Nic Gromofsky

So I got my son a 2008 400ex, it has a best up old procircuit silencer on it and want to get him something newer. He is 12 and this thing gets beat up so not looking to spend big money but want to get him a quality cheap pipe for his birthday. Looking at big gun eco and hmf slip on. I have a big gun full system on mine and it has held up great and sounds great although I think listening to a nuke go off a mile away maybe quieter. Haha