bore size Hypereutectic pistons

humaxxxMember

Hello,

I have decided to bore my 351c to 0.040 (it's now 0.030) and put in some new Hypereutectic Keith black Pistons.
Now i have seen the following pistons KB-177-40.

What must be the exact bore of the engine? 4.0400000 or something like 4.0410-4.0415.
The reason i'am asking is that a friend of my had some Hyper pistons from Speedpro and they broke because there where to tight. After calling with Speedpro they say give the bore an extra of 0.0020....???

Greetings

Frank (Holland)

11/26/168:52 AM

Original Post

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