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Guest Anonymous

can someone please tell me the difference between the e12

and the e21 heads, does either one work with the mech. fuel

pump? I have a 72 with the 121ti head that needs work and

Ive read that the later heads breathe better, so please help

me get the right one , thankyou

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Guest Anonymous

most E21's weren't drilled, but some are. You can have it drilled- but it's usually easier to just get the right one to start with.

If you have 121 flattop pistons, you can use any M10 head. You'll have a slightly lower compression ratio, but it'll work just fine. However, if the tops of your pistons have raised bathtubs, you should get a 121 head, since the bathtubs will mess with the flow of other heads, and may actually hit the dome of an e12.

for starters...

t

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