markc0220k Posted February 10, 2020 Author Share Posted February 10, 2020 (edited) ok, back to the topic.. the gasket btw dp and the cbe thanks Rwebb, you are right ( and thanks for the forum here, most ppl are saying the old gasket maynot be able to be removed in one piece!) the old donut is so hard to removed, i'd tired but it was about to crack! Edited February 10, 2020 by markc0220k Link to comment Share on other sites More sharing options...
markc0220k Posted February 10, 2020 Author Share Posted February 10, 2020 (edited) the width of both stock and cobb are same Edited February 10, 2020 by markc0220k Link to comment Share on other sites More sharing options...
markc0220k Posted February 10, 2020 Author Share Posted February 10, 2020 little busy these few days, will open the box soon and take some pics for both stock and new exhaust diameter, also detail about the new donut with the new cbe:) Link to comment Share on other sites More sharing options...
RWebb Posted February 11, 2020 Share Posted February 11, 2020 Glad its looking good! Link to comment Share on other sites More sharing options...
BoozeRS05 Posted February 11, 2020 Share Posted February 11, 2020 (edited) You'll still need an adapter to mate the COBB downpipe to any 3" catback. You won't need it for a stock exhaust install. If I recall you'll remove the graphite donut gasket when you install the adapter and catback exhaust. There are plenty of good options for around $40. I went with CNT recently and it worked great. Edited February 11, 2020 by BoozeRS05 EB's Subaru journal - 2005 LegacyGT Wagon & 2014 Forester FB25 (2008 specB - RIP) IG@legacygtliving Link to comment Share on other sites More sharing options...
RWebb Posted February 11, 2020 Share Posted February 11, 2020 You'll still need an adapter to mate the COBB downpipe to any 3" catback. You won't need it for a stock exhaust install. If I recall you'll remove the graphite donut gasket when you install the adapter and catback exhaust. There are plenty of good options for around $40. I went with CNT recently and it worked great. Is the Invidia Q300 a true 3" or does it neck down? Link to comment Share on other sites More sharing options...
BoozeRS05 Posted February 12, 2020 Share Posted February 12, 2020 (edited) Pretty sure it's 3". I looked quickly on one of the vendor sites and the Invidia CBE listed the adapter as an additional item for a stock DP Edited February 12, 2020 by BoozeRS05 EB's Subaru journal - 2005 LegacyGT Wagon & 2014 Forester FB25 (2008 specB - RIP) IG@legacygtliving Link to comment Share on other sites More sharing options...
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