Adaptor 4BBL-4BBL SP/B.OR SQ/B

Adaptor 4BBL-4BBL SP/B.OR SQ/B

Redline Adaptor Platefor 4bbl Spreadbore to Squarebore OR Squarebore to Spreadbore. This adaptor is reversible and comes with gaskets, nuts and bolts. Most commonly used on Holden V8 models that were originally fitted with Quadajet Carbs. This adaptor allows Holden’s to fit a Squarebore Holley Carb using original inlet manifold.