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Head identification
Posted: Mon May 08, 2023 12:30 am
by twc641
I was told my engine has a stage 4 unleaded head ?
MOWOG number is a 998
What are the other numbers stamped on it?
Re: Head identification
Posted: Mon May 08, 2023 1:12 am
by timmy201
-2A964 is a standard rocker arm
-The STG 24708 could mean anything, it was added post factory. It could be the job number of the shop that modified it, maybe the combustion chamber cc or the amount skimmed from the face
-12G295 is a small bore head fitted to MG1100, 998 Cooper etc
Re: Head identification
Posted: Mon May 08, 2023 2:16 am
by twc641
so this could be a stage 4 unleaded?
Re: Head identification
Posted: Mon May 08, 2023 2:23 am
by twc641
looking a bit more closely after stg roman numeral lV ?
Re: Head identification
Posted: Mon May 08, 2023 3:25 am
by timmy201
The “stage number” will vary depending on who did the work, so being stage 3 or 4 isn’t a guarantee on what’s been done to it
Re: Head identification
Posted: Mon May 08, 2023 5:18 am
by winabbey
Is that a crack in the rocker arm?
Re: Head identification
Posted: Mon May 08, 2023 11:57 am
by twc641
I hope it's not a crack i will have a closer look.
Re: Head identification
Posted: Mon May 08, 2023 12:08 pm
by twc641
Thanh you Timmy
Re: Head identification
Posted: Tue May 09, 2023 9:45 am
by Alex
STG III
I'd guess an old Stage 3 spec from someone.