spark arrestors for X-6, Hetrick or GT Thunder pipes?

[Glamis400ex]

I'm looking to possibly swap my DMC for a pipe that is made for a built motor. I like the GT Thunder, X-6 or Hetricks.I emailed GT Thunder, they told me a Cobra sparky would work.

What do you guys with these pipes do for SA's?

Glamis

[Silverfox@C&DRacing]

I ordered my sparks x6 with the spark arrestor. it is cheaper to order it in the first place I think later to add the spark arrestor is $100

[skemp]

I don't have one in my Hetrick. If I do get one, I believe this XR's Only (http://xrsonly.com/exhaust/exhaust_2.htm) unit will bolt right in. My Hetrick exhaust already has an XR's Only end cap on it, but there is no S/A. I guess I would just call Al Baker to see if it will fit, but I am almost positive it will. I am referring to the turn down tip in the middle of the page for $39.95