Here's a pic. of the ststem that topspeedlowet is talking about. They go for about $35.00.
I've got a set of Lemons for my Malibu 2" to 2 1/8 Step with 4" collectors. I haven't put them on yet, but you want be disappointed with the quality, if you are running alcohol you may want to have them weld in EGT bungs while they are building them, it's more cost effective if they do them at the time of the build.
JMO
Zip.