I had a sachs 4.2 in mine, dont remeber what I had for a pipe? Think it was a B&B. It was an older sachs and shook like mad, I pulled off the 4.2 and installed a MacMinerelli 70 twin. Had to build a custom cowl for it but it flies GREAT on this engine. Take a look at my site at www.lov2flyrc.rcplanet.com goto the photo album page to see the Weeks and engine install.

Todd