This is an Offenhauser 5186 dual quad (2x4) intake manifold that fits big block MOPAR 350/361/383 and 400 cubic inch engines. It will NOT fit raised block MOPAR's. It is flawless and looks like new. You can buy one of these from Summit for $351.97 and you'll have to wait 5 months for it. Mine can be in your hands 2 to 5 days after you pay for it. As this manifold is flawless, there really isn't much I can tell you about it. It's been restored right down to the rough polish that Offenhauser puts on their manifold logo's when they're new. Every thread on it has been chased and checked and all of them are perfect. As it's a dry manifold , there's no erosion. Look at the pictures and you'll see the truth in what I say. I'll tell you all about any part I sell and the pictures are just there to back up my words. This a bitchin' manifold for your big block MOPAR and everyone will think it's new. This also the only dual quad now available for MOPAR's. It includes the 2 Offy adapters that let you mount any 4 barrels other than Dominators on it. Every thread has been chased and checked and all are perfect. Offy has been around far longer than most of us have, and they worked hard to get their good reputation. They are made in the USA, and men, not computers machine their parts. $250 plus the ride by FedEx. Send me your zip and I'll tell you how much the shipping will be.