The are designed for boats surpassing 50' and quad engines exceeding 1600 horsepower. Experience the difference with this new high performance series of outrigger mounts. Features:• Increased surface area on the hard top plate• Increased thickness of the 6" x 8" oval hard top plate to 3/4" to reduce flex• Larger top tube with longer bearing surface for improved stability• Extended upper casting to prevent tube buckling• Compatible with TACO Marine aluminum and carbon fiber poles (1-1/2" diameter)• Ideal for use on high performance boats with 3, 4 or 5 engines• Double the amount of top assembly hardware compared to Grand Slam 280 series• Stainless lever grip for additional strength• New mushroom outrigger twist and lock pin for one hand operation• Eight bolt pattern attachment for increased arm and pole support• Increased thickness in the backing plate to 1/2"• Uses same bolt and hole pattern for installation as current Grand Slam series• Sold in pairs Stainless lever grip for additional strength Sold in pairs | Taco Grand Slam 400 Outrigger Top Mounts