these are 2 inch primaries 3 1/2 inch collectors equal length hooker competition ,#7 and 8 tubes are removable,work fine no holes,no repairs,have some dents for clearence,these are used and show it still very usable for a racer not a show item pretty sure they fit most buicks including 68-72 gs,have some pics if interested,these dont fit 65 gs i know that, hooker no longer sells these, make an offer asking 200.00 as is no refunds shipping will just cost too much to be sending back and forth if your near 60510 come p/u and insp in person ken 630-531-2038
