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B&m

B&M Shift Improver Kits 20261 Transmission Upgrade Kit, Improver, GM, TH400, 3L80, Each

B&m

B&M Shift Improver Kits 20261 Transmission Upgrade Kit, Improver, GM, TH400, 3L80, Each

A$225.27
LOW STOCK! Est Ship 4-7 days. HURRY! LOW STOCK. This item is in limited stock at one of our distribution centres. The ETA is the approximate time required to prepare your order for dispatch.
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Description

B&M Shift Improver kits are the easiest way to get the stout performance you've always wanted out of your automatic transmission. All you need are some hand tools and an afternoon, and you can turn your transmission into a B&M-tuned unit. Each kit has two stages to fit your needs: RV/Towing and Street/Strip.

Part Type

88-90 Gm Th400 375 m40

Data: v4.2 - Upd: 2026-10-11 02:55:14

Specifications

Product Attributes - Brand
B&M
Product Attributes - Manufacturer's Part Number
20261
Product Attributes - Part Type
Automatic Transmission Shift Kits
Product Attributes - Product Line
B&M Shift Improver Kits
Product Attributes - UPC
019695202613
Product Attributes - Filter Included
No
Product Attributes - Gaskets Included
Yes
Product Attributes - Full Manual
No
Product Attributes - Remanufactured
No
Product Attributes - Quantity
Sold as a kit.
Product Attributes - Notes
Does not fit transmissions built before 1988.

Reference Information

Brand Name/s B&m
StreetFX SKU bmm20261
SFX Item ID 5051494
Supplier Item Code 5051494
Manufacturer SKU 20261
Manufacturer UPC 19695202613
Alternative References BNM20261, TH400, 3L80

Compatibility

Application Data
  • MakeBUICK
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer Code3L80
  • MakeBUICK
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer CodeTHM400
  • MakeCHEVROLET
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer Code3L80
  • MakeCHEVROLET
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer CodeTHM400
  • MakeGMC
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer Code3L80
  • MakeGMC
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer CodeTHM400
  • MakeOLDSMOBILE
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer Code3L80
  • MakeOLDSMOBILE
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer CodeTHM400
  • MakePONTIAC
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer Code3L80
  • MakePONTIAC
    Beginning Year1988
    Ending Year1994
    Transmission Manufacturer CodeTHM400

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