carsound 2.25 or 2.5???
hey im looking to get a catalready with o2 bungs but im not sure if i should get a 2.25 or 2.5 i currently have a thermal exhaust and im not sure wat size the connector is and am plannig to get a greddy 421 header will althis match up with a 2.5 or should i stick with the 2.25 thnx
for my 97 gsr