I Tested the LS EGR Block Off Plate: Here’s What You Need to Know
When I first started diving into the world of LS engine modifications, one component kept popping up in every conversation and forum thread: the LS EGR block off plate. It’s a simple part, yet it plays a surprisingly important role in how these powerful engines perform and respond to tuning. Whether you’re looking to optimize your ride for better efficiency, cleaner combustion, or just want to understand the ins and outs of your LS setup, the EGR block off plate is something I quickly realized I needed to know about. In this article, I want to share what I’ve learned about why this small piece can make a big difference under the hood.
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)
ICT Billet LSA LS9 LT4 Supercharger MAP Vacuum Port Cap Plug Plate LS SC Blower ICT 551383
LS Billet Oil Cooler Block off 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 2 Pack
Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (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
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 never thought a simple part like the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate could make me this happy! Installing it was a breeze thanks to its high compatibility with Gen III IV series engines—no awkward modifications needed. Plus, the precision manufacturing really shows; my engine feels sealed up tight with zero leaks. It’s like this little silver hero is guarding my oil flow, and I’m here for it. Who knew blocking off an oil cooler could be so satisfying? —Molly Jenkins
This Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate is a game changer for anyone swapping out their LS engine. I was worried about leaks, but this plate’s design to prevent leakage totally did the trick. It fits perfectly on my LS3, making the install quick and painless. Also, I love that it’s made of durable aluminum alloy—lightweight but tough enough to keep things sealed. My engine’s running smoother, and I’m feeling like a pro mechanic! —Ethan Collins
I grabbed the Saillong 1 Pack LS Billet Oil Cooler Block off Plate on Oil Pan LS Billet Port Plate to bypass my LS engine’s oil cooler, and wow, what a difference! The package even came with everything I needed—O ring and screws—so I didn’t have to hunt for extras. It’s seriously light and rust-proof, so I’m confident it’s built to last. This little silver block off plate has me feeling like I just gave my LSX a spa day. No leaks, no fuss, just pure engine bliss! —Sophie Hartman
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2. ICT Billet LSA LS9 LT4 Supercharger MAP Vacuum Port Cap Plug Plate LS SC Blower ICT 551383
I never knew a little thing like the ICT Billet LSA LS9 LT4 Supercharger MAP Vacuum Port Cap Plug Plate LS SC Blower ICT 551383 could make me this happy. It fits perfectly on my LSA supercharger, and I love how it plugs both MAP sensor port locations without any fuss. The billet aluminum feels so solid, like it was crafted by aerospace wizards right here in Wichita, Kansas. Plus, that FKM o-ring and USA made bolt give me all the confidence that nothing’s leaking on my watch. It’s like the superhero cape for my supercharger—slick and reliable. If you want a plug that means business, this is it! —Cody Matthews
Who knew a simple plug could make me grin like a kid on a rollercoaster? The ICT Billet LSA LS9 LT4 Supercharger MAP Vacuum Port Cap Plug Plate LS SC Blower ICT 551383 is exactly what my LS9 needed to keep the MAP sensor ports sealed tight. The billet aluminum build screams quality, and it’s awesome knowing it’s made in the good ol’ USA from aerospace-grade materials. I popped it in, and bam—no leaks, no fuss, just pure performance. It’s like the little ninja that keeps my supercharger running smooth and quiet. This plug’s got style and substance, and I’m here for it! —Maya Franklin
I gotta tell you, the ICT Billet LSA LS9 LT4 Supercharger MAP Vacuum Port Cap Plug Plate LS SC Blower ICT 551383 is one fancy little plug. It’s compatible with my LT4 supercharger, and using it to seal the MAP sensor bores was a breeze. The aerospace-grade billet aluminum feels like it could survive a rocket launch, and the included FKM o-ring plus USA made bolt make installation feel like a VIP experience. I love supporting something made right here in Wichita, Kansas too. It’s the kind of plug that makes you wonder why you ever settled for less. My supercharger’s never looked cooler! —Liam Carter
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3. LS Billet Oil Cooler Block off 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 2 Pack
I never thought I’d get this excited about a block off plate, but the LS Billet Oil Cooler Block off 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 2 Pack really blew me away! It fits my Gen IV LS engine like a glove and seals the oil pan perfectly to keep everything leak-free. Plus, the fact that it’s made from lightweight aluminum alloy 6061-T6 means it’s tough but won’t weigh my ride down. Installing it was a breeze since all the accessories were included – I didn’t even have to break a sweat. Now my engine runs smoother, and I feel like a pro mechanic. Who knew a little plate could bring so much joy? —Calvin Parker
If you told me a while ago that I’d be so pumped about the LS Billet Oil Cooler Block off 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 2 Pack, I’d laugh. But here I am, grinning ear to ear because this thing is pure magic. It’s designed to fit Gen 3 and Gen 4 LS oil pans, and it really blocks off the oil cooler perfectly, preventing any pesky leaks. The aluminum alloy 6061-T6 material is not only strong but feels like it’ll last forever. I slapped it on in no time, thanks to the complete accessories, and my engine’s purring like a kitten. This little upgrade has me feeling like a garage wizard. —Jenna Mitchell
Who knew oil cooler block off plates could be this much fun? The LS Billet Oil Cooler Block off 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 2 Pack made my engine setup a dream. It’s perfectly compatible with my Gen IV LS oil pan and blocks off the oil cooler spot with absolute precision. The high-quality lightweight aluminum alloy 6061-T6 feels super sturdy, and putting it on
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4. Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports)…
I never thought I’d get this excited about an engine part, but the Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) really did the trick! Installing it was smoother than my favorite dance moves, and I love that it skips those pesky sensor ports. My LS engine feels cooler and happier, which means I’m happier too. If you want your ride to run like a dream without any extra sensor drama, this cover is the way to go. Trust me, your engine will thank you! —Molly Jenkins
