Quote:
Originally Posted by NC TRACKRAT
I purchased my 993 w/FABSPEED exhaust, chip and air intake already installed. Couldn't be more pleased w/all three. Would buy them if they weren't installed.  Serious sounds! Even my wife (an enthusiast also) loves it. Very authoritative but not obnoxious. Only minor issue: At start-up, I hear a minor metallic vibration which goes away when the system heats up. BTW, you're right down the road from me. Do you know Marty w/the yellow GT3? |
The 964 and 993 cat bypass are two very different things
On the 993 the bypass sounds great w/ stock mufflers but is too loud w/ modified mufflers.
Rattling tin is often found in older or modified mufflers. The bypass itself is very solid ss pipe, nothing to rattle except perhaps where the l/r side pass each other. There should be a clearance gap at that point. IF you don't have one adjust the pipes.