Oversize Intake Valve 16V (5 cyl 20V) 34mm, 5.5mm stem Undercut

Description

Techtonics/Supertech 16V (Audi 5 cyl 20v) oversized 34mm intake valve. 2mm larger than the standard valve. 20 cfm more flow than the standard valve. Black nitride treatment reduces friction, improves heat dissipation and Valve guide wear. Stem 5.5 undercut to 5.1mm. Use #109 225 valve guide, 109 137 Titanium retainer, 109 161 valve seat) 109121. Made by Supertech for Techtonics.