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Mystery Piston Set - can anyone help?


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I was sold these pistons years ago as suitable for a Spitfire 1500. I didn't need them at the time but have since discovered they are not for a Spit 1500.

They are Sheepbridge Engineering Precision Pistons. The label reads Reference: SA193, Make: Standard, Size: 2.90 +020.

As you will see in the photo the word Triumph has been written on the box in ink.

Would appreciate any assistance in identifying which engine these are for.







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Thanks for all the replies so far.

As Rob says they are 2.90" diameter but don't look like any phots I've found on the net for a Spit 1300.

I can't seem to get the Sa193 number to come up in any searches.

Any thoughts on the hand written numbers on box lid? Looks like 15 - 9?


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