Enginetech 73003-8 8 Pack Intake Valve for 1962-2002 GM Chevrolet 4.9L/5.3L/5.7L - Precision Engine Intake Valve Replacement

Enginetech part number 73003-8 is a direct-replacement intake valve supplied as a 8-pack for 1962-2002 GM/Chevrolet 4.9L, 5.3L, 5.7L applications. Key specifications: 2.020" head, 0.3410" stem, 4.909" overall length, chrome stem.

Important Notes

• Sold as an 8-pack. Eight valves per box cover the intake side of one V8 (16-valve) cylinder head - order accordingly for your application.
• EV8 stainless construction. The premium stainless alloy is chosen for its strength and heat tolerance under sustained high-RPM, forced-induction, or high-compression operation.
• Undercut stem profile. Material removed below the head reduces reciprocating mass and improves chamber flow, supporting higher RPM and more aggressive valve-event timing.
• Swirl-polished surface finish. The polished face and stem reduce surface friction and resist deposit formation in performance and forced-induction applications.
• Chrome-plated stem provides a hard, low-friction wear surface for extended service life.
• Always verify head diameter, stem diameter, and overall valve length against the OE valve being replaced before installation. Valve dimensions vary across engine families - a visual match is not enough.

Specifications

Vehicle Fitment

• 1967-1969 GM 4.9L / 302 OHV V8 16V Chev. Small Block
• 1962-1969 GM 5.3L / 327 OHV V8 16V Chev. Small Block
• 1967-2002 GM 5.7L / 350 OHV V8 16V Chev. Gen I Small Block
• 1967-2002 GM 6.3L / 383 OHV V8 16V Chev. Small Block Stroker
• 1969-1999 GM, CHEVROLET 5.7L / 350 OHV V8 16V Chev.

Product Video

Watch the Enginetech intake valve overview: https://youtu.be/zlKF_DnORuc

Watch the Enginetech intake valve overview: https://youtu.be/J3uhOP5kp9I

Watch the Enginetech intake valve overview: https://youtu.be/eLaQHop7rH8

Enginetech EV8 Pro performance valves are engineered for high-performance street and competition use rather than stock OE replacement. The line is built from EV8 stainless alloy with undercut stems and swirl-polished surfaces to reduce reciprocating mass, improve flow into and out of the chamber, and resist the operating temperatures of high-RPM, forced-induction, and high-compression service. Every valve is inspected by on-site engineers against a documented quality plan before leaving the plant. Verify head diameter, stem diameter, valve length, groove count, and tip-to-groove dimension against the valve being replaced before installation - performance valve geometry is rarely a drop-in match for the OE part it supersedes.

WARNING: This product can expose you to chemicals including lead and nickel, which are known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.