Exhaust star nut

€39.95

Ready to ship today, Delivery time appr. 2-4 workdays within Germany

part no.: 1821721

This is a high quality replacement star nut for the exhaust headers. Price per piece. TIP... more

Exhaust star nut

This is a high quality replacement star nut for the exhaust headers.
Price per piece.

TIP
Please order the suitable clamping and pressure rings at the same time.

Clamping ring 38mm art.no. 1821586
Thrust ring 38mm art.no. 1821585

Clamping ring 40mm art.no. 1821449
Pressure ring 40mm art.no. 1821448.

Spare part for the classic BMW airhaed models
R 60/7 , R 75/7, R 80/7, R 80RT, R 80, R 100/7, R 100S, R 100, R 100RS, R 100RT, R 100CS,
R 80G/S, R 80ST,
Paralever models R 80GS, R 100GS, R 80GS PD, R 100GS PD, R 80R, R 100R, R 100R Mystic, R 80GS Basic
Monolever models R 80, R 80RT, R 100RS, R 100RT

Compare 18211234721 / 18-21-1-234-721

Information on product safety

Fits for BMW R2V:

R 60/7

1976-1980

R 75/7

1976-1977

R 80

1977-9.1980

R 80

9.1980-1984

R 100

1976-9.1980

R 100

9.1980-1984

R 80 Mono

1984-1995

R 100 Mono

1986-1995

R 80G/S

1980-1987

R 80ST

1982-1984

R 80GS

1987-1995

R 80GS Basic

1996

R 100GS

1987-1996

R 80R

1991-1995

R 100R

1991-1995

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Pressure ring
Exhaust 38mm

BMW 2-vakve Boxer models

€9.90

Prices incl. VAT, plus shipping costs

Part no. 1821585

Clamping ring
38mm

BMW 2-valve Boxer models

€11.95

Prices incl. VAT, plus shipping costs

Part no. 1821586

Valve cover gasket

BMW 2-valve Boxer models

€3.95

Prices incl. VAT, plus shipping costs

Part no. 1112426

Valve cover Classic

BMW 2-valve Boxer models

€49.80

Prices incl. VAT, plus shipping costs

Part no. 1112240

Idle switch
For 5-speed gearbox

BMW 2v Boxer models from 9/75 on

€19.95

Prices incl. VAT, plus shipping costs

Part no. 6131097

Cylinder gasket Set
From 9/1980 on

For Power Kit 1000cc, Replacement Kit
1000cc, BMW R 100 models from 9/80 on

€50.95

Prices incl. VAT, plus shipping costs

Part no. 1100101

Fuel tap
Left side

BMW 2-valve Boxer models

€49.50

Prices incl. VAT, plus shipping costs

Part no. 1612113

Oil pan gasket

BMW 2-valve Boxer models

€6.95

Prices incl. VAT, plus shipping costs

Part no. 1113427

Cap nut stainless steel

BMW 2-valve Boxer models
For valve cover

€6.90

Prices incl. VAT, plus shipping costs

Part no. 1112330

Pushrod tube seal
18mm

BMW 2v Boxer models from 9/75 on

€3.95

Prices incl. VAT, plus shipping costs

Part no. 1132995

Steering head bearing

BMW 2V Boxer, K 2V, K 4V, F models

€21.90

Prices incl. VAT, plus shipping costs

Part no. 0711070

Fuel tap
Right side

BMW 2-valve Boxer models

€49.50

Prices incl. VAT, plus shipping costs

Part no. 1612114

Oilfilter Set
Mahle

BMW 2v Boxer models without oilcooler
OX37D two-piece

€14.95

Prices incl. VAT, plus shipping costs

Part no. 1142145

Exhaust Thread Cutting Tool

BMW 2-valve Boxer models
M52x2

€99.80

Prices incl. VAT, plus shipping costs

Part no. 1899270

Valve guide

BMW 2V Boxer models
Not for R 45 and R 65

€14.85

Prices incl. VAT, plus shipping costs

Part no. 1112708

Bearing shell conrod

BMW 2v Boxer models
Standard sized

€13.20

Prices incl. VAT, plus shipping costs

Part no. 1124460

Valve Cover Retro

BMW 2v Boxer models
Black Semi-matt

€89.90

Prices incl. VAT, plus shipping costs

Part no. 1112246

Piston ring Set

BMW R 80 models
800cc Nikasil plated

€37.95

Prices incl. VAT, plus shipping costs

Part no. 1125398

Airfilter
Mahle

BMW 2-valve Boxer models from 9/80 on
LX56

€25.25

Prices incl. VAT, plus shipping costs

Part no. 1372080

Clutch disc

BMW 2v Boxer models from 9/80 on

€89.50

Prices incl. VAT, plus shipping costs

Part no. 2121512L

Exhaust nut

BMW R 45 and R 65 models

€28.65

Prices incl. VAT, plus shipping costs

