i saw a 991 c2 with 997 c2s tips to get rid of the oval oem tips which personaly prefer over the quads!! but i found some 991 c2 quad chromes tips for a decent price and decided to try them out. turns out they fit on my remus exhaust! so if anyone is looking for tips for a 997 c2s and wants too keep the oval tips you can search on ebay for 991 tips for c2 they are way cheaper than tips for 997

 

Good catch!! Thanks for posting.