I'm getting ready to chase down idle surge which cropped up sometime while the car was parked in the garage for 4 years (it didn't have it when parked). I'm thinking it's some vacuum line deteriorated or got nibbled on or something like that.

But I'm going to follow Terry's Talon Troubleshooting guide and EGR blocking is one of the items. I figure I might as well just block it off for good since I'm taking it apart.

So I got a commercial block off plate from Level Zero Motorsports, and it came with the plate and also a fibrous gasket. My simple question is, which side of the plate does the supplied gasket go on? On the hot exhaust side, or on the other side?