Cometic engine-only gasket kit, EST. Diameter 3-1/2"

With .040" multi-layer steel (MLS) cylinder head gaskets.
This EST (End Seal Technology) gasket set includes all the gaskets, seals and O-rings used on the specific H-D model mentioned, excluding the primary gaskets.
It's the easy way to do a complete overhaul and have all the gaskets you need in one package for reassembling the engine.
This EST gasket set contains MLS (Multi-Layer Steel) cylinder head gaskets that eliminate the use of O-rings for alignment dowels.
The base gaskets are .020" thick SLS (Single Layer Steel).
They have .005" high-temperature Viton rubber on both sides and are the toughest on the market.
The rocker cover gaskets are also .020" thick SLS. They do not leak, extrude, break or become brittle over time.
The exhaust gaskets do not obstruct exhaust gas flow or fray in the exhaust port.
The valve seals use Viton rubber and outer springs for a perfect seal.
- MLS = Multi-Layer Steel explained:
Consists of a top and bottom layer of resilient stainless steel, covered by high temperature rubber on both sides. The inner ring is also stainless steel. These 3 layer gaskets are riveted together, outside of the sealing surface, for ease of installation. MLS head gaskets eliminate the use of o-rings for alignment dowels.


Specifications


Brand
Cometic


Application
84-91 Big Twin (NU)


Sales unit
Kit


Material
Multi-Layer Metal


Packaging weight
0.486 kg


HS Code
84849000


Motorcycle family
BIG TWIN, FX, FXR, SOFTAIL, TOURING


Original name
Cometic, EST motor only gasket kit. 3-1/2" bore