DJ Rock EV3165 Engine Exhaust Valve

Engine Exhaust Valve for GM Applications

DJ Rock EV3165 is a premium nitride-coated engine exhaust valve built for direct-fit replacement in a wide range of GM vehicles. With a 39.4 mm valve head diameter, 7.97 mm stem diameter, and 124.8 mm overall length, it is specified for exhaust-side valvetrain service where heat control and sealing accuracy matter.

Fits 1997-2017 Chevrolet Corvette, exhaust; Fits 1998-2002 Pontiac Firebird, exhaust; Fits 1999-2013 Chevrolet Silverado 1500, exhaust; Fits 2000-2014 Chevrolet Tahoe, exhaust; Fits 2003-2014 GMC Savana 1500, exhaust.

• Nitride-coated exhaust valve for improved wear resistance and reduced friction
• 39.4 mm valve head diameter for application-specific OE-style fitment
• 7.97 mm stem diameter and 124.8 mm overall length
• Premium-grade construction for high-temperature exhaust service
• Single lock groove design
• Direct replacement for select Chevrolet, GMC, Cadillac, Buick, Pontiac, Saab, Hummer, Isuzu, and GMC truck/SUV applications

Detailed Product Overview

The EV3165 exhaust valve is engineered for engines that need reliable control of burnt-gas flow from the combustion chamber into the exhaust system. Its heat-resistant alloy construction and black nitride surface treatment are used to improve durability under repeated thermal cycling, helping the valve maintain structural stability in demanding exhaust environments. This makes the DJ Rock EV3165 a practical choice for service work on vehicles such as the Chevrolet Express, GMC Savana, Silverado, Sierra, Tahoe, Yukon, and related GM platforms.

This part cross-references OE-style exhaust valve applications for the same vehicle families and is commonly searched as a replacement exhaust valve for Chevrolet Silverado 1500, GMC Sierra 1500, and Chevrolet Tahoe engine repair.

Common Repair Uses

• Burnt or damaged exhaust valve replacement
• Loss of compression caused by valve sealing issues
• Exhaust-side valvetrain noise or irregular engine operation
• Engine rebuilds requiring a direct-fit exhaust valve
• Heat-related valve wear in high-mileage GM engines

Installation Notes and Tips

Verify valve head diameter, stem diameter, overall length, and lock groove count before installation. Match the application notes in the fitment data, especially for engines identified with LY2 or LR4 notes. Professional cylinder head service, including inspection of guides, seals, and seats, is recommended during exhaust valve replacement.

Quality Assurance

DJ Rock positions this exhaust valve as a premium replacement component manufactured to meet or exceed OEM quality standards. The nitride-coated surface and heat-resistant alloy construction are selected to support long-term exhaust-valve durability in severe operating conditions.