Guys, i need to do this to my X but which one should I go for considering it would be the first time? It seems the Seafoam is more powerful or is that wrong? Lucas vs Seafoam?

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BMW X5 E53, 4.8iS - 2005
Professional Stereo/Nav with DSP (modified BM54 module) - Converted to Eonon GA5166X with Reverse cam
4-Corner Air Suspension - Converted to BC Coilovers