B&M TRANSMISSION SPEEDOMETER PORT PLUG - 20300 BLH 4L V8 1987 - 1989

4L V8 1987 - 1989 GMC V3500 454/7

3 V6 1988 - 1991 GMC S15 Jimmy 262/4

1x Rear Axle Brake Line B

This tuning kit is composed of a selection of accelerator pump hardware components including pump diaphragms

B&M TRANSMISSION SPEEDOMETER PORT PLUG - 20300 BLH 4L V8 1987 - 1989Overview: B&M Racing & Performance brings you this billet aluminum speedometer port block off plug that fits Mopar TF 727, 36RH, 37RH, 46RH and 47RH 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