I'm extremely curious about this. This has been buzzing in my head for quite sometime, and I wanna know what you guys think about it. Okay, if I was to do the Magnaflow Cat-Back, and keep the stock cat & exhaust manifold for like a month, how would the exhaust sound if I later upgraded to an AEM CAI, DC Sports 4-2-1 Two Piece Ceramic Header, and the Magnaflow Direct Fit High Flow Race Cat?? Would the Header & the Cat Increase the volume of the exhaust, making it deeper?? Or will it still sound pretty much the same?? PLEASE RESPOND!!!!!.....Oh, and the car is a 94 Accord EX Sedan 5-Speed (F22B1 VTEC)

 

Volume will increase, tone is likely to stay the say or go down a tad. It's hard to say really, because there are a billion different exhaust combos.