I've had my OBX's on for about a week now. Definate performance improvement. The installation went very smoothly, no clearance issues, although my truck is 2wd. Like Truckman though, I have a very pronounced drone around 1800 RPM. I am looking into solutions, maybe a bullet muffler.

 

Mine are still doing good, I only had to make a small tweek when installing them and if you didnt know I did it you most likely wouldnt even notice.

 

you guys with the drone, are you catless?

 

No cats here. The OBX's don't have cats. The drone was annoying for a while and I did install a stainless steel bullet type muffler in front of my magnaflow. It may have helped a little. It doesn't really bother me anymore. I think moslty I have just gotten used to it, (or I just tend to drive faster so I'm not in the drone zone) Aside from the adjustment I had to make to clear the front ds I am happy with them and so far have felt no ill effects from my adjustment. We'll just have to see what happens if I ever get my cam installed.

Here is a pic of the inside of the bullet/resonator I used.

 

They seem to fit the Silverado SS better as I know another guy who had zero clearance issues. Guess we will see.

 

Zero clerance issues on a 04' AWD SSS here

 

any of you guys get cats welded on? i want to get the OBX headers, but my I/M is around the corner.

 

i guess by what im hearing the obx long tube dont fit the 4x4 trucks very well... i guess there just for the 2 wheel drive

 

Just put them on my 2wd and they're perfect. Only complaint is the drivers side primariy loops up and makes it difficult to get to the two rear plugs and wires. Also, I would highly recommend some hi temp sleeves for your plug wires due to the proximity to the headers on that side.

 

I have seen a few reports that they fit the SSS's with the AWD. I guess the front drive shaft in those must be in a different location than in my 4x4.