C9974 EST motor only gasket kit. 3-13/16" big bore
Fits: 92-99 Big Twin (Excl. 1999 Twin Cam…
incl. VAT
Chapter members save 15% · Sign in for member pricing
Estimated delivery: 3–15 working days
Authorised
Iron City Dealer
14-Day Returns
Easy & hassle-free
Secure Checkout
256-bit encryption
Free UK Delivery
On orders over £100
Specifications
- Brand
- Cometic
- Part Number
- C9974
- OEM Reference
- —
- Pack Quantity
- Each
- Category
- Gasket Sets Motor
- VAT Rate
- 20%
About This Product
For riders running a 3-13/16 inch big bore setup on 1992 to 1999 Evolution Big Twin models, this Cometic Extreme Sealing Technology (EST) kit is the professional choice for a top-end or full motor rebuild. This kit includes all necessary gaskets, seals, and O-rings for the engine, excluding the primary. It features .040-inch Multi-Layer Steel (MLS) head gaskets that provide an exceptional seal without the need for dowel pin O-rings. The base and rocker gaskets are made from .020-inch Single Layer Steel with a Viton rubber coating, designed to resist weeping and embrittlement over time. This comprehensive set ensures your big-bore Evo stays tight and leak-free under the increased pressures of a performance build.
Manufacturer part number: C9974.
Fitment
24 models92-99 Big Twin (Excl. 1999 Twin Cam)
Dyna 6 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1992 | Dyna Daytona FXDB |
| Harley-Davidson | 1993–1999 | Dyna Low Rider FXDL |
| Harley-Davidson | 1995–1996 | Dyna Super Glide Convertible FXDS |
| Harley-Davidson | 1995–1999 | Dyna Super Glide FXD |
| Harley-Davidson | 1993–1999 | Dyna Wide Glide FXDWG |
| Harley-Davidson | 1992 | Super Glide Custom FXDC |
FXR 3 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1992 | Low Rider Convertible FXRS |
| Harley-Davidson | 1992 | Low Rider FXRS |
| Harley-Davidson | 1992–1994 | Super Glide FXR |
Softail 4 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1993–1996 | Heritage Softail Nostalgia FLSTN |
| Harley-Davidson | 1997–1999 | Heritage Springer FLSTS |
| Harley-Davidson | 1999 | Night Train FXSTB |
| Harley-Davidson | 1995–1997 | Springer Softail FXSTSB |
Super Glide 2 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1997–1999 | Dyna Super Glide Convertible FXDS |
| Harley-Davidson | 1993 | Super Glide Convertible FXRS |
Touring 9 models
| Brand | Year | Model |
|---|---|---|
| Harley-Davidson | 1992–1998 | Electra Glide Classic FLHTC |
| Harley-Davidson | 1996–1998 | Electra Glide Classic FLHTCI |
| Harley-Davidson | 1998–1999 | Road Glide FLTR |
| Harley-Davidson | 1998 | Road Glide FLTRI |
| Harley-Davidson | 1998 | Road King Classic FLHRCI |
| Harley-Davidson | 1993–1999 | Road King FLHR |
| Harley-Davidson | 1996–1997 | Road King FLHRI |
| Harley-Davidson | 1996 | Tour Glide Ultra Classic FLTCUI |
| Harley-Davidson | 1995–1998 | Ultra Classic FLHTCUI |
Related Products
View all →
James Gaskets
Motor gasket kit. 45" Flatheads
James Gaskets
Motor gasket kit. Panhead
James Gaskets
Motor gasket & seal kit. K model
James Gaskets
Motor gasket kit. Panhead
James Gaskets
Motor gasket & seal kit. XR1200
Cometic
EST motor gasket kit. Standard bore
James Gaskets
Motor gasket set. 1200/1340 Flatheads
James Gaskets
Motor gasket & seal kit. 900cc XL
More from Cometic
View all →
Cometic. gasket transmission shifter cover. Fiber
Gasket cam cover. .060" AFM
Primary cover gasket & seal kit. in/out. AFM
Gasket inspection cover. .062" AFM
Oil pump bocy to cover gasket. Fiber
Cylinder head gasket set. .030" MLS
Gasket transmission end cover. AFM
Gasket set, cylinder head. 3.5" bore .051" MLS
Who are we? Leeds Harley-Davidson - Iron City Motorcycles
This product is fulfilled by Iron City Motorcycles, Leeds' authorised Harley-Davidson® dealer, serving the UK with a full range of Genuine Motorclothes®, dealer merchandise, and official Harley-Davidson parts & accessories — available for UK and international delivery.
From OEM Parts to retro lifestyle wear to aftermarket stockits we have what you need to keep you riding all year round.
Use our official OEM parts finder to browse our full Genuine Harley-Davidson® Parts and our associated approved aftermarket catalogues.