Buying exhaust, twin cat?

I've found an ebay shop that does the exact exhaust I need for half the price Ive been quoted at the garage...Now i have done the whole compatibility thing and it says it will fit but there is a disclaimer saying that if it doesnt have a twin cat converter it wont fit? How would I know if it does or not? If i dont know what im looking for? Its a '94 mk1 discovery 3.9l V8 with and lpg conversion...any ideas?

look undeneeth, there will be 2 cats before the y

discomark10 said:

look undeneeth, there will be 2 cats before the y

Click to expand...

Thanks didnt know where they'd be turns out it does...and they look pretty clean too! Not corroded at all surprisingly...