Best LS Oil Bypass Delete Solutions for Gen III & IV Engines
Engineers and car enthusiasts frequently seek reliable oil bypass delete options for GM LS engines to improve oil pressure consistency after AFM, DOD, or VVT conversions. This guide reviews top-rated bypass delete kits and related valve plugs designed for 2007+ Gen III and Gen IV LS engines, highlighting direct-fit installation, durability, and compatibility with common LS models. Explore practical choices that help prevent oil pressure drops and reduce clogging issues without extensive modifications.
| Product | Brand | Key Benefit | LS Engine Compatibility |
|---|---|---|---|
| Michigan Motorsports LS Oil Pan Oil Pressure Relief Valve Plug – Bypass Conversion Kit | Michigan Motorsports | Secondary relief valve bypass to reduce clogging and pressure loss | Gen IV LS engines (2007-2013) |
| OywhC LS Billet Rear Galley Plug Barbell Oil Diverter | OywhC | Direct replacement for aging OEM barbell plug | Gen III & IV LS engines |
| JGR LS Billet Oil Bypass Delete Valve (Silver) | JGR | Billet aluminum bypass delete for multiple Gen 3/4 LS engines | Gen III & IV LS engines |
| Michigan Motorsports LS Oil Pan Oil Pressure Relief Valve Plug – Bypass (2007+ Gen IV) | Michigan Motorsports | Direct replacement to maintain oil pressure after AFM/DOD/VVT mods | Gen IV LS engines (2007+) |
| Kamrexi Oil Pressure Relief Valve Bypass Plug Kit for LS Gen IV | Kamrexi | Exact fit with upgraded crush washer for high-pressure seal | 2007-2013 LS Gen IV |
Note: This article presents objective product overviews and does not include prices. All links lead to official Amazon listings for purchase consideration.
align=”left”>Michigan Motorsports LS Oil Pan Oil Pressure Relief Valve Plug – Bypass Conversion Kit
The bypass conversion replaces the factory rear-mounted oil pressure relief valve in Gen IV LS oil pans, addressing clogging and pressure loss after AFM, DOD, or VVT conversions. It is designed for a direct fit with M12 x 1.75 thread and a 15mm hex head, enabling leak-free installation with no modifications. The plug uses durable steel construction and includes a crush washer for a tight seal under pressure.
align=”left”>OywhC LS Billet Rear Galley Plug Barbell Oil Diverter
These billet rear oil passage plugs are machined from aluminum alloy T6061 and serve as a direct replacement for aging plastic OEM barbell plugs on Gen III and Gen IV GM LS engines. They fit a wide range of LS models (including LS1, LS3, LS2, LQ4, LQ9, and more) and provide precise dimensions for a reliable seal and improved oil flow path with a durable, corrosion-resistant finish.
align=”left”>JGR LS Billet Oil Bypass Delete Valve (Silver)
JGR’s billet aluminum bypass delete valve is engineered to fit Gen 3 and Gen 4 LS engines, including popular configurations like 4.8L, 5.3L, 5.7L, 6.0L, 6.2L, and 7.0L variants. This component is designed to bypass the secondary valve, supporting consistent oil pressure after modifications such as AFM/DOD or VVT eliminations. Its robust construction aims to withstand heat and engine vibration.
align=”left”>Michigan Motorsports LS Oil Pan Oil Pressure Relief Valve Plug – Bypass (Gen IV)
This direct replacement is tailored for Gen IV LS engines (2007–2013) and targets the secondary relief valve to prevent pressure drops in modified setups. It is particularly suited for engines with DOD/AFM or VVT deletions where the secondary relief valve may become unnecessary or problematic. The kit emphasizes compatibility and stable oil pressure under load.
align=”left”>Kamrexi Oil Pressure Relief Valve Bypass Plug Kit for LS Gen IV
The Kamrexi kit is engineered for 2007–2013 Gen IV LS engines, featuring an exact fit with M12×1.75 threads and a 15mm hex head for straightforward, no-modification installation. It helps eliminate oil pressure issues by bypassing the original secondary valve when AFM/DOD/VVT modifications are present, with a heavy-duty steel construction and a new crush washer for reliable sealing.
align=”left”>Saillong LS Billet Oil Cooler Block Off Plate
The Saillong billet oil cooler block off plate is designed to seal the oil pan and prevent leakage during LS engine installation. Compatible with Gen III and Gen IV LS engines, it offers a larger ported internal cavity for improved flow and reduced risk of leaks, while remaining lighter than traditional plates due to its aluminum alloy construction.
align=”left”>JGR LS Billet Oil Bypass Delete Valve (Red)
The red variant from JGR provides the same Gen III/IV compatibility and billet aluminum construction, optimized for bypassing the LS engine’s oil pressure relief pathway. It is designed for durability and reliable performance across common LS engine configurations including LS1, LS2, LS3, L92, LQ4, and LQ9.
align=”left”>Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover
This bypass cover is intended for Gen III and IV LS engines without an oil cooler setup, providing a clean cover for factory oil cooler ports and enhanced flow. It features a larger ported cavity than OE die-cast versions and is compatible with oil pans that have oil cooler ports above the oil filter, contributing to improved oil routing in certain LS configurations.
Buying Guide: Key Considerations For LS Oil Bypass Upgrades
- Engine generation and model compatibility: Verify Gen III vs Gen IV compatibility and engine displacement to ensure a proper fit for LS engines (4.8L to 7.0L variants).
- Direct-fit design: Favor products advertised as direct replacements with standard thread sizes (e.g., M12 x 1.75) and hex head dimensions for easy installation and leak-proof sealing.
- Material durability: Steel and billet aluminum parts offer improved heat resistance and vibration durability compared to plastic OEM components.
- Sealing hardware: Look for a reliable crush washer and upgraded seals to minimize oil leaks under high pressure.
- Post-modification suitability: Consider bypass solutions specifically intended for AFM/DOD or VVT deletions, to prevent secondary valve-related pressure issues after modifications.
- Installation impact: Choose parts that require minimal or no engine modification to reduce installation time and risk.
- Brand reputation and warranty: Favor well-known brands with documented fitment and return policies to ensure support if compatibility questions arise.
- Documentation and installation guidance: Check for clear product documentation, installation tips, and compatibility notes to aid correct assembly.
- Price-to-value: Weigh the potential for improved oil pressure stability against the cost of parts and the labor involved in installation.