I can tell you from experience that because GP obtained Penzoil trademark licensing For US only. Canadian dealers cannot obtain the kit .. (I even ordered one from a Canadian LHS that has a US postal address and GP would'nt ship it ).
I ended up ordering one from a US hobby shop near the Border and drove to do the Pickup ... Good News is the I only paid the GST at the Border( No Duty )and the Canadian Dollar is Stronger now!
I have installed a ZDZ 40 in mine and it fits well ... the standard bisson muffler is Too wide for it to fit inside the cowl ...( sticks out Both sides)I had to order a compact muffler from abell hobby,and if all goes to plan it should balance without having to add any lead to the firewall !... Very Nice ARF ...
Maybe th Best If ever had ... good Hardware ... except I Don't Trust those CA fabric Hinges on anything bigger than a 40 sized plane ,... I subbed Robarts and Dubro