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jmantle · 08-02-2020, 04:04 PM

[QUOTE=SSDiv6;619698]Although some non-compliant pistons are out there, in a nutshell, Yes, they should mirror the OEM piston according to the rule book.

Compression distance must be identical to OEM.

This is one I've always questioned, approved piston section lists "minimum compression distance" which in my case was considerably less than a stock piston.

Jim Mantle V/SA 6632

08-02-2020, 04:04 PM	#6
jmantle Member Join Date: Feb 2008 Location: Black Creek, BC Canada Posts: 331 Likes: 80 Liked 172 Times in 81 Posts	Re: NHRA Stock Replacement Piston Question [QUOTE=SSDiv6;619698]Although some non-compliant pistons are out there, in a nutshell, Yes, they should mirror the OEM piston according to the rule book. Compression distance must be identical to OEM. This is one I've always questioned, approved piston section lists "minimum compression distance" which in my case was considerably less than a stock piston. Jim Mantle V/SA 6632