Gasket at downpipe and turbo

[zapp240]

Should I have a gasket between the downpipe (RJC 3") and turbo? there wasn't one when I got the car but see they are available,, any ideas.

http://www.ebay.com/itm/262451048572?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT

 

[Chuck Leeper]

I never use 1. File the surfaces flat, clean, apply a THIN coat of hi temp silicone.
Sensor safe antiseize on the bolts.

 

[Emiliano Lago]

no need for one.