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The ultimate head-sealing solution for high-boost JZ builds. Designed for serious performance, this kit provides superior sealing under high cylinder pressures and fits standard 86mm bore sizes up to 87mm oversize.
Kit Includes:
1 × 0.047" Copper Head Gasket
6 × 0.050" Phosphor Copper Fire Rings (0.003" crush)
Machining Requirements: Requires block deck machining to fit fire ring grooves.
Groove Specs: 92.8 mm diameter × 1.0 mm wide × 0.8 mm deep