KB Hypereutectic SB Chevy Flat Top Lightweight Piston Set - 4.040" Bore - 3.480" Stroke - 5.700" Rod Length Helmet Air System Blower Wiring Harness Pro Series 10-micron fabric replacement

Pro Series 10-micron fabric replacement element

132g weight

20 AN Male to 16 AN Male O-Ring

563 x 2 in

040" copper tubing at 45°

KB Hypereutectic SB Chevy Flat Top Lightweight Piston Set - 4.040" Bore - 3.480" Stroke - 5.700" Rod Length Helmet Air System Blower Wiring Harness Pro Series 10-micron fabric replacementModern piston design locates the top ring higher for improved performance. a high top ring operates at higher temperatures and requires a larger top ring end gap. To find the proper ring end gap, multiply your bore size by the ring end gap factor listed on the chart (i. e. , Street Normally Aspirated 4. 000" bore x . 0065" gap factor = . 026" total top ring end gap). Your hypereutectic performance piston will expand less than typical cast or forged