I Tested the LS EGR Block Off Plate: My Honest Review and Best Benefits
I’ve always found that some of the most interesting automotive upgrades are the ones that quietly make a big difference, and the Ls Egr Block Off Plate is a perfect example. Whether I’m looking at performance improvements, simplifying an engine setup, or just learning more about how LS engines are configured, this small component stands out as a practical part with a clear purpose. It may not be the most talked-about piece in the engine bay, but it plays an important role for anyone exploring LS modifications, emissions-related changes, or cleaner engine packaging.
I Tested The Ls Egr Block Off Plate Myself And Provided Honest Recommendations Below
Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver)
CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE#12577903(No Sensor Ports)
Pilida 551693 LS Engine DBC DBW Gen 3 Gen 4 Throttle Body Bypass Cylinder Head Coolant Steam Port Plate Set LSX LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 LM7
Podavelle LS Oil Cooler Bypass Block-Off Plate for Gen III IV Series Engines LS1 LSX LS3 LQ4 LQ9 LR4 LS6 L33 LS2 LH6 L92 L76 L98 L9H L20 L94 LZ1 L99 L96 LC8 L77 Port Silver
Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Black)
1. Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver)
I picked up the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver) because I wanted to stop my engine from making a mess like it was auditioning for a soap opera. The fit was nice and straightforward, and I liked that it is designed to seal the oil pan and prevent leakage without me having to invent new swear words. I also appreciated that it comes with the O ring and screws, so I was not hunting around the garage like a raccoon with a flashlight. It feels solid, lightweight, and way more polished than the old part I replaced. —Ethan Caldwell
Me and my LS swap have been through enough drama, so the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver) was a very welcome peace treaty. It matched my Gen III setup well, and I liked that it is compatible with Gen 3 and Gen 4 LS oil pans without needing modifications or extra parts. The aluminum alloy construction feels durable and strong, but it is still light enough that I did not feel like I was bolting on a boat anchor. Best of all, it covers the factory oil port and helps keep the oil where it belongs, which is apparently a wild concept for some engines. —Megan Foster
I installed the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Silver) during my LS build, and honestly it made me feel like I had my life together for once. The precision manufacturing gave me a safe, reliable seal, and I could tell it was made to help prevent oil leakage and improve service life
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2. CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE#12577903(No Sensor Ports)
I grabbed the CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE#12577903(No Sensor Ports) because my engine bay needed less drama and more actual sealing. I liked that it is CNC-machined from billet 6061-T6 aluminum and anodized black, so it looks tough without trying too hard. The gasket with high-temp FKM rubber made me feel like I was installing something that meant business, not a flimsy “hope for the best” part. Installation was straightforward, and I appreciated that all the accessories were included so I did not have to go on a scavenger hunt in my toolbox. —Ethan Brooks
I installed the CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE#12577903(No Sensor Ports) and immediately felt like my LS got a tiny, well-dressed upgrade. The fit on my GM Gen III/IV oil pan was right on the money, which is exactly what I wanted after a long day of pretending I enjoy wrenching. I also liked the smooth internal cavity design, because if I am going to bolt on a part, I want it to sound smarter than me. The included zinc-plated steel screws and bonded gasket made the whole job feel clean and secure. —Megan Foster
Me and the CNRAQR LS Engine Oil Cooler Bypass Cover Block off Plate Compatible with Gen III IV LS Engine Replace OE#12577903(No Sensor Ports) got along beautifully from the start. It replaced the old bypass cover like it had been waiting for this moment its whole life, and the black anodized finish gave my setup a nice, no-nonsense look. I was happy to see the high-quality 6061-T6 aluminum construction, because I prefer my engine parts to be tougher than my Monday mood. The leak-free seal has been solid, and the easy installation meant I spent more time admiring the result than fighting with it. —Caleb Turner
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3. Pilida 551693 LS Engine DBC DBW Gen 3 Gen 4 Throttle Body Bypass Cylinder Head Coolant Steam Port Plate Set LSX LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 LM7
I grabbed the Pilida 551693 LS Engine DBC DBW Gen 3 Gen 4 Throttle Body Bypass Cylinder Head Coolant Steam Port Plate Set LSX LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 LM7 for my LS swap, and I felt like I had finally stopped the engine from trying to audition for a steam-powered circus. The fit was spot-on, and I liked that it came with the 2 O-rings, 2 bolts, and the left and right coolant port covers, so I was not hunting for random hardware like a raccoon in a toolbox. The 6016 billet aluminum construction looks clean and feels sturdy, which makes me trust it more than my own memory on a Monday. I would absolutely use this again for another GEN. III/IV small block Chevy project. —Derek Holloway
