Cylinder Parts Diagram Exploded View for Harley Twin Cam

Cylinder Parts Diagram Exploded View for Harley Twin Cam 1) 99-04 TCA/B. Valve keys (set of 8). Replaces OEM: 18229-83

Cylinder Parts Diagram Exploded View for Harley Twin Cam 2) 99-04 TCA/B. Andrews steel valve spring collar set, upper. Up to .560" lift. Replaces OEM: 18219-83A

Cylinder Parts Diagram Exploded View for Harley Twin Cam 3) 05-17 TCA/B. S&S valve spring set. Replaces OEM: 18245-02

Cylinder Parts Diagram Exploded View for Harley Twin Cam 5) 99-04 TCA/B. Manley viton valve stem seal, intake / exhaust (set of 24). Replaces OEM: 18001-83A/B

Cylinder Parts Diagram Exploded View for Harley Twin Cam 6) 99-04 TCA/B. Manley steel valve spring collars, lower (set of 4). Replaces OEM: 18222-83

Cylinder Parts Diagram Exploded View for Harley Twin Cam 7) 99-17 TCA/B. See valve guides separately.

Cylinder Parts Diagram Exploded View for Harley Twin Cam 8) 99-17 TCA/B (excl. 110"). KPMI Exhaust valve seat.

Cylinder Parts Diagram Exploded View for Harley Twin Cam 9) 99-17 TCA/B. See valves separately.

Cylinder Parts Diagram Exploded View for Harley Twin Cam 10) 99-17 TCA/B. Gardner-Westcott head bolt kit.

Cylinder Parts Diagram Exploded View for Harley Twin Cam 12) 99-17 TCA/B. Stud set, exhaust. Replaces OEM: 16715-83

Cylinder Parts Diagram Exploded View for Harley Twin Cam 14) 99-17 TCA/B. See cylinder heads separately. OEM style. Replaces OEM: 16716-99, 16717-99, 16722-99 & 16724-99

Cylinder Parts Diagram Exploded View for Harley Twin Cam 15) 99-03 TCA/B (cylinder stud head) & 99-06 TCA/B (cylinder stud base). James o-ring. Replaces OEM: 11273

Cylinder Parts Diagram Exploded View for Harley Twin Cam 13) 99-06 TCA/B (carb models) bolt temperature sensor plug. Replaces OEM: 4175

Cylinder Parts Diagram Exploded View for Harley Twin Cam 17) 99-17 TCA/B 88/96". James .045" firereing silicone head gasket, 3-3/4" (3.75") bore. Replaces OEM: 16775-99B

Cylinder Parts Diagram Exploded View for Harley Twin Cam 16) 99-17 TCA/B. S&S dowel pin, cylinder head/base. Replaces OEM: 16595-99A

Cylinder Parts Diagram Exploded View for Harley Twin Cam 18) 99-17 TCA/B. James o-ring, cylinder base. 3-3/4" to 3-7/8" bore. Replaces OEM: 11256

Cylinder Parts Diagram Exploded View for Harley Twin Cam 19) 99-17 TCA/B. KPMI cylinder stud set (set of 8). Replaces OEM: 16834-99A

Cylinder Parts Diagram Exploded View for Harley Twin Cam 20) See piston kits seaprately.

Cylinder Parts Diagram Exploded View for Harley Twin Cam 21) 07-17 TCA/B 96/103". Piston wrist pin. Replaces OEM: 22131-05

Cylinder Parts Diagram Exploded View for Harley Twin Cam 22) 99-17 TCA/B. Retaining ring wrist pin. Replaces OEM: 22097-99

Cylinder Parts Diagram Exploded View for Harley Twin Cam 23) 99-17 TCA/B 95/103". OEM style replacement cylinder, 3-7/8" (3.875") bore. Front or rear.

Cylinder Parts Diagram Exploded View for Harley Twin Cam 24) 99-06 TCA/B. Jims bushing, wrist pin (set of 2). .002" oversize. Replaces OEM: 24316-99

Cylinder Parts Diagram Exploded View for Harley Twin Cam 25) 05-17 TCA/B 88/96". James .045" top-end gasket kit, 3-3/4" big bore.

