fits  55-62 FL Panhead (NU)

Fully assembled Panhead style cylinder head set. Great to breathe life into a tired Panhead or to build a new custom Panhead engine. Comes with Panhead exhaust and larger Shovelhead intake valves for improved breathing. All valve guides are cast iron for best longevity, valves are nitrated and valve seals are used on all valves. Complete with springs and collars that allow a maximum valve lift of .425″. The aluminum casting are OEM style with stock O-ring type manifold intake and stock exhaust ports. Max lift is .425″. – Assembled heads – Cast iron valve guides – Nitrated valves – Valve seals on all guides – Maximum valve lift .425″ – Panhead intake valves – Shovel exhaust valves – 75-up Shovel long reach style spark plugs – Used with OEM style Panhead headers – For O-ring style manifold

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Home > Parts > Engine > Top End > Cylinder Heads > Panhead assembled cylinder head set

fits  84-99 Evo Big Twin (NU)

3.5″ bore. Includes cylinder head & base gaskets to service one bike. With .040″ thick copper head gaskets (91.5mm diameter) and .012″ thick aluminum style ‘A’ (late style) base gaskets (94mm diameter). OEM replacement reference 16773-85 & 16770-84D head gaskets and 16774-84A type ‘A’ base gaskets. Type ‘A’ (early style) and type ‘B’ (late style) gaskets explained: There are 2 types of cylinder base gaskets for Evolution models available. For convenience sake we’ll call them ‘type A’ (early) and ‘type B’ (late). *Type A’ gasket was introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 1340cc Evo models and will follow the contours of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base. This can be a problem with silicone beaded base gaskets. *Type B’ gasket was introduced on Evolution XL Sportster models in 1986, and will fit all Evo XL models, but also all 84-99 Evo 1340cc models although the Big Twin cylinder base is a bit larger than the gasket. The ‘type B’ is the only gasket type that ‘The Factory’ supplied from 1986 onwards for both Evo Big Twin and Evo XL Sportster models. Both type ‘A’ and type ‘B’ have identical inner bore diameter, oil hole and stud hole locations. Gaskets for front & rear cylinder are identical. Only difference between the ‘A’ & ‘B’ gaskets is the outside perimeter.

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Home > Parts > Engine > Top End > Cylinder Heads > Athena, head & base gasket kit. Type ‘A’

fits  84-99 Evo Big Twin; 86-22 XL Sportster (Excl. XR1200) (NU)

3.5″ bore. Includes cylinder head & base gaskets to service one bike. With .040″ thick copper head gaskets (94mm diameter) and .012″ thick aluminum style ‘A’ (late style) base gaskets (100mm diameter). Type ‘A’ (early style) and type ‘B’ (late style) gaskets explained: There are 2 types of cylinder base gaskets for Evolution models available. For convenience sake we’ll call them ‘type A’ (early) and ‘type B’ (late). *Type A’ gasket was introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 1340cc Evo models and will follow the contours of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base. This can be a problem with silicone beaded base gaskets. *Type B’ gasket was introduced on Evolution XL Sportster models in 1986, and will fit all Evo XL models, but also all 84-99 Evo 1340cc models although the Big Twin cylinder base is a bit larger than the gasket. The ‘type B’ is the only gasket type that ‘The Factory’ supplied from 1986 onwards for both Evo Big Twin and Evo XL Sportster models. Both type ‘A’ and type ‘B’ have identical inner bore diameter, oil hole and stud hole locations. Gaskets for front & rear cylinder are identical. Only difference between the ‘A’ & ‘B’ gaskets is the outside perimeter.

