| I use the individual ones that clip on to the top of each Bellmouth on my 996, I got these new from Khushy and so far have had no problems with them following 15 months of use and I can't say the performance has suffed as its nearly every bit as quick as my 998.
I also have a ITG filter that streaches over both bellmouths on one of my bikes but haven't done many miles with it but seems to work OK
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