Oversize Intake Valve 16V (5 cyl 20v) 32.5mm, 7mm stem Undecut

Description

Techtonics 16V (Audi 5 cyl 20v)oversized intake valve. 0.5mm larger than standard valve. 12 cfm gains in low valve lifts and 6 cfm with high valve lifts. Black nitride treatment reduces friction, improves heat dissipation and Valve guide wear. Stem undercut to 5.75mm. (Will work in “ABF” cylinder heads (single groove retainers and keepers will be needed)