As you can see with my other thread about rattling when cold, my thoughts are leaning towards an exhaust rattle on one of the joints between the rear cat and the start of the HKS Silent, I say this becasue its the most corroded part of the exhaust, the rest of it looks new with no corrosion at all, saying that, its not hanging off or anything, there is just slight corrosion where the batman gasket is between the two pipes. I hypothesis this becasue I'm thinking there is a rattle when cold until the metal expands closing the offending part.
My question is, if I put just a rear decat pipe on, providing me with a new seal between my exhaust and the rear of the old rear cat, will I have to use a restrictor ring to keep the boost down ?, bearing in mind it'll still have the front cat in.
I have no interest in upping power due to the fact that my car is in daily use and want to keep reliability at its highest and certainly don't want to jeopardise my delicate ceramic jap turbo's.