Alex V had a stubby antenna on his car at NSXPO. There should be a pic somewhere in Lud's NSXPO pics. I asked him about it and here was the reply:
That antenna fits without modifications. I did have to shorten the cable that came with the antenna to cut down the excess, but no mods to the NSX wiring or fender hole were needed. It is the only aftermarket stubby antenna that I know that does not require any modifications to the NSX. The S2000 antenna requires enlargement of the fender hole to make it fit. It looks like it is an amplified antenna, with wiring for power. Reception is decent, with no noticeable loss.
It is made a company called ZENDAR, and should be available at any auto accessories store. If you have trouble finding it, let me know. I can get it for you from out here in Southern CA. It costs about $55.
HTH.
Regards,
Alex
ALEXANDER A. VIZCARRA
NSX Club of America
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92 Red/Blk