Passez votre souris pour zoomer Cliquez sur l'image pour zoomer

Diagramme des pièces du cylindre Vue éclatée pour Harley Twin Cam

Name: Diagramme des pièces du cylindre Vue éclatée pour Harley Twin Cam
Brand: Customhoj
SKU: A220-806625
Price: 14.95 EUR
Availability: InStock

BIKER FAVOURITE

CustomhojSKU: A220-806625

0 avis

Convient: 1) 99-04 TCA/B. Valve keys (set of 8). Replaces OEM: 18229-83

Variante

Prix:

€14,95

Taxes incluses Frais de port calculés au paiement

Stock:

Envoyé dans les 72 heures

Quantité:

Diagramme de pièces de cylindre Vue éclatée pour Harley Twin Cam Harley Davidson Twin Cam

Ces pièces de rechange pour cylindres conviennent aux modèles 99-16 Touring (TCA), 99-17 Dyna (TCA) et 00-17 Softail (TCB). L'abréviation TCA/B signifie qu'elles conviennent aux modèles TCA et TCB. Convient également aux modèles 14-17 à double refroidissement, sauf mention contraire.

Les pièces détachées sont listées avec des informations dans l'ordre suivant :

Numéro dans le diagramme de la vue éclatée
Compatibilité avec les modèles HD spécifiques
Description de la pièce de rechange
Numéro de référence de la pièce OEM

Remarque : Toutes les pièces sont vendues à l'unité, sauf indication contraire.
Note : Les pièces sont vendues à l'unité, sauf indication contraire : L'image est fournie à titre d'illustration uniquement, la vue éclatée peut différer selon le modèle.

Variant: 1) 99-04 TCA/B. Valve keys (set of 8). Replaces OEM: 18229-83
SKU: A220-806625
OEM: 18229-83A
DPN: 904220

Variant: 1) 05-17 TCA/B (excl. 110" models). Valve keys (set of 8). Replaces OEM: 18260-02
SKU: A221-806626
OEM: 18260-02
DPN: 904221

Variant: 2) 99-04 TCA/B. Andrews steel valve spring collar set, upper. Up to .560" lift. Replaces OEM: 18219-83A
SKU: A723-406128
MPN: 293115
DPN: 503723

Variant: 2) 99-04 TCA/B. Steel valve spring collars, upper (set of 4). Replaces OEM: 18219-83A
SKU: A698-412103
OEM: 18219-83A
DPN: 509698

Variant: 2) 99-04 TCA/B. Manley steel valve spring collars, upper (set of 4). Replaces OEM: 18219-83A
SKU: A887-416292
MPN: 99258-4
OEM: 18219-83A
DPN: 513887

Variant: 2) 99-04 TCA/B. Manley titanium valve spring collars, upper (set of 4). Replaces OEM: 18219-83A
SKU: A888-416293
MPN: 99259-4
OEM: 18219-83A
DPN: 513888

Variant: 2) 05-17 TCA/B (excl. 110" models). Jims chromoly valve spring collars, upper (set of 4). Replaces OEM: 18258-02
SKU: A587-880992
MPN: 1302
DPN: 978587

Variant: 3) 05-17 TCA/B. S&S valve spring set. Replaces OEM: 18245-02
SKU: A561-438966
MPN: 900-0594
OEM: 18245-02
DPN: 536561

Variant: 3) 99-04 TCA/B. Jims valve spring (set of 4). Replaces OEM: 18202-83 & 18201-83
SKU: A085-880490

Variant: 5) 99-04 TCA/B. Manley viton valve stem seal, intake / exhaust (set of 24). Replaces OEM: 18001-83A/B
SKU: A982-416387
MPN: 99183-24
OEM: 18001-83B
DPN: 513982

Variant: 5) 05-17 TCA/B. Manley viton valve stem seal, intake / exhaust (set of 4). Replaces OEM: 18094-02A
SKU: A983-416388
MPN: 99184-4
OEM: 18094-02A
DPN: 513983

Variant: 5) 05-17 TCA/B. KPMI viton valve stem seal, intake / exhaust (set of 4). Replaces OEM: 18094-02A
SKU: A619-427024
MPN: 71030-4
OEM: 18094-02A
DPN: 524619

