OptiTorque Patriot Series Main Stud Kit - 12 Point Nuts - 2-Bolt Mains - Black Oxide - Nissan 4-Cylinder EARAT991953ERL 4 is also available in

4 is also available in a 2-piece version

IMPROVED FLOW CAPACITY - Mandrel bends (where applicable) improve flow capacity over traditional bends while increased pipe diameter from OE sizes increases flow and power

Designed for long service life

C35 Pickup

750 to 800 CFM carb and headers

OptiTorque Patriot Series Main Stud Kit - 12 Point Nuts - 2-Bolt Mains - Black Oxide - Nissan 4-Cylinder EARAT991953ERL 4 is also available inProduct Description: Main Stud Kit Patriot Series 12 Point Nuts 2 Bolt Mains Steel Black Oxide Nissan 4 Cylinder OptiTorque produces premium quality fasteners for a wide range of automotive applications. From stock rebuilds to hard core racing builds, OptiTorque fasteners are USA made and designed, featuring premium materials and designed to meet or exceed OEM specs.