Just got the 3" exhaust system hooked up

airwoofer said
68 fish, 416, TTI headers. used a Jegs generic 3" X-pipe and a set of 3" flowmaster 40s. Mufflers to the rear like the TTI X pipe system. Dump on the inside of the rear tires. Sounds pretty good.

The car did not lose any speed on top and the ET was actually a tad quicker. Was not able to weigh the car to see how much was added.

The car had some resonance "bite" at certain RPMs so I had 3" x 8" cherrybombs added right before the flowmaster 40s. The bombs act like resonators and take some of the raspy sound out before the flows get to it. Now the car has 3 distinct sounds. At the point where the engine is just maintaining a cruise you can hear the rear end whining. Below that and you get the rumble from decelleration, the more RPM you start from the more rumble. When the car is being accellerated the flows take over and there is a higher pitched sound.

I really like it. The guys at the local pool bar said it sounded like about 4 harleys coming in as I was doing the decelleration rumble going down through the gears like a manual valve body. Sounds about right as I have 8 cyls and 4 harleys would too. Drove by a couple sherrifs that were sitting in a parking lot and had the throttle set to "rear end whine" and they stayed put. Works for me.