shoulder height is measured from the deck of the block.
*3:The compression ratios given above are only to be taken as a guide, measurements are required.
*4:Standard stroke.
