Features:

• Simulates the bore distortion of a torqued cylinder head during the honing, boring, and ring gapping process
• Proven to reduce blowby, reduce oil consumption, and increase reliability
• Essential for high performance engine builds
• Top bore edge radius makes it comfortable for ring gapping
• Included spacers duplicate cylinder head deck height to accurately reproduce block stresses
• Use with aftermarket head studs or OEM head bolts
• CNC machined from tempered and anodized aerospace grade aluminum

Works with:

• All Subaru EJ20 engines