KB Hypereutectic SB Chevy Dished Piston Set - 4.155" Bore - 3.750" Stroke - 5.700" Rod Length BR10032 ButlerBuilt Front Axle Tether System

ButlerBuilt Front Axle Tether System is approved for use with World Of Outlaws and at Knoxville Raceway

this system includes all necessary parts

USE WITH BBK 70MM THROTTLE BODY PART 1501 INCLUDES NEW GASKETS

Cloyes Timing Chain Sets

12 AN Female Swivel to 3/4 in NPT Male

KB Hypereutectic SB Chevy Dished Piston Set - 4.155" Bore - 3.750" Stroke - 5.700" Rod Length BR10032 ButlerBuilt Front Axle Tether SystemModern 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