All States Ag Parts Muffler John Deere 4230 4030 4020 4240 3020 4440 4000 4040 AR41171 Fits John Deere Tractor(s) 3020 (diesel s/n 123000-later), 4000 (diesel s/n 201000-later), 4020 (diesel s/n 201000-later), 4030, 4040, 4230, 4240, 4440 Replaces John Deere OEM nos AR41171, AR86595 Style: Vertical Overall Length: 27" Shell Diameter: 4-1/4"x9"