Now this is more like it ... DATSUN. datnissparts.com has them in stock $16/set

Fluted style ABS plastic with an internal O-ring
999MB-DATSUN 'DATSUN'
999MB-AX000 'nismo'
999MB-SX000 'NISSAN'
999MB-ZX000 'Z'

And those are just the genuine Nissan ones. There are many more styles by other companies

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エアバルブキャップ
99927-VLCBK Black
99927-VLCBL Blue
99927-VLCGD Gold
99927-VLCRD Red

Gold would look good on a white car

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http://google.com/search?q=99927-VLCBL $20/set A6063-T5 Aluminum, 17mm long

Maybe because they are so small

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I am endlessly fascinated by these (athough at the car shows nobody seemed interested in them). They always brought a smile to me

Nissan part number 999MB-AX000 $10/set of four

NISMO (Nissan Motorsport)

Round cap, Hex cap, silver/blue/black so many choices

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  999MB-AX000.jpg (36.94 KB)