TruckTok 1985-1988 305 TPI & 1987-1988 350 TPI Engines EGR Block Off Delete Plug Kit

FITMENT

• 1985–1988 Chevrolet Corvette C4 (5.7L 350 TPI).
  
• 1985–1988 Chevrolet Camaro IROC-Z / Z28 (5.0L 305 TPI & 5.7L 350 TPI).
  
• 1985–1988 Pontiac Firebird Trans Am / GTA (5.0L 305 TPI & 5.7L 350 TPI).

DESCRIPTION

Product Overview

• Tuned Port Injection (TPI) engines found in classic 1980s Corvettes, Camaros, Firebirds, and Trans Ams use an intake manifold-mounted EGR system. Over decades of heat cycles and carbon buildup, factory EGR valves can wear out, stick open, or develop vacuum leaks that affect drivability.
  
• The 305/350 TPI EGR Block-Off Plate Kit provides a simple solution for sealing unused EGR ports after removal. this kit caps the factory manifold EGR opening to help prevent vacuum leaks, reduce future exhaust contamination, and create a cleaner classic TPI engine bay.

Key Features

• Precision CNC Billet Aluminum: Machined from high-strength billet aluminum with a durable flange design to withstand engine bay heat and vibration.
  
• Helps Prevent Vacuum Leaks & Idle Issues: Seals failing or unused TPI EGR ports to help reduce air leaks, rough idle, and engine surging.
  
• Reduces Exhaust Contamination: Blocks hot exhaust gases from entering the TPI intake manifold, helping maintain cleaner intake airflow.
  
• Clean Engine Bay Design: Simplifies the TPI engine compartment by removing unused EGR components and related hardware.

FAQ

Q: Where does this kit install?

A: It installs directly on the intake manifold EGR mounting location where the factory EGR valve is removed, sealing the unused passage.

Q: What symptoms can a failing TPI EGR valve cause?

A: A worn or stuck-open EGR valve can cause rough idle, hesitation, surging, poor throttle response, and vacuum leaks. This block-off plate helps seal the unused EGR port after removal.

Q: Can I install this plate without removing the intake manifold?

A: In most applications, the plate installs directly at the factory EGR mounting location without removing the intake manifold. Access may vary depending on vehicle setup.