OptiTorque Patriot Series Main Stud Kit - 12 Point Nuts - 4-Bolt Mains - Chromoly - Black Oxide - GM LT-Series WIL300-12581 These differ in that they

These differ in that they exit in a straight-down fashion much like a block hugger header but exit more toward the rear of the engine than our "center dump" manifolds

1 in Double D to 3/4 in Double D

Rely on Sealed Power products for your next engine rebuild or repair

Fits 7mm x 1

Size: 1/2" NPTVibrant Performance was established in 1997 to design and produce Exhaust and Induction components for the Sport Compact performance market

OptiTorque Patriot Series Main Stud Kit - 12 Point Nuts - 4-Bolt Mains - Chromoly - Black Oxide - GM LT-Series WIL300-12581 These differ in that theyProduct Description: Main Stud Kit Patriot Series 12 Point Nuts 4 Bolt Mains Chromoly Black Oxide GM LT Series 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.