About Magnaflow Muffler Install

[AnthonyR23]

Hi.. there are a pair of magnaflow mufflers that I can get locally used for around 50 bucks... but they are 3 inch in and out... the rest of my exhaust is 2 and a half... can I just do a step up and step down... anything negative about installing these? Do you guys think it is a good deal??

 

[91 HATCH]

i think it is a good deal just do the step up step down but make sure they are small enough to fit under car first