Yeah, McTaff, I agree it is one of THE most annoying problems the SVX throws up.
You are driving around in a rock solid quiet luxury coupe, and pulling into or out of car parks you get this rattle. Makes it sound like a banger!!
Sounds like your problem is loose baffle plates in the resonator.
You might have gathered that I fixed my last car by replacing with a straight pipe. Bad move!
The exhaust sounded permanently like you had a hole in it somewhere. A "flat" sound, with no hint of rumble or the power growl that the SVX shows in a subdued way at low revs. I could not recommend it.
If it happens again in Betty, my latest, I will either replace the resonator [comes with a whole section of pipe, so it's not cheap] or else take the tin opener to the rattly resonator box and fix all loose baffles.
Joe
__________________
Black Betty [Bam a Lam!] '93 UK spec, still languishing
Betty
Jersey Girl Silver '92 UK [Channel Isles] 40K
Jersey Girl @ Mersea
Candy Purple Honda Blackbird
Plum Dangerous
White X2 RVR Mitsubishi 1800GDI.
Vantastic
40,000 miles Jersey Girl