The glasspacks I had installed near the exhaust tips resonate more now and have this rather forlorn moan when I add power around town, so I'm looking at making a change. I'd been told that just running straight pipes would resonate even more, but then I read some of you fellows are quite happy with your straight pipes on the rear, and then I saw 17-0359 - Exhaust Kit XK8; Replaces Rear Mufflers .
Look like a good set up? Any different from something a muffler shop could fabricate? I want to keep my quad tips anyway.

 

so what would that leave you for an exhaust IF you put these pipes on?

 

The rest of the system is OEM, cats and middle/center mufflers. The only other change is the replacing of the air filter box with the conical air filter. I don't want anything loud, just some nice rumble/burble type sounds.

 

Anyone happy or unhappy with running straight pipes on the rear?

 

Seems like I've read several times that the rear boxes are the ones that should be left ON, or changed, but not removed...too much resonation with them off.

 

That's why I got confused when I saw the straight pipe conversion on that website.

 

If you remove all four rears, you're going to be really loud I think.

I'd suggest removing the middle set in front of the rear wheels, first. Removing the center will give you more noise, but it will also add in considerable under cabin noise and the volume across the RPM range will be inconsistent.

 

All I removed were the rear most boxes, everything else is OEM, but I may have a line on some XKR rear boxes/piping. They can mate with the quad tip exhaust assemblies if there is a good fit in the car.

Anyone know if the XKR rear box/piping assemblies are a compatable fit into the XK8?

 

I think the rear exhaust is more dependent on convertible/coupe than whether it's an XK8 or R. The year is important too, as they did make changes, I'm not aware of what is cross compatible though.

 

One of them is a coupe, 2005 though, and the others I'm not sure about yet. I think the first thing I'm going to do is have the glass packs removed and try just a straight pipe with the quad tips and see how that sounds. If the packs have gone bad they could be making more noise than a plain pipe would.

 

Straights will resonate around 50 miles an hour which can be very anoying if it is your daily car.

 

Is it just at 50 or is it a range like 50-55?