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For aluminum heads only. Recommended for 1986-1991 Corvette with aluminum cylinder heads. Can be used on 400 Race Engines of up to 4.155" maximum bore with minimal chamfer. Note: Does NOT have steam holes for street use 400 engine. Do NOT use on aluminum blocks with liners.

• Pre-flattened Copper Wire - Steel Core Laminate
• Aluminum Head Brinneling - None
• Gasket Bore - 4.166"
• Nominal Compressed Thickness - .039"
• Compressed Volume - 8.9cc