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Available in stock 8.5:1 flat-top or 10:1 high dome compression. The domes in the high compression models are offset to work in stock EV combustion chambers without modification. Fits all 1984-1999 EV Big Twin engines.

Not legal for sale or use in California on any pollution controlled motor vehicle.
Not legal for sale or use on any EPA pollution controlled motor vehicle.

Weight	1 lbs
Brand	Wiseco®
Related Parts	#521-641, #521-642, #521-643, #521-644, #521-666, #521-667, #521-668, #554-110, #554-120, #554-130, #554-140
Country of Origin	US
Engine Type	Evolution®, Big Twin®

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Wiseco 80” Evolution® Big Twin Pistons

8:5:1 (-1.5CC) Flat-Top 80* Optional

10:1 (+12.9CC) Dome-Top 80* Optional

Circlips* Optional

Replacement Rings* Optional

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