KB Hypereutectic SB Chevy Flat Top Piston Set - 4.030" Bore - 3.750" Stroke - 6.000" Rod Length 4240RD Ignition Plug and Play with

Ignition Plug and Play with GM 24x and 58x LSx engines

Hydraulic Adjustment

50 inch tailpipes for maximum performance

May not fit models with a body lift or transmission/ transfer case drop

5 wide paddle blades pull large volumes of air for maximum heat extraction

KB Hypereutectic SB Chevy Flat Top Piston Set - 4.030" Bore - 3.750" Stroke - 6.000" Rod Length 4240RD Ignition Plug and Play withModern 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