On new cars, don't expect any felt benefits. On older clunky ones, there might be some placebo effect on unwanted noise reduction.
Compared 2 identical cars of about same age, usage & kms clocked(around 30k+)...1 w/ those tolerance-reducing rings installed early in its ownership. Both cars ran no differently on any surface at variable speeds. Guess they're both still too young to need them?
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3M Color Stable series are all above 50% TSER. RFID readable through the tint, stays good for...
What's the best car tint brand and color?