525 Mercury Racing cylinder Heads
 

I have a set of 525 Mercury Racing cylinder Heads have completely redone. Pressure tested, complete valve job, resurfaced, new valve seals, new valve springs and the springs are shimmed to match spring pressures. I have over $1200 into the head work. These were done for use in my boat but I decided to go in a different direction with my motor.

Thanks for looking,
Rick

??
 

Do U still have your heads for sale, if so how much? Please let me know, Thanks Paul S.

Yes, I still have them $2400. They're like new!

Ok, let me see if we can salvage mine still. Thanks

What are the valve sizes and brands??

REV inconel valves. I just measured them @2.25 intake & 1.88 exhaust

What do the chambers and intake runners cc at my block is getting cut the first part of next week, I still have time to make changes been looking at the Brodix BB 2 x.

I'm assuming its a boat motor, what engine is in the boat?

You must be a politician or a lawyer you answer a question with a question? boat Dart block 540ci. I found your heads all over the net you've been sitting on them for a while, thanks but I'm going with new brodix.

Rob, I was asking Toyo 321. I was using my cell phone and I did not see your question until now. I just did the 2 540's for my Baja.

Here is what I found online:

Combustion chamber volume 118cc
Intake runner volume 315cc
Exhaust runner volume 110cc
Intake valve diameter 2.25"
Exhaust valve diameter 1.89"
Valve stem diameter 11/32"