MSD Street Fire Spiral Core 8 mm Spark Plug Wire Set - Black - Factory Style Boots / Terminals - Big Block Chevy 5567 Motorsport Shoe Heat Shield Big GM inlet thread is

Big GM inlet thread is 7/16"-20

One 3-3/8 in Diameter Gauge

149% increase (rear) in sway bar rate

for their sprint car series and has racing applications with other classes

Fine tune vehicle set-up by adjusting the upper bushing plate

MSD Street Fire Spiral Core 8 mm Spark Plug Wire Set - Black - Factory Style Boots / Terminals - Big Block Chevy 5567 Motorsport Shoe Heat Shield Big GM inlet thread isThe Street Fire Spark Plug Wires feature a low resistance conductor thats wrapped in a sleek and durable black sleeve. The terminals are covered in black boots that protect the conductor from engine heat to ensure spark delivery. MSD Street Fire Spark Plug Wire Set 5567 HEI Style Helically Wound Conductor Suppresses Electro And Radio Noise Great Strength And Durability Heavy Duty Terminals For Secure Connection 8 mm Silicone Synthetic Jacket Resists