Variant: 5) 05-17 TCA/B. James viton valve stem seal, intake / exhaust (set of 4). Replaces OEM: 18094-02A
SKU: A032-428437
MPN: 18094-02
OEM: 18094-02A
DPN: 526032

Variant: 5) 99-04 TCA/B. James viton valve stem seal, intake / exhaust (set of 4). Replaces OEM: 18001-83A/B
SKU: A165-428570
MPN: 18001-83-A
DPN: 526165

Variant: 5) 99-04 TCA/B. Cometic viton valve stem seal, intake / exhaust. Replaces OEM: 18001-83A/B
SKU: A159-463564
MPN: C9836
DPN: 561159

Variant: 5) 05-17 TCA/B. Cometic viton valve stem seal, intake / exhaust. Replaces OEM: 18094-02A
SKU: A532-463937
MPN: C9153
OEM: 18094-02A
DPN: 561532

Variant: 5) 99-04 TCA/B. S&S viton valve stem seal, intake / exhaust (set of 8). Replaces OEM: 18001-83A/B
SKU: A948-880353
MPN: 90-2158
OEM: 18001-83B
DPN: 977948

Variant: 6) 99-04 TCA/B. Manley steel valve spring collars, lower (set of 4). Replaces OEM: 18222-83
SKU: A786-416191
MPN: 99234-4
DPN: 513786

Variant: 6) 99-04 TCA/B. Steel valve spring collars, lower (set of 4). Replaces OEM: 18222-83
SKU: A283-884688
OEM: 18222-83
DPN: 982283

Variant: 7) 99-17 TCA/B. See valve guides separately.
SKU: A000-DISCONTINUED

Variant: 8) 99-17 TCA/B (excl. 110"). KPMI Exhaust valve seat.
SKU: A555-426960
MPN: 10-SC446
OEM: 18011-86
DPN: 524555

Variant: 8) 99-17 TCA/B (excl. 110"). KPMI Intake valve seat.
SKU: A558-426963
MPN: 10-SC500
OEM: 18020-83
DPN: 524558

Variant: 9) 99-17 TCA/B. See valves separately.
SKU: A000-DISCONTINUED

Variant: 10) 99-17 TCA/B. Gardner-Westcott head bolt kit.
SKU: A718-410123
MPN: A-61-110
DPN: 507718

Variant: 10) 99-17 TCA/B. Colony head bolt kit.
SKU: A600-892005
MPN: 2012-8
OEM: 16480-92A
DPN: 989600

Variant: 12) 99-17 TCA/B. Stud set, exhaust. Replaces OEM: 16715-83
SKU: A715-819120
OEM: 16715-83
DPN: 916715

Variant: 13) 99-06 TCA/B (carb models) bolt temperature sensor plug. Replaces OEM: 4175
SKU: A000-DISCONTINUED

Variant: 14) 99-17 TCA/B. See cylinder heads separately. OEM style. Replaces OEM: 16716-99, 16717-99, 16722-99 & 16724-99
SKU: A000-DISCONTINUED

Variant: 15) 99-03 TCA/B (cylinder stud head) & 99-06 TCA/B (cylinder stud base). James o-ring. Replaces OEM: 11273
SKU: A712-413117
MPN: 11273
OEM: 11273
DPN: 510712

Variant: 15) 99-03 TCA/B (cylinder stud head) & 99-06 TCA/B (cylinder stud base). Cometic o-ring. Replaces OEM: 11273
SKU: A300-463705
MPN: C9438
OEM: 11273
DPN: 561300

Variant: 16) 99-17 TCA/B. S&S dowel pin, cylinder head/base. Replaces OEM: 16595-99A
SKU: A104-823509
MPN: 50-8177
OEM: 16595-99A
DPN: 921104

Variant: 16) 99-17 TCA/B. KPMI dowel pin, cylinder head/base (set of 4). Replaces OEM: 16595-99A
SKU: A019-827424
MPN: 83080-4
OEM: 16595-99A
DPN: 925019

