Has anyone modified (gutted) their stock exhaust and kept the servo in operation??.......Happy with the result??

The Drummer and Special Ops mufflers seem to perform pretty well with stock ecm's.

Jack, the drummer elimates the servo valve, uless you get the "economy" model. If you run a regular drummer, the Race ECM is supposed to be the hot ticked - near perfect turning for that pipe.

The special ops pipe keeps the valve in place, so if you add a high-flow airbox you'd want to get something to richin it up with the stock ECM so the valve still operates.

I have a special modded spec ops from Odie that has dual outlets and no servo. This works very well with the race ecm and an open air conversion.

Now if I could just raise the rev limiter a tad...