Part no. 1821595

Diode board

BMW 2v Boxer models

€79.90

Prices incl. VAT, plus shipping costs

Part no. 1231062

Cylinder head gasket

BMW 2-valve Boxer 1000cc and
Power Kit 860cc, Power Kit 1000cc

€12.90

Prices incl. VAT, plus shipping costs

Part no. 1112715

Strainer Fuel tap
Karcoma

BMW 2-valve Boxer models

€9.50

Prices incl. VAT, plus shipping costs

Part no. 1612112

Exhaust nut

BMW /5, /6 models
With long fins

€38.95

Prices incl. VAT, plus shipping costs

Part no. 1811270

Star Nut Wrench

BMW 2-valve Boxer models
In shop quality

€49.95

Prices incl. VAT, plus shipping costs

Part no. 1821699

Chain tensioner Set
Simplex

BMW 2V Boxer models

€97.00

Prices incl. VAT, plus shipping costs

Part no. 1131183

Clamping ring
Exhaust 40mm

BMW R 100S, R 100RS, R 100RT

€13.95

Prices incl. VAT, plus shipping costs

Part no. 1821449

Shaft seal
Transmission Input 5 speed

BMW 2-valve Boxer models

€9.95

Prices incl. VAT, plus shipping costs

Part no. 2312726

Sealing rings for inspection

BMW 2V Boxer models

€5.90

Prices incl. VAT, plus shipping costs

Part no. 0711333

Rubber mounts
Diode plate

BMW 2-valve Boxer models

€3.95

Prices incl. VAT, plus shipping costs

Part no. 1231131

Carb gasket Set

BING carburator

64/26, 64/28, 64/32, 94/40
BMW 2-valve Boxer models
Without diaphragm

€19.95

Prices incl. VAT, plus shipping costs

Part no. 1311951

Crankshaft seal

BMW 2-valve models
Rear

€21.95

Prices incl. VAT, plus shipping costs

Part no. 1111739

Crankshaft seal

BMW 2v Boxer models
Front

€6.80

Prices incl. VAT, plus shipping costs

Part no. 1114011

Pressure ring

BMW R 100S, R 100RS, R 100RT up to 9/80
For exhaust 40mm

€9.90

Prices incl. VAT, plus shipping costs

Part no. 1821448

Clutch boot
Clutch pressure bearing

For BMW 2V, 4V, K models

€19.50

Prices incl. VAT, plus shipping costs

Part no. 2313731

Airfilter
Mahle

BMW 2-valve Boxer models up to 9/80
LX194

€13.25

Prices incl. VAT, plus shipping costs

Part no. 1372382

Pushrod tube
18mm

BMW 2v Boxer models from 9/75 on
Stainless steel

€24.90

Prices incl. VAT, plus shipping costs

Part no. 1111904

Float
BING carburator 64/26, 64/28, 64/32, 94/40

BMW 2-valve Boxer models

€26.95

Prices incl. VAT, plus shipping costs

Part no. 1311766

Oilfilter Set
Mahle

BMW 2v Boxer models with oilcooler
OX36D two-piece

€15.90

Prices incl. VAT, plus shipping costs

Part no. 1142146

Exhaust Thread Cutting Tool

BMW 2-valve Boxer models
M52x2

€99.80

Prices incl. VAT, plus shipping costs

Part no. 1899270

Sport tappet, Cam follower

BMW 2-valve Boxer models
Wank

€129.90

Prices incl. VAT, plus shipping costs

Part no. 1133638

Big Bore Kit 1070cc

BMW R 100 models from 9/80 on
Conrods 151,0 mm

€2,595.00

Prices incl. VAT, plus shipping costs

Part no. 1101100

Valve Cover Retro

BMW 2v Boxer models
Black Semi-matt

€89.90

Prices incl. VAT, plus shipping costs

Part no. 1112246

Star Nut Wrench
Touring

BMW 2-valve Boxer models
Short For the journey

€42.90

Prices incl. VAT, plus shipping costs

Part no. 1821698

Alternator rotor
New part

BMW 2-valve Boxer models

€129.00

Prices incl. VAT, plus shipping costs

Part no. 1231641

Silencer
Chrome

BMW R 80ST, R 80G/S PD

€796.00

Prices incl. VAT, plus shipping costs

Part no. 1812965

Ball bearing

BMW 2V Boxer models
For crankshaft front

€16.35

Prices incl. VAT, plus shipping costs

Part no. 0711722

Clutch disc

BMW 2v Boxer models from 9/80 on

€89.50

Prices incl. VAT, plus shipping costs

Part no. 2121512L

Swing Arm Boot

BMW 2-valve Boxer models

€21.95

Prices incl. VAT, plus shipping costs

Part no. 3317304

Sealing rings for inspection

BMW 2V Boxer models

€5.90

Prices incl. VAT, plus shipping costs

Part no. 0711333

Gasket

BMW Paralever models
For front collector

€19.95