Variant: 17) 99-17 TCA/B 88/96". James .045" firereing silicone head gasket, 3-3/4" (3.75") bore. Replaces OEM: 16775-99B
SKU: A701-421106
MPN: 16775-99
OEM: 16775-99B
DPN: 518701

Variant: 17) 99-17 TCA/B 88/96". James .036" firereing silicone head gasket, 3-3/4" (3.75") bore. Replaces OEM: 16775-99B
SKU: A704-421109
MPN: 16775-99-X
DPN: 518704

Variant: 17) 14-16 TCA 103" Twin Cooled. Cometic .027" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16500066
SKU: A111-463516
MPN: C10081
OEM: 16500066
DPN: 561111

Variant: 17) 14-16 TCA 103" Twin Cooled. Cometic .030" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16500066
SKU: A112-463517
MPN: C10081-030
OEM: 16500066
DPN: 561112

Variant: 17) 14-16 TCA 103" Twin Cooled. Cometic .036" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16500066
SKU: A113-463518
MPN: C10081-036
OEM: 16500066
DPN: 561113

Variant: 17) 14-16 TCA 103" Twin Cooled. Cometic .040" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16500066
SKU: A114-463519
MPN: C10081-040
OEM: 16500066
DPN: 561114

Variant: 17) 14-16 TCA 103" Twin Cooled. Cometic .045" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16500066
SKU: A135-463540
MPN: C10081-045
OEM: 16500066
DPN: 561135

Variant: 17) 14-16 TCA Twin Cooled. Cometic .027" MLS head gasket, 4" bore (set of 2).
SKU: A139-463544
MPN: C10084
DPN: 561139

Variant: 17) 99-17 TCA/B 88/96". Cometic .030" MLS head gasket, 3-3/4" (3.75") bore (set of 2). Replaces OEM: 16775-99B
SKU: A140-463545
MPN: C9790
DPN: 561140

Variant: 17) 99-17 TCA/B 88/96". Cometic .040" MLS head gasket, 3-3/4" (3.75") bore (set of 2). Replaces OEM: 16775-99B
SKU: A141-463546
MPN: C9745
DPN: 561141

Variant: 17) 99-17 TCA/B 95/103" (excl. twin cooled). Cometic .030" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16787-99A
SKU: A142-463547
MPN: C9721
DPN: 561142

Variant: 17) 99-17 TCA/B 95/103" (excl. twin cooled). Cometic .040" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16787-99A
SKU: A143-463548
MPN: C9722
DPN: 561143

Variant: 17) 99-17 TCA/B (excl. twin cooled). Cometic .030" MLS head gasket, 4" bore (set of 2).
SKU: A144-463549
MPN: C9725
DPN: 561144

Variant: 17) 99-17 TCA/B (excl. twin cooled). Cometic .040" MLS head gasket, 4" bore (set of 2).
SKU: A145-463550
MPN: C9726
DPN: 561145

Variant: 17) 99-17 TCA/B 95/103" (excl. twin cooled). Cometic .060" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16787-99A
SKU: A146-463551
MPN: C9135
DPN: 561146

Variant: 17) 14-16 TCA Twin Cooled. Cometic .030" MLS head gasket, 4" bore (set of 2).
SKU: A147-463552
MPN: C10084-030
DPN: 561147

Variant: 17) 14-16 TCA Twin Cooled. Cometic .036" MLS head gasket, 4" bore (set of 2).
SKU: A148-463553
MPN: C10084-036
DPN: 561148

Variant: 17) 14-16 TCA Twin Cooled. Cometic .040" MLS head gasket, 4" bore (set of 2).
SKU: A149-463554
MPN: C10084-040
DPN: 561149

Variant: 17) 99-17 TCA/B 88/96". Cometic .060" MLS head gasket, 3-3/4" (3.75") bore (set of 2). Replaces OEM: 16775-99B
SKU: A157-463562
MPN: C9158
DPN: 561157

Variant: 17) 99-17 TCA/B 95/103" (excl. twin cooled). Cometic .027" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16787-99A
SKU: A158-463563
MPN: C9721-027
DPN: 561158

Variant: 17) 99-17 TCA/B 88/96". Cometic .051" MLS head gasket, 3-3/4" (3.75") bore (set of 2). Replaces OEM: 16775-99B
SKU: A179-463584
MPN: C9157
DPN: 561179

