I don't really agree with your statement. IF your existing cable have problem, then YES. You will feel the difference in performance. IF it is working perfectly, I can 100% be sure that there won't be much difference felt. Maybe the improvement was so little that you won't feel it at all.
Just like plugs. Upgrading a normal plug to a high performance one sees very little imporvement. Unless the existing plug is time to go (refer to my dyno tuning thread).
I've had experience with bad cables like cracked silicon where during high rev, sparks jumps out from the cable to the rocker cover. When I replaced the cable, it resolves the mis-firing issue at high rev.
haha... u can try 1st. lasttime i change the cable, my ori cable still perform.
have 1 easy way to test the little improve, go downhill.
---------- Post added at 02:41 PM ---------- 6 hour anti-bump limit - Previous post was at 02:39 PM ----------
Sorry to hear about it. Ah Wah told me existing cables are high quality and much better than aftermarkets ones. Unless you go hardcore like getting external high performancec coil like MSD with Nology cables. Err... beware of interference with your radio reception too.