Lol I know this is a twat question but can someone tell me each section to an exhaust system from mani - backbox please 
Important! : Exhaust...
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#1
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#2in order from the engine
manifold
downpipe (on 8 valve models)
catalystic converter
centre section
backbox
some vtrs the cat id in the downpipe so its manifold then cat then centre section -
#3thanks, so if i currently have a s/s cat back system... so do i just need s/s mani and s/s de-cat pipe? Or do i have to get a s/s downpipe? lol sorry about this