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Home > Parts > Engine > Top End > Cylinder Heads > Athena, head & base gasket kit. Type ‘B’

fits  84-99 Evo Big Twin (NU)

Includes cylinder head & base gaskets to service one bike. With .040″ (94mm diameter) copper head and .012″ (100mm diameter) aluminum style ‘A’ (late style) base gaskets. OEM replacement reference 16774-84A base gaskets and 16773-85 & 16770-84D head gaskets. Type ‘A’ (early style) and type ‘B’ (late style) gaskets explained: There are 2 types of cylinder base gaskets for Evolution models available. For convenience sake we’ll call them ‘type A’ (early) and ‘type B’ (late). *Type A’ gasket was introduced on the 1984 Evolution Big Twin models, and can be used on all of the 84-99 1340cc Evo models and will follow the contours of the cylinder base perfectly. They will fit 86-22 Evo XL, but stick out at the cylinder base. This can be a problem with silicone beaded base gaskets. *Type B’ gasket was introduced on Evolution XL Sportster models in 1986, and will fit all Evo XL models, but also all 84-99 Evo 1340cc models although the Big Twin cylinder base is a bit larger than the gasket. The ‘type B’ is the only gasket type that ‘The Factory’ supplied from 1986 onwards for both Evo Big Twin and Evo XL Sportster models. Both type ‘A’ and type ‘B’ have identical inner bore diameter, oil hole and stud hole locations. Gaskets for front & rear cylinder are identical. Only difference between the ‘A’ & ‘B’ gaskets is the outside perimeter.

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Home > Parts > Engine > Top End > Cylinder Heads > Athena, cylinder head & base gasket kit. Copper

fits  74-78 Harley-Davidson / Cagiva SS / SX 175cc

Fits 175cc two stroke models

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Home > Parts > Engine > Top End > Cylinder Heads > Athena, cylinder head gasket H-D / Cagiva

fits  06-16 Twin Cam with stock crankcases (NU)

High performance cylinder head kit that works well with stock up to 110″ capacity. 89cc combustion chamber provides a slightly higher than stock, but still manageable compression ratio in larger than stock engines. A good choice for touring bikes and other heavy bikes. The installed S&S High performance valve springs allow the installation of camshafts with up to .650″ lift. Compatible with stock bolt pattern crancases, rocker boxes, exhaust, and intake manifolds. Machined for S&S electric or manual compression releases (sold separately, if required). The large 2.000″ intake and 1.605″ exhaust valves maintain port velocity for good low and midrange response, but supply enough air for slightly larger engines to perform to their full potential. Intake ports flow 264 cfm (Cubic Feet per Minute) of air compared to stock heads at 182cfm. The wrinkle black powder coat finish to match stock black engine components.

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Home > Parts > Engine > Top End > Cylinder Heads > S&S, cylinder head kit. Black .650″ lift

fits  00-06 Softail; 00-05 Dyna (NU)

Grade 8 reproduction of 3737 bolts and 6516HW hardened washers. 7/16-14 x 2-1/4″ .

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Home > Parts > Engine > Top End > Cylinder Heads > Bolt Covers > Colony, head bolt & washer kit. Zinc plated

fits  18-25 Softail; 17-25 FLT/Touring, 17-25 Trikes

Includes everything that’s required to do a complete (4) 597871 S&S roller rocker arm rebuild.

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Home > Parts > Engine > Top End > Cylinder Heads > S&S, M8 roller rocker arm rebuild kit

fits  26-32 H-D A&B Singles; 29-50 45″ SV. With iron heads (NU)

Black parkerized. Incl. 4 reproduction oversized studs. 3/8-16 to 7/16-24 threaded. Accurately machined from high strength steel and hardened to OEM specifications to prevent stretching. Rolled threads for superior strength and fit. Repl. 14-26S (16801-26).

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Home > Parts > Engine > Top End > Cylinder Heads > Colony, cylinder head stud kit. Oversized

fits  99-16 FLT/Touring, 99-17 Dyna, Softail (NU)

Fits 99-17 TCA/B, early 99-10 style. Complete kit for one engine. Properly sized breather holes for optimum engine breathing. Machined from billet 6061 aluminum with square surfaces promoting excellent gasket and breather system sealing. Kits include: billet breather housings, gaskets, breather filter elements, umbrella valves and ARP hardware. Note: Repl. 17025-03A, 17650-02 and 17650-03A. Kit includes old H-D numbers: 17595-99, 17596-99, 26858-99, 63815-99.

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Home > Parts > Engine > Top End > Cylinder Heads > Feuling, rocker box breather cover kit