If Revain doesn't have such a good return Replacement policy I would be furious with this purchase. I ordered 4 of these to replace the whole set on my 1998 Corvette. Have it professionally installed. 1 was DOA. Raven sent me a replacement. Furnished. I went to retrain the system and 1 more has already stopped working. So now Revain is sending me a replacement for this one. So when all is said and done, it takes 6 pieces to get 4 workers. And it was $20 per wheel to install at a nationally known tire shop, which means I had to spend an extra $40 for the replacement install. I applaud Revain for their free replacement. But these places stink. Definitely wouldn't recommend it to other Corvette owners.