QA1 Adjustable Upper Trailing Arms - 68-72 GM A-Body 10290 O-Ring Boss (ORB) Port Plugs

O-Ring Boss (ORB) Port Plugs are the only way to safely and correctly block and seal unused ORB ports in Aeromotive pressure regulators and fuel rails

3/8 in Allen

Completely customizable display of all EFI parameters including every user configurable input and output available

Fits all GM LS Gen III engines equipped with LS3/L92 style rectangular port cylinder heads

QA1 Adjustable Upper Trailing Arms - 68-72 GM A-Body 10290 O-Ring Boss (ORB) Port PlugsAll upper tubular and lower boxed trailing arms use polyurethane bushings on both ends, while upper adjustable and lower tubular trailing arms use a spherical ball or rod end assembly on the chassis end to eliminate bushing bind, allowing the suspension to move smoother for better control. This keeps the tires planted firmly on the ground for improved traction and a more predictable, better handling car. For a long lasting finish, tubular and boxed