I just had Suntek CIR 30 installed on the M2C. It's carbon (not dyed) and non-metallic ceramic. The heat rejection is worlds better than the Suntek CTX 45 I had on the M2.
Whatever you buy get carbon and ceramic then choose the installer not the brand.
Last edited by omasou; 07-03-2019 at 08:52 PM..
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