440EX with XR cam, what pipe?

[RAPTORAZ]

I've got a fellow co-worker(without a computer) that has a 2001 400EX with an I.M.S. 440 kit and an XR400 cam using the stock headpipe and a Pro Circuit T4 silencer. He wants to upgrade to a complete exhaust system. What do you all recommend for him? We mostly ride dunes and desert.

[kabd69667]

Try the curtis sparks x-6 or a lrd big bore pipe

[Dave400ex]

I agree with Kabd69667. Get a Sparks X-6 or LRD Big Bore.