Just sourcing a good place to buy factory double platinum spark plugs....NAPA has them for 13.00 a piece ...Jag dealer wants 30.00 ..not sure if the same but..they both claim oem.....

also need rear right muffler... need to replace urgently..as it is obstructed heavily....wondering if I can get from a local midas shop..or if any muffler shop would have an acceptable replacement....I notice the 1999 XJR Jaguar has a lot of muffling...

Thanks!!

 

The OE plugs are not double platinum. They are Iridium plugs. We sell them for $9.96 each. The muffler is not a big deal. They don't fail often. I would go used. How did it become blocked?