These are Probe 4.6 STROKER Pistons. They are designed to fit with our stroker crank of 3.750" stroke and OEM sized connecting rods of 5.933" length with .866" stock sized pins. These are the 21cc Dish Volume version. FOR YOUR COMPRESSION RATIO WITH THESE PISTONS PLEASE SEE THE CHART BELOW

• 2618-t6 forged aluminum

• Lightweight

• Tight running clearance (.002 to .006)

• Weight matched (+/- 2.5 grams)

• Finished diameters +/- .00005

• fits all cylinder heads

• Offset wrist pins for quiet operation

COMPRESSION RATIOS	2V NON PI	2V PI	4V ALL
21cc Dished with STROKER 4.6	8.58:1	9.19:1	8.68:1