Study of the Large Diameter GORE EXCLUDER® AAA Endoprosthesis in Abdominal Aneurysms

Inclusion Criteria: * Infrarenal AAA \> or equal to 4.5 cm in diameter * Proximal infrarenal aortic neck length \> or equal 15mm * Anatomy meets 31mm EXCLUDER specification criteria * Access vessel able to receive 20 Fr. introducer sheath * Life expectancy \>2 years * Surgical candidate * ASA Class I, II, III, or IV * NYHA Class I, II, III * 21 years of age or older * Male or infertile female * Ability to comply with protocol requirements including follow-up * Signed Informed Consent Form Exclusion Criteria: * Mycotic or ruptured aneurysm * Participating in another investigational device or drug study within 1 year * Documented history of drug abuse within 6 months * Coexisting thoracic aortic aneurysm (50% larger than proximal aorta) * Myocardial infarction or cerebral vascular accident within 6 weeks * Pulmonary insufficiency requiring chronic home oxygen therapy or inability to ambulate due to pulmonary function * Renal insufficiency (Creatinine \> 2.5 mg/dL) without dialysis * Iliac anatomy that would require occlusion of both internal iliac arteries * "Planned" occlusion or reimplantation of significant mesenteric or renal arteries * "Planned" concomitant surgical procedure or previous major surgery within 30 days * Previous prosthesis placement in the same position of the aorta or iliac arteries * Degenerative connective tissue disease, e.g., Marfans and Ehlers Danlos Syndrome * Proximal neck angulation \> 60 degrees * Presence of significant thrombus at arterial implantation sites