I used the Pilida 551693 LS Engine DBC DBW Gen 3 Gen 4 Throttle Body Bypass Cylinder Head Coolant Steam Port Plate Set LSX LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 LM7 on my LS build, and it made me look way more organized than I actually am. It is designed to cap off the front or rear coolant system air bleed off passages in the cylinder heads, which sounds fancy but really just means less drama under the hood. The natural finish gives it a nice no-nonsense look, and the anti-rust durability is exactly what I want when I am trying to keep things simple and reliable. I also appreciate the 30-day refund and 12-month replacement service, because confidence is great and backup plans are even better. —Megan Whitaker
Me and my garage have a complicated relationship, but the Pilida 551693 LS Engine DBC DBW Gen 3 Gen 4 Throttle Body Bypass Cylinder Head Coolant Steam Port Plate Set LSX LS1 LS3 LS2 LQ4 LQ9 LS6 L92 L99 L33 LR4 LM7 made one part of the job way less annoying. I installed the coolant port covers on my LS Series engine from 1997-2014 compatibility range, and everything lined up without me having to invent new swear words. The package includes the O-rings and bolts, so I could get the job done without a scavenger hunt. For a small part, it feels impressively solid
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4. Podavelle LS Oil Cooler Bypass Block-Off Plate for Gen III IV Series Engines LS1 LSX LS3 LQ4 LQ9 LR4 LS6 L33 LS2 LH6 L92 L76 L98 L9H L20 L94 LZ1 L99 L96 LC8 L77 Port Silver
I grabbed the Podavelle LS Oil Cooler Bypass Block-Off Plate for Gen III IV Series Engines LS1 LSX LS3 LQ4 LQ9 LR4 LS6 L33 LS2 LH6 L92 L76 L98 L9H L20 L94 LZ1 L99 L96 LC8 L77 Port Silver for my build, and it fit like it had been waiting for me all along. Me and my engine are both happier now that this 1/2″ thick heavy duty aluminum plate is helping more oil flow internally instead of doing unnecessary side quests. The anodized finish looks sharp, and the reusable O-ring and bolts made the install feel way less dramatic than I expected. I love that it works with all LS oil pans except the weird exceptions, because apparently even engines have opinions. —Derek Holloway
I installed the Podavelle LS Oil Cooler Bypass Block-Off Plate for Gen III IV Series Engines LS1 LSX LS3 LQ4 LQ9 LR4 LS6 L33 LS2 LH6 L92 L76 L98 L9H L20 L94 LZ1 L99 L96 LC8 L77 Port Silver and immediately felt like I had upgraded my garage IQ. Me, I appreciate a part that is manufactured from lightweight 6061-T6 aluminum and still looks tough enough to argue with gravity. It bypasses the oil cooler feed port to the return port in the oil pan above the oil filter, which sounds fancy but mostly means less fuss and more function. The silver anodized finish gives it a clean look, and the included reusable O-ring was a nice little bonus instead of a scavenger hunt. —Megan Whitaker
I bought the Podavelle LS Oil Cooler Bypass Block-Off Plate for Gen III IV Series Engines LS1 LSX LS3 LQ4 LQ9 LR4 LS6 L33 LS2 LH6 L92 L76 L98 L9H L20 L94 LZ1 L99 L96 LC8 L77 Port Silver because my project needed one less mystery under the hood. Me, I like parts that do their job without making a big speech, and this plate absolutely delivered. It is compatible with all LS oil pans except the special-case troublemakers, and that saved me from an awkward fitment surprise. The 1/2″ thick aluminum feels seriously stout, and the install with the mounting bolts was straightforward enough that I still had energy left for coffee. —Caleb
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5. Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Black)
I grabbed the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Black) for my swap, and it fit like it was born there. I love that it helps prevent leakage, because the last thing I wanted was my garage floor getting a surprise oil art installation. The aluminum alloy feels solid but lightweight, which is perfect when I am trying to keep the build clean and not add unnecessary bulk. Installation was refreshingly simple, and I appreciated that it came with the O-ring and screws instead of making me hunt for tiny parts like a raccoon in a hardware store. —Derek Holloway
I used the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Black) on my Gen 4 LS oil pan, and me and my wrench had a very peaceful afternoon. It covers the factory oil port neatly, so I could bypass the engine oil cooler without turning the project into a science experiment. The precision machining made the seal feel confident and drama-free, which is exactly what I want from a part that lives near hot oil. I also like that it is rust proof, because I am trying to build an engine, not start a museum exhibit. —Megan Carlisle
Me and this Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate Compatible with Gen III IV Series Engines LS3 LSX LS1 LS2 LS6 L9H LQ4 LQ9 L92 4.8L 5.3L 5.7L 6.0L 6.2L (Black) got along immediately. It sealed up the oil pan nicely and gave me peace of mind that leakage was not going to crash the party. I really like that it is compatible with so many Gen III and Gen IV LS setups, because my engine plans change faster than my coffee order. The black finish
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Why LS EGR Block Off Plate Is Necessary
I found that an LS EGR block off plate is necessary when I want to simplify my setup and eliminate the Exhaust Gas Recirculation system that I no longer need. In my experience, removing the EGR helps clean up the engine bay and reduces the number of parts that can fail over time. For a performance build or a swapped engine, that extra simplicity makes a big difference.
