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Gaskets for Cylinder Head: Twin Cam 3-3/4 ” Bore
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55-420
- for Cylinder head
- fits Twin Cam 88 and 96
- metal/graphite compound / PTFE
- nominal bore: 3-3/4 ”
- 0.036” thick
- replaces Harley-Davidson part number 16775-99
- gross weight: 20 g
Firering Gaskets
Thermally high stressed areas of the gasket — like the gap between cylinder barrel and head — are sheathed by a metal reinforcement ring.
Thin Head Gaskets
An easy way to increase compression ratio a tad is to install thinnner head gaskets. A snappier exhaust note and a more efficient combustion can be expected.
Example: using a .030" head gasket in lieu of a .045" will increase compression by approx. 0.25 points. So if your CR with a .045" head gasket is 9.6, the static CR will increase to 9.85 with a .030" head gasket. Valve to piston clearance must be checked where appropriate.
Have any questions?
Our service team will be glad to help out: Mondays - Thursdays 08:00-17:00 CET, Fridays 08:00-16:00 CET, Phone: +49 / 931 250 61 16, eMail: service@wwag.com