Variant: 17) 99-17 TCA/B 88/96". Cometic .045" MLS head gasket, 3-3/4" (3.75") bore (set of 2). Replaces OEM: 16775-99B
SKU: A192-463597
MPN: C9181
OEM: 16775-99B
DPN: 561192

Variant: 17) 99-17 TCA/B (excl. twin cooled). Cometic .040" MLS head gasket, 4-1/8" (4.125") bore (set of 2).
SKU: A226-463631
MPN: C9743
DPN: 561226

Variant: 17) 99-17 TCA/B (excl. twin cooled). Cometic .030" MLS head gasket, 4-1/8" (4.125") bore (set of 2).
SKU: A228-463633
MPN: C9910
DPN: 561228

Variant: 17) 14-16 TCA Twin Cooled. Cometic .045" MLS head gasket, 4" bore (set of 2).
SKU: A229-463634
MPN: C10084-045
DPN: 561229

Variant: 17) 99-17 TCA/B 95/103" (excl. twin cooled). Cometic .036" MLS head gasket, 3-7/8" (3.875") bore (set of 2). Replaces OEM: 16787-99A
SKU: A781-464186
MPN: C9721-036
DPN: 561781

Variant: 17) 99-17 TCA/B (excl. twin cooled). Cometic .045" MLS head gasket, 4" bore (set of 2).
SKU: A783-464188
MPN: C9726-045
DPN: 561783

Variant: 17) 99-17 TCA/B (excl. twin cooled). Cometic .051" MLS head gasket (set of 2), 4-1/8" (4.125") bore.
SKU: A784-464189
MPN: C9743-051
DPN: 561784

Variant: 17) 99-17 TCA/B 95/103" (excl. twin cooled). Cometic .027" copper head gasket, 3-7/8" (3.875") bore. Replaces OEM: 16787-99A
SKU: A000-DISCONTINUED

Variant: 18) 99-17 TCA/B. James o-ring, cylinder base. 3-3/4" to 3-7/8" bore. Replaces OEM: 11256
SKU: A703-421108
MPN: 11256
OEM: 11256
DPN: 518703

Variant: 18) 99-17 TCA/B. Cometic o-ring, cylinder base. 3-3/4" to 3-7/8" bore. Replaces OEM: 11256
SKU: A160-463565
MPN: C9628
OEM: 11256
DPN: 561160

Variant: 18) 99-17 TCA/B. Cometic .010" SLS gasket (set of 2), cylinder base (replaces stock o-ring). 4" bore. Replaces OEM: 11256
SKU: A511-463916
MPN: C9937
DPN: 561511

Variant: 18) 99-17 TCA/B. Cometic .020" SLS gasket (set of 2), cylinder base (replaces stock o-ring). 4" bore. Replaces OEM: 11256
SKU: A512-463917
MPN: C9738
DPN: 561512

Variant: 18) 99-17 TCA/B. Cometic .010" SLS gasket (set of 2), cylinder base (replaces stock o-ring). 4-1/8" (4.125") bore. Replaces OEM: 11256
SKU: A513-463918
MPN: C9938
DPN: 561513

Variant: 18) 99-17 TCA/B. Cometic .020" SLS gasket (set of 2), cylinder base (replaces stock o-ring). 4-1/8" (4.125") bore. Replaces OEM: 11256
SKU: A514-463919
MPN: C9739
DPN: 561514

Variant: 18) 99-17 TCA/B. S&S o-ring, cylinder base. 3-3/4" to 3-7/8" bore. Replaces OEM: 11256
SKU: A142-817547
MPN: 50-8048
OEM: 11256
DPN: 915142

Variant: 18) 99-17 TCA/B. S&S o-ring, cylinder base. 4" bore. Replaces OEM: 11256
SKU: A143-817548
MPN: 50-8049
DPN: 915143

Variant: 19) 99-17 TCA/B. KPMI cylinder stud set (set of 8). Replaces OEM: 16834-99A
SKU: A581-426986
MPN: 20-20412
OEM: 16834-99A
DPN: 524581

