The Grand Rock Adapter is a practical and versatile product designed for Detroit Diesel 12V71 models. With its aluminized construction and 4" OD x 4.75" x 6" measurements, this adapter ensures a secure and efficient connection between a 4-inch OD/4-inch ID and a 4.75-inch flare turbo/manifold. It is sold individually and can be easily installed using the V-Band Clamp #VB-475D from Breeze: VT-10475. This adapter offers a reliable solution for various applications, making it a must-have for anyone working with Detroit Diesel 12V71 engines.