gotta go 3 inch

I have 3" through the mufflers and 2 1/2" tailpipes. Works great! The exhaust gas will have cooled enough so the engine is not squezed. I also have 12" glass packs in the tail pipes to eliminate drone. The springs are moved in under the frame rails and the rear end narrowed 2". I have 3.23 gears. It ran 12.36 at Las Vegas with an adjustedl altitude of 4000'. I also have a 2500 stall torque converter I don't think that you will notice a loss in performance with the smaller tail pipes. Mine is a true street/strip car. I drive to and from the races and get 15 mpg on the road and 11 around town