LiftMaster / Part reference

LiftMaster G2778: eight-foot belt-drive rail and exact model scope

Compare the G2778 supplier application list while preserving 87504-267 and the distinct later model suffixes.

US source scopeUpdated 2026-09-13Independent Anderson reference

Match the whole number.

Manufacturer identifier: G2778. Keep every character when comparing it with your label or paperwork. A similar number does not establish the same component.

GAS Hardware source: G2778Product title, Description and explicit options or specifications · checked 2026-09-13 · GAS Hardware

Values apply to the exact identifier and scope in the cited source.
Component identity	GAS Hardware identifies G2778 and separately prints LIF-G2778 in the description heading. GAS Hardware source: G2778Product title, Description and explicit options or specifications · checked 2026-09-13 · GAS Hardware
Door and rail scope	The title specifies eight-foot door height. The description calls this a one-piece belt-drive rail assembly measuring eight feet (2.4 m). These remain source-stated specifications. GAS Hardware source: G2778Product title, Description and explicit options or specifications · checked 2026-09-13 · GAS Hardware
Explicit model list	The listing names 87504-267, 84501, 6690L, 6580L and 84504R. The first number does not contain an R. GAS Hardware source: G2778Product title, Description and explicit options or specifications · checked 2026-09-13 · GAS Hardware
Other supplier designations	MR2778BD, 2778PL, 012381227785, 2778BDC, 2778BD and MR2778BDC appear as other designations. Manufacturer equivalence is not independently verified. GAS Hardware source: G2778Product title, Description and explicit options or specifications · checked 2026-09-13 · GAS Hardware
Selection requirement	Check the exact opener manual for the required rail kit. This G2778 listing does not resolve the separate G2777 description discrepancy. GAS Hardware source: G2778Product title, Description and explicit options or specifications · checked 2026-09-13 · GAS Hardware

Documented fitment & exclusions

Read the exact equipment or component, market, production and variant limits in every row. An omitted pairing has not been verified by this reference.

Source statements and their exact conditions. Use the checker below to compare equipment or a component.
Equipment or component / relationship	Evidence and conditions
6580L Documented compatibility From G2778 to 6580L.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed drive-type door-height-ft source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GAS Hardware explicitly lists 6580L for this component under the stated source conditions. Applies only within this source scope Market: US drive-type: belt door-height-ft: 8 GAS Hardware assertion for the eight-foot-door G2778 configuration; confirm the specific opener manual before selection. Preserve every listed suffix. No 87504R-267 equivalence, reverse application or family-wide compatibility is inferred. GAS Hardware source: G2778Description: explicit compatibility list: 6580L · checked 2026-09-13 · GAS Hardware
6690L Documented compatibility From G2778 to 6690L.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed drive-type door-height-ft source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GAS Hardware explicitly lists 6690L for this component under the stated source conditions. Applies only within this source scope Market: US drive-type: belt door-height-ft: 8 GAS Hardware assertion for the eight-foot-door G2778 configuration; confirm the specific opener manual before selection. Preserve every listed suffix. No 87504R-267 equivalence, reverse application or family-wide compatibility is inferred. GAS Hardware source: G2778Description: explicit compatibility list: 6690L · checked 2026-09-13 · GAS Hardware
84501 Documented compatibility From G2778 to 84501.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed drive-type door-height-ft source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GAS Hardware explicitly lists 84501 for this component under the stated source conditions. Applies only within this source scope Market: US drive-type: belt door-height-ft: 8 GAS Hardware assertion for the eight-foot-door G2778 configuration; confirm the specific opener manual before selection. Preserve every listed suffix. No 87504R-267 equivalence, reverse application or family-wide compatibility is inferred. GAS Hardware source: G2778Description: explicit compatibility list: 84501 · checked 2026-09-13 · GAS Hardware
84504R Documented compatibility From G2778 to 84504R.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed drive-type door-height-ft source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GAS Hardware explicitly lists 84504R for this component under the stated source conditions. Applies only within this source scope Market: US drive-type: belt door-height-ft: 8 GAS Hardware assertion for the eight-foot-door G2778 configuration; confirm the specific opener manual before selection. Preserve every listed suffix. No 87504R-267 equivalence, reverse application or family-wide compatibility is inferred. GAS Hardware source: G2778Description: explicit compatibility list: 84504R · checked 2026-09-13 · GAS Hardware
87504-267 Documented compatibility From G2778 to 87504-267.	Conditional Additional source conditions or an adapter must be checked before confirming compatibility. Details still needed drive-type door-height-ft source conditions Use the exact label and the source scope below. An unanswered condition keeps this result conditional or unverified. GAS Hardware explicitly lists 87504-267 for this component under the stated source conditions. Applies only within this source scope Market: US drive-type: belt door-height-ft: 8 GAS Hardware assertion for the eight-foot-door G2778 configuration; confirm the specific opener manual before selection. Preserve every listed suffix. No 87504R-267 equivalence, reverse application or family-wide compatibility is inferred. GAS Hardware source: G2778Description: explicit compatibility list: 87504-267 · checked 2026-09-13 · GAS Hardware

Direct replacement paths

No direct successor for G2778 is verified in this reference.

A direct replacement statement does not establish reverse interchangeability, a kit equivalent or a later replacement chain.

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Sources & scope

GAS Hardware source: G2778GAS Hardware · US · checked 2026-09-13

Anderson prepared this reference from the listed evidence. Source statements are not an Anderson installation inspection or independent product test. Official documents stay on their publisher’s website.

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