4N9213 Elbow Fits Caterpillar 6A 6S D6E D6G2 LGP D6G2 XLOne New Aftermarket Replacement Exhaust Elbow for Caterpillar (Cat) Track Type Tractors, Track Loaders, and More This aftermarket replacement exhaust elbow (4N9213 4N 9213) is part of the air inlet and exhaust system on Caterpillar equipment powered by the 3304B and 3306 engines. It routes exhaust gases from the turbocharger outlet to the muffler inlet, directing flow smoothly to maintain proper exhaust system function. Compatible Models Caterpillar