This is a Exhaust Deflector for .35-.90 Size Glow Engines. This Deflector fits the following Engines: K&B: .40 R/C, .45 SPORTSTER, .61 R/C, .65 SPORTSTER IRVINE: .40-.61 R/C O.S. MAX: .35-.61 (including FP, LA, SF, FX, FSR) FOX all R/C: .19-.74 ROYAL: .40, .45, R/C, BB, ABC SUPERTIGRE: S-.61-.90 (including K & G Series) 45 Degree Bend Directs Exhaust Out and Away from the Airplane Fits Any Exhaust Output which Measures from 3/8"-1/2" One Deflector Two Tie-Wraps ir/jl &