Variant: 19) 99-17 TCA/B. S&S cylinder stud set (set of 8). Replaces OEM: 16834-99A
SKU: A544-433949
MPN: 31-2340
OEM: 16834-99A
DPN: 531544

Variant: 19) 99-17 TCA/B. Colony cylinder stud set (set of 8). Replaces OEM: 16834-99A
SKU: A130-891535
MPN: 2083-8
OEM: 16834-99A
DPN: 989130

Variant: 20) See piston kits seaprately.
SKU: A000-DISCONTINUED

Variant: 21) 07-17 TCA/B 96/103". Piston wrist pin. Replaces OEM: 22131-05
SKU: A000-DISCONTINUED

Variant: 21) 99-06 88" TCA/B. Piston wrist pin. Replaces OEM: 22132-99
SKU: A000-DISCONTINUED

Variant: 22) 99-17 TCA/B. Retaining ring wrist pin. Replaces OEM: 22097-99
SKU: A080-823485
OEM: 22097-99
DPN: 921080

Variant: 23) 99-17 TCA/B 95/103". OEM style replacement cylinder, 3-7/8" (3.875") bore. Front or rear.
SKU: A191-479596
DPN: 577191

Variant: 23) 99-17 TCA/B 88/96". OEM style replacement cylinder, 3-3/4" (3.75") bore. Front or rear.
SKU: A192-479597
DPN: 577192

Variant: 24) 99-06 TCA/B. Jims bushing, wrist pin (set of 2). .002" oversize. Replaces OEM: 24316-99
SKU: A084-420489
MPN: 3998K
OEM: 24316-99
DPN: 518084

Variant: 25) 05-17 TCA/B 88/96". James .045" top-end gasket kit, 3-3/4" big bore.
SKU: A138-428543
MPN: 17052-05
OEM: 17052-99B
DPN: 526138

Variant: 25) 99-04 TCA/B 88/96". Cometic EST top-end gasket kit, 3-3/4" bore. Replaces OEM: 17052-99B
SKU: A053-463458
MPN: C9779
OEM: 17052-99A
DPN: 561053

Variant: 25) 99-04 TCA/B 95/103". Cometic EST top-end gasket kit, 3-7/8" big bore.
SKU: A054-463459
MPN: C9780
DPN: 561054

Variant: 25) 05-17 TCA/B 88/96". James .040" top-end gasket kit, 3-3/4" big bore.
SKU: A805-471210
MPN: 17052-05-MLS
DPN: 568805

Variant: 25) 99-04 TCA/B 88/96". James top-end gasket kit, 3-3/4" bore. Replaces OEM: 17052-99B
SKU: A902-809307
MPN: 17052-99
OEM: 17052-99A
DPN: 906902

Variant: 25) 99-04 TCA/B 95/103". James top-end gasket kit, 3-7/8" big bore.
SKU: A917-809322
MPN: 17052-99-X
DPN: 906917

Délais d'expédition et de livraison

Toutes les commandes sont expédiées depuis notre entrepôt situé à Falkenberg, en Suède. Nous mettons tout en œuvre pour les expédier rapidement !

Explication du statut des stocks :

En stock : prêt à être expédié dans les délais indiqués. Les colis arrivent généralement dans un délai de 2 à 4 jours ouvrables après leur expédition, selon votre localisation.
Épuisé : actuellement en rupture de stock chez Customhoj, mais nous espérons le recevoir à nouveau bientôt ! N'hésitez pas à nous contacter pour savoir quand le produit sera à nouveau disponible.

Si un produit existe en plusieurs variantes (tailles ou couleurs, par exemple), le statut du stock est automatiquement mis à jour lorsque vous sélectionnez votre option.

Notre objectif est simple : vous livrer votre commande le plus rapidement possible !

Retours sans tracas pendant 30 jours - sans poser de questions

Si vous n'êtes pas entièrement satisfait de votre commande, que vous ayez besoin de changer de taille ou autre, nous vous offrons une politique de retour de 30 jours à compter de la date de réception de votre commande. Les frais de retour sont à votre charge.

Veuillez noter que le droit de retour ne s'applique pas aux produits personnalisés ou fabriqués sur commande. Consultez notre politique de retour pour connaître tous les détails et conditions.