KB Hypereutectic Flat Top Pistons - SB Ford 289 - 5.155" Rod Length, .030" Over Bore Size 01-1630 Ford Compact SUV 2020-21

Ford Compact SUV 2020-21

Each Spring Individually Tested and RatedEibach has been committed to creating the finest race springs in the world for over two decades

Sold Separately: Mounting Bracket: P/N 11706 Cog Pulley: P/N 21109

The one-piece sealed housing is used to eliminate the use of multiple components and ensure the coolest air intake charge available

We have an assortment of premium quality stainless steel and black oxide finish 8740 chrome moly bolts for the most popular applications

KB Hypereutectic Flat Top Pistons - SB Ford 289 - 5.155" Rod Length, .030" Over Bore Size 01-1630 Ford Compact SUV 2020-21Modern 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