The Ford 3.5L EcoBoost Master Kit, No. 6680, from CTA Toolsis specifically crafted for 3.5L EcoBoost engines. Included in the kit are Timing Brackets Nos. 7641 and 3800. Bracket 7641 sets and holds first-generation EcoBoost, ensuring precise timing adjustments, while 3800 aligns cams on second-generation EcoBoost before tensioning, optimizing engine performance. The kit aims to ensure accurate variable cam timing (VCT) on EcoBoost turbocharged engines.