With the J600R, and the bifurcated pipe for the Yellow F-4, where should the engine be relative to the start of the pipe? Should the engine exhaust cone be forward of the pipe mouth, or inside the pipe mouth? By what distance?
thanks
Harry

Hi Harry,

Proper distance is 12-15mm between the tail cone (outer) and the start of tail pipe mount.

Regards,
Kraivuth S.