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Cometic Gaskets for Cylinder Head: Evolution 3-1/2 ” Bore

Cometic Gaskets for Cylinder Head: Evolution 3-1/2 ” Bore

  • for Cylinder head
  • fits Sportster 1200 cc 1988-2020, Big Twin 1984-1998 (Softail →1999)
  • steel / fluoroelastomer
  • nominal bore: 3-1/2 ”
  • replaces Harley-Davidson part number 16770-84, and 16773-85

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.

Item №
Version
Price incl. VAT*
unit
Availability in warehouse Germany
Cometic Gaskets for Cylinder Head: Evolution 3-1/2 ” Bore
58-240
0.030” thick
63.30 €
pair
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Cometic Gaskets for Cylinder Head: Evolution 3-1/2 ” Bore
58-241
0.040” thick
63.30 €
pair
Go to article
* The price includes German VAT (19% or reduced rate of 7% for Books).

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