| Listed in parts books | Not catalogued by year yet |
PISTON SET STANDARD (63mm) 5T 1939-57 - 7-1 COMPRESSION - Use CP161 for 9:1
Standard 63mm piston set for the Triumph 5T, 7:1 compression, 1939-57.
CP29/STD is a standard-bore piston set, 63mm, for the Triumph 5T. The catalog entry covers the 1939-57 span and specifies a 7:1 compression ratio. The CP prefix is the usual Hepolite/Wellworthy-style piston coding rather than anything to do with Amal, so don't let the manufacturer tag throw you off - this is a piston, not a carburetor part.
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If you're after a higher-compression setup, the catalog notes CP161 as the piston to use for 9:1 instead of this one - so make sure you know which compression ratio your 5T is actually running before you order.
We don't have a lot of extra detail on file for this one beyond what's in the description. Give us a call if you want to confirm bore size and fitment against your specific engine before pulling the trigger.
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