M20B27"i" Stroker | Important Piston Info!

If you have an m20 powerplant in your old beem, you've probably heard of the stroker conversion! What you'd be unlikely to have heard, is that there are two different kinds of pistons that come in the 2.5i block. Only one type will work, the other would be a sad day...
When we mention, if you're building this engine use early stuff, we mean in terms of cooling system, early car - two neck water pump, late - single neck.
The production dates discussed in this video are pertinent only to the U.S Market. Refer to Realoem.com for further info on your market
Piston Part Numbers
Long skirt Original 325i : 11251714807
Weight improved piston from 325i produced post 7/20/1990: 11251735755
325e Piston: 11251714801
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