Lively,
I don't and I can't. I do work with customer if they have any problems to at least help them by taking huge labor hit when their problem was not my doings. I have done that more than once. Frankly, I am not in a position to really be much concerned about a warranty becuase to this day after 37 years can say I have never seen or heard of one of my race or street engines actually blowing, except for my own and I was beyond pushing the envelope, even then the damages were not that bad. so a warranty is not really considered by any customer I have had. Besides that it is just recently that anyone has started to giving warranties and you can bet your bottom dollar the prices went up for them to do it.
In a street driving application, I will give a 120 day warranty on parts and labor. With me the 120 days is not set in concrete.
I am pretty sure that Bill Henden here does offer a warranty with his engines. I know that Bill of Awsome Engines does. I think that Steve Schmidt has started to offer a warranty on their street engines.
The only way that anyone can possibly offer a warranty is if they are making a good profit. With my low margins I just can't. I probably could if I was getting $35,000 that they get for my same basic engine I get $25,000 for. That is just an example becuase we know that particular package from several of the top builders and what it goes for.
Ed