Overview B&M Racing & Performance brings you this billet aluminum speedometer port block-off plug that fits GM TH350, TH350c, Powerglide, Muncie M-20, and Aisin AY6 transmissions. This plug is used to block the mechanical speedometer gear port when upgrading to an electronic speedometer and includes a replaceable Buna-N-rubber o-ring. It features a black Mil-Spec anodized finish for long-lasting good looks, even in harsh conditions. Comes with hardware and instructions for a quick and easy installation. Does NOT fit B.O.P (Buick, Oldsmobile & Pontiac) TH-350 Transmissions Features Billet Aluminum Construction with Engraved B&M Logo Protects Your Transmission from Contaminants during use or storage Replaceable O-ring seal for leak prevention and simple maintenance Perfect for Electronic Speedometer Conversions Mil-Spec Black Anodized Finish for long lasting good looks Includes Stainless Steel Hardware for Superior Corrosion Resistance