Prices incl. VAT, plus shipping costs

Part no. 1821956

Camshaft asymmetric

BMW R 45, R 65 models

€329.00

Prices incl. VAT, plus shipping costs

Part no. 1131180

Clamp
48mm

BMW R 65GS, R 80G/S, R 80ST

€24.95

Prices incl. VAT, plus shipping costs

Part no. 1821577

Asymmetrical camshaft

BMW 2v Boxer models from 9/78 on

€339.00

Prices incl. VAT, plus shipping costs

Part no. 1131800

Fork tube

BMW R 80GS, R 100GS Modelle

€239.00

Prices incl. VAT, plus shipping costs

Part no. 3142853

Gearbox gasket Set
5-speed without kickstarter

BMW 2V Boxer Modelle ab 9/80

€49.90

Prices incl. VAT, plus shipping costs

Part no. 2300593

Silencer Hoske Set
Chrome

BMW /5, /6, /7 models
38mm

€398.00

Prices incl. VAT, plus shipping costs

Part no. 1812908

Valve cover Classic

BMW 2-valve Boxer models

€49.80

Prices incl. VAT, plus shipping costs

Part no. 1112240

Pressure ring
Exhaust 38mm

BMW 2-vakve Boxer models

€9.90

Prices incl. VAT, plus shipping costs

Part no. 1821585

Clamping ring
Exhaust 40mm

BMW R 100S, R 100RS, R 100RT

€13.95

Prices incl. VAT, plus shipping costs

Part no. 1821449

Strainer Fuel tap
Karcoma

BMW 2-valve Boxer models

€9.50

Prices incl. VAT, plus shipping costs

Part no. 1612112

Fuel tap
Straight Karcoma

BMW 2-valve Boxer models

€57.90

Prices incl. VAT, plus shipping costs

Part no. 1612557

Manifold
38mm Chrome

BMW /5, /6, /7 models up to 9/80
Left side

€189.00

Prices incl. VAT, plus shipping costs

Part no. 1811434

Oil funnel

BMW 2v Boxer

€8.90

Prices incl. VAT, plus shipping costs

Part no. 8121099.G

Complete exhaust system
Black chrome

BMW R 80G/S

€1,690.00

Prices incl. VAT, plus shipping costs

Part no. 1812010

Valve Cover Bundle
40 Years of Siebenrock

Anniversary Offer
BMW 2v Boxer models

€111.00

Prices incl. VAT, plus shipping costs

Part no. 1112261S40

Big Bore Kit 1070cc Touring

BMW R 100 models from 9/80 on
Conrods 150,5mm

€2,695.00

Prices incl. VAT, plus shipping costs

Part no. 1101110

NEW

Siebenrock FM Oil pan

BMW 2-valve Boxer models
Basic

€685.00

Prices incl. VAT, plus shipping costs

Part no. 1113080

NEW

Single seat RS

BMW R 100RS
Other 2V Boxer models

€799.00

Prices incl. VAT, plus shipping costs

Part no. 5255835

NEW

Big Bore Kit 1070cc "S" Touring

Conrods 150,5mm

€2,695.00

Prices incl. VAT, plus shipping costs

Part no. 1101210

NEW

Big Bore Kit 1070cc "S"

Conrods 151,0 mm

€2,595.00

Prices incl. VAT, plus shipping costs

Part no. 1101200

NEW

Manifold
Chrome

BMW R 80, R 100 Monolever models
Right side Without oil cooler

€186.00

Prices incl. VAT, plus shipping costs

Part no. 1814182

NEW

Valve cover Siebenrock
Four ribs

BMW 2V Boxer models
With polished edges

€72.00

Prices incl. VAT, plus shipping costs

Part no. 1112345

Cylinder head Krauser
Left side

Krauser 4-valve / MKM

€0.00

Prices incl. VAT, plus shipping costs

Part no. 11661002

NEW

Brakemaster cylinder
Repair kit

BMW R 100 models
Rear

€44.95

Prices incl. VAT, plus shipping costs

Part no. 3421233

Cylinder protection
Right side Black coated

BMW /7, R 65GS, R 80G/S,
Monolever, Paralever models

€137.00

Prices incl. VAT, plus shipping costs

Part no. 4671882

Oil Cooler Kit "Street"

BMW R 45, R 65, /7, Monolever models
Centered position

€495.00

Prices incl. VAT, plus shipping costs

Part no. 1142400S

Clamping ring

BMW R 45 and R 65 models
For exhaust

€12.95

Prices incl. VAT, plus shipping costs

Part no. 1821598

Fuel filler cap
Lockable

BMW 2-valve Boxer models

€169.00

Prices incl. VAT, plus shipping costs

Part no. 5125125

Engine Parts

Drive train

Electric

Chassis

Exhaust

Luggage

Krauser 4V MKM

Miscellaneous

BMW new parts

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Exhaust star nut

BMW /7, Monoelver, Paralever models
With short fins