Originally Posted by Steve Hellums

I pulled out my grill last night to check out what size hole the end of the intake tube's fit into. They are oval shaped measuring about 2" tall & 1" wide. I knew they were small because I had noticed them when I had my grill out last winter, but I didn't relize they were that small. They equal out to about an 1-1/2" to 1-3/4" ID round hole. I was going to wait till this winter to make improvements there, but I think I'm going to go ahead and do it this weekend. I hope the gains are as good as the SL55 "Y" & hose's.