Will this fit my LChttp://cgi.ebay.co.uk/VW-GOLF-4-1-8T-GTI-20V-TURBO-DECAT-DOWNPIPE-DOWN-PIPE_W0QQitemZ120540341899QQcmdZViewItemQQptZUK_CarsParts_Vehicles_CarParts_SM?hash=item1c10c3a68b If so if i fit it will any lights come on on the dash? Is this a good upgrade? im looking to fit a powerflow cat back system will this fit well together? thanks