Thickness is about the same- at least I haven't noticed a difference. The rep is not flimsy or any more flexible than the original. I've had it on for ~18 months now with no problems of reliability, and have R&R'd it several times for various reasons and all mounting tabs etc remain good as new.
If I remember I'll grab the mic and do some comparing tonight...
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1and1
135i - E82.N54 2009 BSM - MHD / xHP / DCI, PR CP & 7.5" Race IC / N55 mid & Borla
. . WL RSFI, Koni, Eibach & Dinan CP's, M3 CA's / EBC Red's & Firehawk 500's
X1 - E84.N20 2013 MGM - JB4 - The Wife's, now with new turbo & ewg
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