The Grand Rock Adapter is a practical and versatile solution for your Cummins engine. With its 4-inch OD to 4.5-inch flare turbo/manifold adapter, it seamlessly connects various components. Made from aluminized material, this adapter ensures durability and longevity. Designed specifically for Cummins models, it fits most applications effortlessly. Measuring 4" OD x 4.5" x 6", this adapter is sold individually. Upgrade your engine's performance with the Grand Rock Adapter, a reliable and efficient choice.