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Fitting a 2.5" B-pipe

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Hi all, checked my exhaust yesterday and will be replacing the b pipe with a Js racing 60rs. My oem b pipe is rusting around the bolts where the flange connects to the back box, and the flange plates don't appear to be touching, is there some sort of donut gasket there? Anyway just after some advice on what I'll need to pre order before taking the exhaust off, bolts, gaskets etc and where best to buy them?

Thanks.
 
Thanks. I guess that's for oem pipe size? Wondering if it'll be a bit small for the 60mm js pipe?
 
i imagine your going to need a 2.5in id donut.
You need to measure your b pipe end to work out the size needed.
 
Ta. It's 60mm or 2.4". A 2.5" sounds right, I assume that the cat end of the b pipe has a standard bolt alignment to suit any b pipe?
 
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