A-B17200055SM-AI TUBE - MANIFOLDOne New Aftermarket Replacement Tube Manifold Fits Briggs and Stratton (B&S) Small Engines This aftermarket replacement manifold tube serves as the crossover passage that carries the air fuel mixture from the carburetor to the intake valve on Fits Briggs and Stratton (B&S) small engines. The tube is prone to cracking from heat exposure and can cause engine surging or rough running when it fails replacing a damaged manifold tube restores proper intake