01-16 S300/S400 Oil Drain & Supply Kit

Complete your S300 or S400 T4 turbo conversion with the G&R Diesel Turbo Oil Drain & Supply Kit. This comprehensive package provides everything needed to properly plumb oil supply and drain for aftermarket turbos on 2001–2016 Duramax engines, delivering reliable lubrication, superior sealing, and a clean professional installation.

Premium Construction & Materials

The kit includes a -10 braided stainless steel oil drain line with billet aluminum adapters and a -6 braided stainless steel oil supply line with necessary fittings. The billet turbo drain adapter features a high-quality O-ring seal in place of the factory paper gasket for improved sealing and easier installation. All components are designed for durability in high-heat, high-vibration diesel environments.

Key Features & Benefits

• Complete Drain & Supply Solution: Includes both the oil drain and oil supply lines with all required adapters and fittings for a full T4 turbo oil plumbing package.
• -10 Braided Stainless Drain Line: High-quality braided stainless steel line with billet oil drain-to-rear engine cover adapter and turbo drain adapter.
• -6 Braided Stainless Oil Supply Line: Dedicated supply line with fittings that connect to the oil port on the side of the engine block.
• Protects Rear Cam Bushing: Routing oil supply from the side of the block eliminates the risk of starving the rear camshaft bushing of oil (a common issue when using the factory turbo oil feed location).
• Superior O-Ring Seal: Billet turbo drain adapter uses a high-quality O-ring instead of the inferior factory paper gasket for better sealing and simplified installation.
• Wide Compatibility: Works on any 2001–2016 Duramax engine when installing an S300 or S400 series T4 turbo.

Applications

• 2001–2016 Chevrolet Silverado / GMC Sierra 2500/3500 HD with Duramax engines
• S300 or S400 T4 turbo conversions
• Will not work on a stock application

Why Choose the G&R Diesel Complete Oil Drain & Supply Kit?

Proper oil supply and drainage are critical for turbo reliability and engine longevity. This kit addresses both needs in one package while solving a known Duramax oiling concern by relocating the turbo oil feed to the side of the block. With braided stainless lines, billet adapters, and an O-ring sealed drain flange, it delivers a cleaner, more durable, and more reliable solution than piecing together individual components. Designed and manufactured with the quality expected from G&R Diesel.

Kit Includes:

• -10 braided stainless oil drain line
• Billet oil drain-to-rear engine cover adapter
• Billet turbo drain adapter (O-ring sealed)
• -6 braided stainless oil supply line
• Fittings for side-of-block oil port connection

This complete kit is the ideal foundation for any serious 2001–2016 Duramax T$ S300/S400 turbo conversion and pairs perfectly with other G&R Diesel Duramax performance components.