Z320 Posted June 15 Report Share Posted June 15 Hi, only the TR4A cylinder head has a number stamped on the front / right side. I always thought it is a serial number, but on both heads I one (1 spare) it is the same number... What is the issue with this numberm, please. Ciao, Marco Quote Link to post Share on other sites
Motorsport Mickey Posted June 15 Report Share Posted June 15 Hi Marco, The number stamped on the head horizontal plinth is the TR4a series number, ie if it has the 511695 number ( from memory) it is indicative that it’s a TR4a head. Hope that helps. Mick Richards Quote Link to post Share on other sites
Z320 Posted June 16 Author Report Share Posted June 16 Hi Mick, yes, this is the number, I always thought it is individual, but yesterday I noticed it is the same on both head, ie all 4A heads! Thank you for your answer Marco Quote Link to post Share on other sites
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