521
CLASSIC
Big Bore Gasket Kit fits all 3⁵⁄₈” cylin-
ders. Kit includes two veloprene coat-
ed gaskets and 2 base gaskets.
GB James Fits
15-0886 15-0599 Shovelhead
—
15-0877 Evo
Magnum Cylinder Small Parts Kit for installing 3⁵⁄₈” barrels
on Shovelhead cases. Includes two (2) head gaskets, one
each front and rear cylinder base gasket, eight (8) cylinder
base nuts, and ten (10) head bolts with washers.
VT No. Item
11-0510 Complete kit
15-0599 Gasket set
8618-20 Black bolt set
8714-20 Chrome bolt set
8600-8 Chrome base nuts
8601-8 Black base nuts
11-0510
8601-8
8618-20
Metal Cylinder Base Gasket has a steel base
metal which has been coated on both sides with a
specially formulated high temperature oil resistant
rubber compound. Silicone beading around the inner
and outer perimeter forms a seal on both sides of
gasket, pairs.
(Shovelhead 3⁵⁄₈” Big Bore .020 Thick)
VT No. 15-1122
Replica Knucklehead Cylinder Sets
feature iron cast construction, original
markings with black painted finish and
are pre-fitted with cast pistons and
Hastings rings.
VT No. Year
Fits Compression
11-0506 1936-47 61” 7.5:1
11-0507 1941-47 74” 8.5:1
11-0506
11-0506
Replica Details!
Knucklehead Replacement Cylinder and Piston Kits are
honed and pre-fitted with stock compression cast pistons and
Hastings Rings. They are ready to run and will require break-in
as suggested in the appropriate shop manual. Sold in pairs for
stock stroke only. Order gasket set separately.
VT No. Year
Fits
Compression
11-2600 1936-47
61”
7.5:1
11-2601 1941-47
74”
8.5:1
11-2601
3⁵₈” Shovel Cylinders
Knucklehead Replacement Cylinders Only for stock
bore, stock stroke and compression. Must be honed to
standard size for proper fit. Sold each without piston.
VT No. OEM
Type Year
Fits
11-0495 16483-36 Front 1936-47 61”
11-0494 16490-36 Rear 1936-47 61”
11-0499 16483-41 Front 1941-47 74”
11-0498 16491-41 Rear 1941-47 74”
15-0886
3⁵⁄₈” Cylinders sold as a kit with 7.5:1 pistons, rings, gaskets,
head bolts and cylinder base nuts. Also available as cylinder
set only. Requires case boring and installation.
Stock Cylinder
VT No.
Item
Brand
11-0380* Cylinder Set, Sifton Note: Honed to size
11-0297 Cylinder Kit
Sifton
11-0283 Piston
Kit
11-0252 Rings
Set
.200 Longer Cylinder
VT No.
Item
Brand
11-0385* Cylinder Set, Sifton Note: Honed to size
11-0289 Cylinder Kit
Sifton
*Note: Order pistons separately.
11-0499
Knucklehead
Cylinder Kit
11-0297
11-0380
15-0877