LT4 Supercharger Valley Plug – Reduce Oil Blow-By and Improve Intercooler Efficiency

Keep your LT4 running cleaner and cooler with the Dedicated Motorsports LT4 Valley Plug. This precision CNC-machined billet plug is designed to block the oil passage between the valley cover plate and the supercharger inlet—a known path for oil to be sucked into the blower and deposited onto the intercooler bricks.

Why It Matters:

Oil build-up on the intercoolers drastically reduces their efficiency, leading to higher intake temps and reduced performance. This simple but highly effective solution eliminates that issue at the source.

Features:

• CNC Machined from Billet Aluminum – Built for durability and perfect fitment.
• Direct Fit Plug – Blocks the oil path to reduce oil contamination in the intake.
• Improves Intercooler Performance – Helps maintain cooler IATs and more consistent power.
• Simple Install – Designed for a hassle-free upgrade with no permanent modifications.

Perfect for CTS-V, ZL1, and Z06 LT4 engines, especially in high-performance or E85 builds. Prevent heat soak and protect your performance with the DMS LT4 Valley Plug.