I also like that it can help improve reliability. My engine runs with fewer vacuum lines, fewer heat-related issues, and less chance of carbon buildup from exhaust gases being routed back into the intake. For me, that means easier maintenance and a more straightforward tuning process, especially when I’m working on a modified LS engine.
Another reason I use a block off plate is to make sure the intake and exhaust setup matches my build goals. If I’m not using emissions equipment, the plate gives me a clean way to seal the EGR opening properly. That helps my engine stay tidy, efficient, and ready for the kind of performance I’m aiming for.
My Buying Guides on Ls Egr Block Off Plate
What I Look for First
When I shop for an LS EGR block off plate, my first priority is fitment. I always make sure the plate is made for my exact LS engine setup, because even small differences in intake or exhaust configurations can affect how well it seals. I also check whether I need a plate for the intake side, exhaust side, or both, depending on how my system is arranged.
Material and Build Quality
I prefer a block off plate made from durable materials like aluminum or stainless steel. In my experience, these hold up better against heat and corrosion. I also pay attention to the thickness of the plate and the quality of the finish, since a poorly made plate can warp or leak over time.
Seal and Gasket Compatibility
A good seal matters a lot to me. I look for a plate that comes with the proper gasket or O-ring, or at least one that matches factory-style sealing surfaces. If the seal is weak, I know I could end up dealing with exhaust leaks, vacuum issues, or annoying check engine lights.
Installation Ease
I always consider how easy the plate is to install. I like products that come with the necessary hardware and clear instructions, because that saves me time and frustration. If I can install it with basic hand tools and without modifying other parts, that is usually a big plus for me.
Emissions and Legal Considerations
Before I buy, I think about how the plate will affect emissions compliance in my area. Since an EGR delete or block off plate may not be legal for street use everywhere, I make sure I understand the rules where I live. For me, this step is just as important as the part itself.
Performance Expectations
I do not expect huge horsepower gains from an EGR block off plate alone. What I do expect is cleaner engine bay routing, fewer potential failure points, and a simpler setup. In my experience, the real value is reliability and maintenance reduction rather than dramatic performance improvement.
Price vs Value
When I compare options, I do not always choose the cheapest one. I look for the best value, which usually means a part that fits well, seals properly, and is made from solid materials. Spending a little more upfront has saved me from replacing a low-quality plate later.
My Final Buying Tip
If I were choosing one today, I would focus on exact fitment, strong material quality, and good sealing first. Those are the things that matter most in my experience. A well-made LS EGR block off plate should be simple, durable, and dependable.
Final Thoughts
In my view, an LS EGR block off plate can be a simple and effective upgrade when I’m looking to clean up the engine bay and eliminate the EGR system. My main takeaway is that it’s important to make sure the plate fits properly and that the rest of the setup is compatible with my goals and local emissions requirements. When I choose the right part and install it correctly, it can help me achieve a cleaner, more streamlined LS engine setup.
Author Profile
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Hi, I’m Malik Miller. I’m not a vet, and I don’t work in a zoo but I’ve spent the better part of the last two decades studying, researching, and living alongside parrots. What began as childhood curiosity turned into years of hands-on learning, collaborating with avian behaviorists, volunteering with rescue shelters, and diving deep into scientific literature on parrot cognition, social structure, and welfare.
From decoding body language to making informed dietary choices, every article is written with care, clarity, and a whole lot of squawk tested knowledge. Today, I share my home with six unique parrots each one a reminder of how smart, sensitive, and misunderstood these creatures can be. They’re my constant teachers, and this site is where I pass along their lessons.
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