Dem, the whole system retails at just over £4340, thats for the sports cats, the center section, link pipes and the rear boxes...that includes the VAT but not delivery or fitting).
Now, I know that sounds a lot, but as a comparison, to replace the same components going the OEM route would cost £5390 (as at 30/jun/10 sourced from Eurospares).
I paid a lot less BTW as they used my car to develop the sports cats,
Regards,
Enzo.