MSD Street Fire Spiral Core 8 mm Spark Plug Wire Set - Black - Factory Style Boots / Terminals - Big Block Chevy 5567 Motorsport Shoe Heat Shield 149% increase (rear) in sway

149% increase (rear) in sway bar rate

15 in Oval

One 3-3/8 in Diameter Gauge

Big GM inlet thread is 7/16"-20

MSD Street Fire Spiral Core 8 mm Spark Plug Wire Set - Black - Factory Style Boots / Terminals - Big Block Chevy 5567 Motorsport Shoe Heat Shield 149% increase (rear) in swayThe 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