Is there any cost effective water cooled top cap for bravo?

I'd say they are all cost effective if they keep your upper from blowing up.

Yes! Cant find many water cooled options, just normal billet caps.

I don't recall seeing any water cooled top caps. Most go with a drive shower. The Simrek seems to be a favorite one of those.

SIMREK Multiport Drive Showers will cool your Alpha or Bravo stern drive by 60 degrees.

Wag's Engineering made a nice Billet top cap with an integrated shower. I had them on my two previous boats. I tried to get them for my current boat but it doesn't appear they are making them any longer.

I just had the TCM billet top caps installed. They seem like a nice piece!

Also found out that wags is out of business.

Drive Cooling Systems | WestCoastOffshore.ca

Here's a option for water cooled top cap. Well worth the money if it works as advertised. My Max Machine Worx 1 1/2in billet top cap and drive shower cost pretty close to what this one is.

That looks clever system! Maybe the billet top cap would still be vise with that system.

I found a used Wags cap and it really is a beautiful piece and a damn shame they went out of business. As I understand it the billet caps from Wags, Teague, etc. also helps to keep the upper cases from flexing under load. A billet cap and Simrik shower seems to be pretty optimal