Signature products are a very high quality!! Trust me i have the 3' downpipe coated and the whole nine yards! It wasn't a crazy amount of money! If you have an open downpipe the power flows better and wont' create a bottle neck effect at boost. Also just to clear something up with everyone and all the haters!!! He's not making a CHEAP product!! He's making an amazing product at a reasonable cost! He understands that people wanna mod their cars but don't have all the money in the world!