Originally Posted by mxk116

To answer your questions in order asked-

• Since the fasteners were originally retightened, in addition to ~300 miles of street driving, I put on ~450 track miles or so at 2 weekend events, 1 at to Nelson Ledges and 1 at VIR. During my routine post event inspection/maintenance/clean-up process I found no need to retighten the clamps on the X-Pipe.

• While I do not believe there is any power enhancement from the addition of the X-Pipe I have not yet dyno'd the car with and without the OE center section. When the track season is over in this part of the country (October typically) I will be taking the car over to my friends at Switzer Performance Innovation to do just that. We will get a base line with the OE center section and the RSS X-Pipe and then start tuning the engine to see what gains we can get. I hope to share the results when the work is done.

• Yes, they are larger than stock (3 3/8") and welded on. Here is a link to the complete spec on the RSS website

• Needless to say we still enjoy the sound. It has retained it's wonderful harmonic complexity. I have yet to attend a track event and not have someone seek out the car and comment about it's sound.

It's a tough choice. The SharkWerks product has earned it's excellent reputation. Fortunately RSS has provided an equally exceptional product that uses a different approach to achieve the same goal. You can't go wrong with either as long as you are satisfied with the result.