Made from laser cut 3/16" steel and powder coated black, this bracket set permits the fitment of GM CS121 style alternators with 6.14" center to center between bolt holes. This kit is generally used in conjunction with the 6-rib drive crank hub upgrade.
More information is available here: https://www.mtpturbo.com/qcgd/alternator%20mount%20install%20notes.pdf