Thanks for all the replies guys. Dave W, I have an RTI turbine in it. The distance between the end of the tail cone and the bellmouth is 3/4 inch. The pipe is coming out tomorrow. Eric has always done right by me. I know he will set me up with a new pipe. These der jet cougars are a great value for the first time scale modeler. They have alot of potential. Thanks for all the complements. Alex.