i have an old 3.5 horse tec on my ezrider minibike. my buddy made me a muffler to use on my engine. i just recently looked at it and it is cracking along the bends in the pipe. i use this bike to get back and forth to work every day. i have looked everywhere to try and find a muffler that fits that im happy with. i would really appriciate any help with this one.