Best LS Oil Bypass Delete Kit for Gen III and Gen IV Engines
Answering the common need to bypass the factory oil pressure relief valve after AFM, DOD, or VVT conversions, these LS oil bypass delete kits are designed to stabilize oil pressure and prevent clogging. The top picks in this guide are suited for DIYers and professional installers aiming for a leak-free, install-without-modification solution. The highlighted products target Gen III and Gen IV engines, including popular LS3, L99, L96, L92, and LMG configurations. The buyer profiles vary from performance enthusiasts to maintenance-focused owners seeking reliability after engine modifications.
| Product | Best For | Why It Stands Out | Limitations |
|---|---|---|---|
| Michigan Motorsports LS Oil Pan Oil Pressure Relief Valve Plug | Performance builds with Gen IV LS engines | Direct-fit, OEM specifications, durable steel with crush washer | Limited to Gen IV pan compatibility in listing |
| Wllead LS Oil Pan Oil Pressure Relief Valve Plug | Broad LS engine range coverage | Wide compatibility across 4.8L–6.2L variants and common LS bases | Listing emphasizes compatibility; verify exact model match |
| Yubunt LS Oil Pan Oil Pressure Relief Valve Plug | Reliable replacement with multiple gaskets | Includes gaskets; designed for long-lasting reliability | Check model fit for some LS configurations |
| All Gen IV LS engines requiring robust seal | Exact fit, heavy-duty steel with upgraded washer | May require verifying engine variant compatibility | |
| Podavelle LS Oil Cooler Bypass Block-Off Plate | LS oil cooler plumbing bypass needs | Heavy-duty aluminum, anodized, improves oil flow | Not a direct valve plug; serves a different bypass purpose |
Michigan Motorsports LS Oil Pan Oil Pressure Relief Valve Plug
The Michigan Motorsports bypass conversion replaces the rear-mounted relief valve in Gen IV LS oil pans. It is best for builders completing AFM, DOD, or VVT work who want to reduce pressure loss that can occur after modifications. The kit uses M12 x 1.75 threading and a 15mm hex head, enabling a quick, leak-free install with no extra fabrication. Constructed from high-strength steel, it resists heat and vibration, with a crush washer included for a tight seal. Suitable for those prioritizing a factory-like fit and robust durability.
Best for: Performance enthusiasts and professional installers who need a direct-fit solution with durable construction. Choose this if you want a simple, OEM-like replacement that minimizes leak risk after modifications. Caution: verify your Gen IV oil pan model to ensure compatibility; some Gen IV configurations may require additional fitment checks.
Wllead LS Oil Pan Oil Pressure Relief Valve Plug
Wllead designs a versatile oil pressure relief valve plug intended to replace the secondary relief valve in 2007–2013 Gen IV LS engines. It targets a broad range of LS-based vehicles, including mainstream pickups and performance platforms, covering 4.8L, 5.3L, 6.0L, and 6.2L configurations. By removing the valve prone to clogging, this plug helps steady oil pressure and protect engine components from pressure drop. Best for: owners seeking broad compatibility across several LS platforms without extensive customization. Limitation: confirm exact engine variant to ensure fitment matches your vehicle’s model and year.
Yubunt LS Oil Pan Oil Pressure Relief Valve Plug
Yubunt offers a valve plug kit that includes one safety valve plug and two gaskets. It uses high-quality materials designed to endure engine conditions and supports a broad LS-powered range, including LS1, LS2, LS3, LS6, and newer variants across 4.8L to 6.2L engines. Best for: buyers who want a complete gasket-inclusive package for a reliable seal. Consideration: ensure your exact engine model aligns with the listed compatibility, as some LS configurations may require model-specific adaptations.
Podavelle LS Oil Cooler Bypass Block-Off Plate
Podavelle’s block-off plate serves to bypass the oil cooler feed port to the oil cooler return port in LS oil pans, commonly used for factory oil cooler plumbing. Constructed from heavy-duty 6061-T6 aluminum with an anodized finish, it enables improved internal oil flow by removing restrictions at the cooling port. Best for: users modifying oil cooler plumbing rather than simply replacing a valve. Limitation: this is not a direct valve plug; it alters oil cooler routing and may require additional gaskets and mounting hardware for a leak-free setup.
Saillong LS Billet Oil Cooler Block Off Plate
Saillong’s billet oil port block-off plate targets Gen III and IV LS engines, including LS3, LS1, LS2, LS6, and variants like L92 and L76. It emphasizes high compatibility and a simple installation that seals the oil pan while bypassing the oil cooler. Best for: builders seeking a lightweight, corrosion-resistant aluminum plate for leak prevention during LS engine installations. Limitation: like other plates, verify engine and oil pan compatibility to avoid fitment issues during installation.
2Pcs Oil Pressure Relief Valve Plug (Gen IV LS)
CuraceQ provides a bundle of two oil pressure relief valve plugs designed for LS 2007–2013 Gen IV engines with M12 x 1.75 and a 15mm hex head. This option is practical for those replacing both plugs or ensuring spares while performing AFM/DOD/VVT modifications. Best for: customers who prefer a value-packed solution and want a backup plug. Caution: confirm exact engine model match prior to purchase to avoid misfit with certain Gen IV variants.
Kamrexi Oil Pressure Relief Valve Bypass Kit
Kamrexi’s kit targets 2007+ Gen IV LS engines with a precise M12×1.75 thread and 15mm hex head design for direct installation. It aims to bypass the secondary relief valve to address clogging and pressure drop after AFM/DOD/VVT conversions, with a heavy-duty steel construction and upgraded washer for sealing reliability. Best for: specialists seeking a dedicated LS bypass kit with robust seals. Limitation: verify exact engine variant to ensure full compatibility.
Buying Guide
What to consider when choosing an LS oil bypass delete kit?
- Engine generation and model: Confirm Gen III vs Gen IV compatibility and the exact engine family (LS3, L99, L96, etc.).
- Type of bypass: Valve plug versus oil cooler block-off plate. Valve plugs target relief valves; plates modify oil cooler plumbing.
- Material and durability: Steel plugs offer strong resistance to heat and vibration; aluminum plates are lighter and corrosion-resistant.
- Sealing hardware: Look for included crush washers or upgraded gaskets for reliable sealing under pressure.
- Installation requirements: Direct-fit parts should require no modification; some plates may require additional hardware.
- Compatibility checks: Some listings claim broad compatibility; verify your exact vehicle, year, and piston/AFM/DOD/VVT setup.
Frequently Asked Questions
- What is the purpose of an oil bypass valve plug?
- Can I install a bypass plug myself?
- What should I consider before choosing a block-off plate?
- Are all LS engines compatible with these parts?
- Do these parts affect warranty or engine seals?
It bypasses the secondary relief valve to prevent clogging and reduce pressure drops after engine modifications that affect AFM, DOD, or VVT systems.
Yes, most direct-fit plugs require basic hand tools and no welding or major modifications, but confirm fitment for your engine model.
Block-off plates bypass oil cooler ports and improve oil flow; they are not substitutes for valve plugs and may change cooling dynamics.
Most Gen III and Gen IV LS engines are supported, but always verify exact model, year, and engine configuration before purchase.
Improper installation can compromise seals; use OEM-like gaskets and follow torque specs to minimize risk.