An adjustable-height spool and rotating flange on the Seaboard™ frac tree allows for quick alignment with the the OSL Frac Connection. A single large-bore inlet replaces the multiple tie-in lines on a conventional frac tree, reducing non- productive time, labor costs, potential leak paths, and safety hazards. The design employs standard API-6A gaskets and accommodates 4" to 7" connections at 15,000 psi. The SPM frac stack options include grease manifold, frac-ball launcher, grease manifold, and coiled-tubing frac heads.