| Also known as | 70-70551, JRC 70-70551 |
| Listed in parts books | Not catalogued by year yet |
IN VALVE OS TRI 63-83 6MM
An oversize (6mm) inlet valve for Triumph engines, spanning 1963-1983 production.
This is an inlet valve listed as an oversize option for Triumph engines, covering a wide production span from 1963 to 1983 in our catalog records. The '6MM' in the description points to an oversize step on the valve stem or seat, which is the kind of thing a machinist reaches for when a head has been reground or the guides have worn and need correcting during a rebuild.
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Oversize valves like this one are used when standard-size parts won't seat properly anymore, so this isn't a straight swap for a stock valve without checking your guides and seats first. Because our records don't give us more detail beyond the basic listing, give us a call with your head measurements before you order so we can confirm it's the right oversize for your rebuild.
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