Part 2-UEM/ICON Elite Pistons. Component Observations
My pistons arrived on August 5, 2021. These are from the first production run of this stocking design for 572 CID B1 engines.
# IC433CAKTS.std part number with rings
1.355 Compression height, Published as -0.020 below stock 10.725 deck
Lateral gas porting on the top land, Top land 0.300" from top
Ring Set #: 4500JS8.005 0.043, 1/16, 3/16 ring pack:
- Top Ring Stainless steel with (CrN-PVD)
- 2nd Ring Ductile Iron Napier with Phosphate
- Oil Ring Stainless Steel Chrome
Trend Wrist pins Part No. G99029301854130, 0.185” wall, 176 grams.
5cc dome with -12cc valve reliefs. Effective volume of -6.5cc
Hard Anodized crown & top ring land
UltraWear M42 skirt coating

Before sending everything to the machine shop, here are my observations.
These are big valve reliefs; and should be plenty deep and large dia for whatever valves & cam you run.
Intake: 0.320 / 2.526 dia
Exhaust: 0.325 / 1.980 dia
My inexpensive scale shows about 603 grams for the piston alone, a little bit heavier than a custom machined for lightening.