exhaust build

[jamie16v]

i am looking to make up an exhaust up out of different parts to gain a free flowing exhaust on a budget.
i have been looking on ebay and come across what i think is the same peice of pipe at very different prices so i have contacted one seller to ask for the diameter of the pipe.
the first pipe is a sportex item at around £50 posted and the second is a diesel part at about £20 posted..
am i right in thinking that they are basically the same part but one is painted black and has sport written all over it?..
here are the links.
http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=270597745151&ssPageName=STRK:MEWAX:IT

http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=110542375990&ssPageName=STRK:MEWAX:IT

[Wayne]

Jetex also do diy exhaust parts.

[jamie16v]

i know, will be looking at them too, i dont have a tube bender though so will have to buy their bends which i dont really want so might just go for one of these ready made pipes anyway but for the rest of the exhaust they will be o.k

[T_J_G]

What backbox you going for?

[jamie16v]

not sure, havent chosen anything yet.. havent looked that far but not looking for loud for a start.

[T_J_G]

I want a new backbox but they're lots of ££ for Milltek etc

[jamie16v]

right, while funds are low i am going to be making my own decat by chopping out the platanium from a standard cat and welding it back up, so, if anyone happens to have one for a 1.8t laying about let us know (really need one).
i am also going to bypass the centre box with a diesel pipe and keep the standard back box for now.

[T_J_G]

Remember to get two reducers then!

[jamie16v]

is the diesel pipe thicker then?

[T_J_G]

Im not sure actually thought the upgrade pipe would be 2.5inch, if not I may buy one...