those are the smallest cherry bombs i've ever seen.....:burnout:yes there a 8inch case 12 inch overall worked out well for me i dindnt want much restriction just a little back pressure and to quite her a little while tuning ,there the only 3.5 in and out i found wanted ones with a collector flange but they only come in 2.5 inch in and out so i welded on a 3.5 inch collector flange, nice and simple ,might put on some turnouts but local auto parts store doesnt have them with 3.5 id opening ,found some on summit for $38 each to much for a simple natural finish turnout.I think there a cool old skool easy add on but all my tastes and thoughts seem to be outdated 60s 70s dinasoure day technology compaired to the barret - jackson types of the car world today!