The Grand Rock Adapter is a practical and versatile product designed to replace Cat #9N6325. With its 4 Inch ID/4 Inch ID to 4.625 Inch Flare Turbo/Manifold Adapter, it offers a seamless fit for most Cat #9N6325 models. Made from durable aluminized material, this adapter ensures long-lasting performance. It can be easily installed using the V-Band Clamp #VB-461D. Breeze: VT-10461. With its compact dimensions of 4" ID x 4.625" x 2", the Grand Rock Adapter is a reliable solution for your turbo and manifold needs. Sold individually, this adapter is a must-have for any automotive enthusiast.