OEM 2021 GMC Sierra 3500 HD Exhaust Flange Gasket

Exhaust Pipe Flange Gasket

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7 Exhaust Flange Gaskets found

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2021 GMC Sierra 3500 HD Gasket, Exhaust Manifold
Part Number: 12657093
$12.08 MSRP: $18.93
You Save: $6.85 (37%)
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Product Specifications
- Other Name: GASKET, Manifold to Cylinder Head; Exhaust Manifold Gasket, Manifold Gasket
- Item Weight: 0.40 Pounds
- Item Dimensions: 18.8 x 3.0 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12657093
- Warranty: This genuine part is guaranteed by GM's factory warranty.
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Fits the following 2021 GMC Sierra 3500 HD Submodels:
- AT4, Base, Denali, Pro, SLE, SLT | 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
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2021 GMC Sierra 3500 HD Seal, Exhaust Manifold Pipe
Part Number: 20987829
$15.49 MSRP: $24.27
You Save: $8.78 (37%)
Ships in 1-2 Business Days
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Product Specifications
- Other Name: SEAL, Exhaust Pipe; Converter & Pipe Seal
- Replaces: 15890981
- Item Weight: 0.60 Pounds
- Item Dimensions: 4.0 x 4.1 x 1.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 20987829
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2021 GMC Sierra 3500 HD Submodels:
- AT4, Base, Denali, Pro, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS
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2021 GMC Sierra 3500 HD Gasket Assembly, Exh Manif
Part Number: 12705094
$26.33 MSRP: $41.25
You Save: $14.92 (37%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Exhaust Manifold Gasket, Manifold Gasket
- Replaces: 12676148
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12705094
- Warranty: This genuine part is guaranteed by GM's factory warranty.
Fits the following 2021 GMC Sierra 3500 HD Submodels:
- AT4, Base, Denali, Denali Ultimate, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL
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2021 GMC Sierra 3500 HD Gasket, Exhaust System Front
Part Number: 12672822
$1.49 MSRP: $2.22
You Save: $0.73 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Gasket, Exh Sys Frt; Exhaust Pipe Gasket
- Position: Front
- Item Weight: 0.30 Pounds
- Item Dimensions: 4.4 x 4.3 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12672822
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2021 GMC Sierra 3500 HD Submodels:
- AT4, Base, Denali, Denali Ultimate, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL
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2021 GMC Sierra 3500 HD Gasket, Exhaust System Front
Part Number: 12671767
$2.37 MSRP: $3.53
You Save: $1.16 (33%)
Ships in 1-3 Business Days
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Product Specifications
- Other Name: Gasket, Exh Sys Frt; Injector Gasket
- Position: Front
- Item Weight: 0.60 Pounds
- Item Dimensions: 1.3 x 1.3 x 0.2 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 12671767
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2021 GMC Sierra 3500 HD Submodels:
- AT4, Base, Denali, Denali Ultimate, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL
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2021 GMC Sierra 3500 HD Seal, Exhaust System
Part Number: 84013962
$7.75 MSRP: $11.53
You Save: $3.78 (33%)
Ships in 1-3 Business Days
ADD TO CART
Product Specifications
- Other Name: Seal, Exh Sys; Converter & Pipe Seal
- Item Weight: 0.50 Pounds
- Item Dimensions: 4.8 x 4.7 x 1.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 84013962
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2021 GMC Sierra 3500 HD Submodels:
- AT4, Base, Denali, Denali Ultimate, Pro, SLE, SLT | 8 Cyl 6.6 L DIESEL
View related parts
2021 GMC Sierra 3500 HD Seal,Exhaust Manifold Pipe
Part Number: 15077362
Product Specifications
- Other Name: SEAL, Exhaust Pipe; Converter & Pipe Seal, Flange Gasket
- Replaces: 15715548
- Item Weight: 0.30 Pounds
- Item Dimensions: 4.0 x 3.9 x 0.4 inches
- Condition: New
- Fitment Type: Direct Replacement
- SKU: 15077362
- Warranty: This genuine part is guaranteed by GM's factory warranty.
More Info
Fits the following 2021 GMC Sierra 3500 HD Submodels:
- AT4, Base, Denali, Pro, SLE, SLT, WT | 8 Cyl 6.0 L CNG, 8 Cyl 6.0 L FLEX, 8 Cyl 6.0 L GAS, 8 Cyl 6.6 L FLEX, 8 Cyl 6.6 L GAS

2021 GMC Sierra 3500 HD Exhaust Flange Gasket

Achieve unprecedented performance experience with our genuine 2021 GMC Sierra 3500 HD Exhaust Flange Gasket. All our parts are engineered for a perfect fit and maximum durability to ensure that your Sierra 3500 HD returns to factory condition. Specially designed for the 2021 GMC Sierra 3500 HD, this Exhaust Flange Gasket offers superior reliability and ease of installation for anyone.

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