Fits GM TH350, TH350c, Powerglide, Muncie M-20, and Aisin AY6

Part Number: 20299

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.

Features and Benefits

• 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

Does NOT fit B.O.P (Buick, Oldsmobile & Pontiac) TH-350 Transmissions.