✓ In Stock
1984-1997 Harley-Davidson Big Twin Evo Big Bore Top End Gasket Kit .040" - FKM Rubber MLS Steel
$79.12
Prices are in USD. Shipping calculated at checkout.
Fitment Verified
Warranty Included
30-Day Returns
This big bore top end gasket kit provides a complete sealing solution for Harley-Davidson Evolution engines with increased cylinder bores. The set features .040" thick FKM rubber-coated stainless steel head gaskets and Viton rubber rocker seals to maintain maximum heat resistance and oil retention. Every component is manufactured to precise standards to ensure a reliable fit and long-term protection against leaks during high-performance engine operation.
This kit fits 1984-1997 Harley-Davidson Evolution Big Twin models, including Softail, Touring, and Dyna applications such as Fat Boy, Heritage Softail, Electra Glide, and Super Glide.
What's Included in this Kit
✓
BIG TWIN SUB KIT
× 1
✓
Seal, Intake Manifold
2699586B - Rubber
× 2
✓
Carburetor Gaskets Touring, FX, Sportster & FXR
2905877FM - Foamet
× 1
✓
Carburetor Gaskets Sportster, Touring, Softail & Dyna
2905988 - Interface
× 1
✓
O-ring, Cylinder Head Locating, Use with Evo® Head Gaskets
2643276A - Rubber
× 4
✓
Gasket, Exhaust Pipe to Cylinder Head, Flat Style
6532483M - Steel
× 2
✓
Seal, Carburetor to Manifold
2700289 - Rubber
× 1
✓
Valve Stem Seal Touring, Softail, Dyna & Trike
VSHA2V - FKM Rubber - 5/16 Stem / .420 Guide
× 4
✓
Cylinder Base Gasket. Evolution 3-5/8 Big Bore Gasket
9730 - NBR Rubber Coated Single Steel
× 2
✓
Seal, Umbrella Valve, Rocker Cover Breather
2685689 - Rubber
× 2
✓
Big Bore Head Gasket - Big Twin
GBTMLSBB040 - FKM Rubber Coated Multi Layer Stainless Steel
× 2
✓
O-ring, Tappet Guide to Pushrod Cover
11145
× 4
✓
O-Ring, Pushrod Tube Covers & Multi Use
11132 - Rubber
× 4
✓
Rocker Base Gasket Fits Big Twin & Sportster
1680084 - Single Layer Steel
× 2
✓
Rocker Box Kit Early Evolution Big Twin
RKBTEV - FKM Rubber
× 1
✓
Washer, Top Rocker Cover
6114 - Copper
× 8
✓
Washer, Rocker Cover Screws
6385849FM - Foamet
× 8
✓
O-ring, Viton Pushrod Cover to Cylinder Head
11190
× 4
All items shipped together in one package.
Weight
0.828500
Parts Type
Top-End Gasket Kit
Sold As
Kit
Application Type
Stock Replacement
Material
FKM Rubber Coated Multi-Layer Stainless Steel
# of Layers
3
Head Gasket Thickness:
.040" (Compressed)
Head Gasket Bore Size
3.8125" - Big Bore
Compatible Models
21 Fits
Softail
1984–1991
9 models
▼
Touring
1984–1991
8 models
▼
Dyna
1991–1997
4 models
▼
⚠ Always verify fitment before ordering.