Review on 🔧 Spectre Performance 9604 4" Filter Adapter in Sleek Black - Enhance your Vehicle's Performance! by Austin Hearshman

<Original review> This item comes in a very nice box clearly marked 9604 4" Speed Stack Adapter. 6" OD as described but 3.5" inner diameter. In terms of airflow, there's a huge difference between a 3 1/2" pipe and a 4" pipe. Not to mention it won't fit. a 400 mile Auto with a 1/2" tolerance above me. I'll say this thing would probably be great as a 6" to 3.5" speed stack adapter. -- EDIT -- After reading this review I was contacted by a salesperson at Spectre, he stated that the part I received was a 9603 which was not packaged properly, he then promptly sent me a replacement 9604 which is the correct size: 4" ID, 6" OD This is a great company to start this Inter eat to show. for sale is a cheap part and completely makes up for an understandable error. e from them again.