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Vehicle Info NeededB&MPART NUMBER: 130-20299
Transmission Speedometer Port Plug for GM TH350, TH350c, Powerglide, Muncie M-20, and Aisin AY6
$3525$39.17You Save$3.92
Ships on 10/08/2026
Lowest Price GuaranteeTransmission Speedometer Port PlugFits GM TH350, TH350c, Powerglide, Muncie M-20, and Aisin AY6 Transmissions Billet Aluminum with Engraved B&M Logo Mil-Spec Black Anodized Finish
B&M 20299 Features:
- Includes (2) Stainless Steel Mounting Bolts, (1) O-Ring, and (1) Washer
- Protects your Transmission from Contaminants During Use or Storage
- Perfect for Electronic Speedometer Conversions
- Replaceable O-Ring Seal for Leak Prevention and Maintenance
Note:
- Does NOT fit B.O.P (Buick, Oldsmobile & Pontiac) TH-350 transmissions
Part TypePlug Fitting
BrandB&M
Package Height0.6
Package Width5.3
Package Length7.7
Weight0.08 PG
Part CategoryPerformance Parts
QuantitySold individually
MaterialBillett Aluminum
Part FitmentSemi Universal
Vendor Part Number20299
Package Qty1
Package TypeEA
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