Jburch when did I get defensive? I said it looks genaric am I wrong? no..I never said it did NOT work, I use a hair dryer for a good 5 mins on my engine does not heat it up as fast as a heat gun which is why I do not use a heat gun..I heat my chassis, engine crank case,head everything nice and evenly...to me the price of Marks product is a little high for what you are getting...nothing more nothing less.....

Ryan