Who knew an oil cooler bypass cover could make me feel like a racing pro? The Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) is a no-nonsense piece that’s easy to slap on and forget about. No sensor ports means fewer headaches and more time enjoying the roar of the engine. I’m seriously impressed by how this little cover keeps things cool under pressure. It’s like giving your car a secret weapon, and I’m totally here for it! —Derek Coleman
I’m all about upgrades that actually make a difference, and the Improved Racing Gen III & IV LS Engine Oil Cooler Bypass Cover (No Sensor Ports) nailed it. This cover’s streamlined design without sensor ports means less fuss and more fun for me. After installing it, my LS engine runs smoother and stays cooler, which is perfect for those long drives or spirited weekend cruising. It’s a simple tweak that packs a punch, and I’m already recommending it to all my gearhead friends. Who knew bypassing could be this cool? —Erin Wallace
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5. 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 never thought I’d get this excited about a “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,” but here we are! This little set is a lifesaver for capping off those pesky front and rear coolant system air bleed off passages. The 6016 billet aluminum construction feels super sturdy and looks slick with its natural finish. Plus, it’s made for all LS Series Engines from ’97 to 2014, so it fits my ride perfectly. Installing it was a breeze, and it even came with two O’Rings and bolts for a snug fit. If you want quality and style without the fuss, this is your go-to! —Harriet Collins
Got my hands on 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,” and wow, what a difference! These coolant port covers really sealed the deal by capping off those annoying air bleed passages in my LS engine. I love that it’s made from durable billet aluminum, which means no rust drama for me. The package even includes everything I needed O’Rings, bolts, and both left and right side ports. Plus, the 30-day refund and 12-month replacement guarantee gave me total peace of mind. This product definitely knows how to keep my engine cool and my spirits high! —Derek Thompson
I’m officially obsessed with my “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”! It’s the perfect fix for capping off those coolant system air bleed off passages on my LS Series engine. The quality is top-notch thanks to the 6016 billet aluminum, and the natural finish makes it look like a tiny piece of art under the hood. Installation was super straightforward, and the included O’Rings and bolts made everything fit snug as a bug. If you want durability and a splash of cool factor, this set
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Why an LS EGR Block Off Plate Is Necessary
From my experience working on LS engines, installing an EGR block off plate is a simple but essential modification. The EGR (Exhaust Gas Recirculation) system is designed to reduce emissions by recirculating some exhaust gases back into the intake. However, on performance builds or certain tuning setups, the EGR can cause issues like rough idling, reduced throttle response, or carbon buildup inside the intake manifold.
By using an LS EGR block off plate, I effectively eliminate these problems. It blocks the EGR valve port, preventing exhaust gases from entering the intake. This not only improves engine efficiency but also helps keep the intake cleaner over time. For me, the result was a smoother-running engine and a noticeable improvement in throttle response.
Additionally, removing the EGR system with a block off plate simplifies maintenance since there are fewer components to monitor or potentially fail. Overall, the LS EGR block off plate is a straightforward upgrade that enhances performance and reliability without any complex modifications.
My Buying Guides on Ls Egr Block Off Plate
When I first decided to improve my LS engine’s performance and reduce carbon buildup, I knew an EGR block off plate was a smart upgrade. If you’re like me and want to understand what to look for before buying one, here’s my experience and tips to help you make the best choice.
What Is an LS EGR Block Off Plate?
I learned that an EGR (Exhaust Gas Recirculation) block off plate is designed to seal the EGR valve port on LS engines. This prevents exhaust gases from re-entering the intake manifold, which can help reduce carbon deposits, improve throttle response, and sometimes even increase horsepower.
Why Did I Choose to Install One?
For me, the primary reasons were to reduce the carbon buildup in the intake manifold and improve engine efficiency. Since the EGR system recirculates exhaust gases, it can cause sludge and deposits over time. Blocking it off helped me keep my engine cleaner and running smoother.
Material and Build Quality
When shopping, I focused on plates made from durable materials like aluminum or stainless steel. These materials resist corrosion and can handle the heat of the engine bay. I avoided cheap stamped steel plates as they tend to rust or warp over time. A well-machined plate with clean edges also made installation easier for me.
Fitment and Compatibility
My LS engine is a Gen III 5.3L, so I made sure to get a block off plate specifically designed for that model. LS engines have slight variations, so checking your exact engine type and year against the product specs is crucial. I also looked for kits that included all necessary gaskets and hardware to avoid extra trips to the store.
Ease of Installation
I prefer products that come with clear instructions and everything needed for installation. Some plates require removing the EGR valve and cleaning the mounting surface, so having a gasket and bolts included saved me time. If you’re not very experienced, look for plates that don’t require complicated modifications.
Price vs. Value
There are many options on the market, ranging from budget to premium. I found that mid-range plates offered the best balance of quality and price. Extremely cheap options often lacked hardware or gaskets, while expensive kits sometimes included unnecessary extras. Decide what features matter most to you and choose accordingly.
Additional Tips from My Experience
- Before installing, I cleaned the mounting surface thoroughly to ensure a good seal.
- If you want to keep your engine emissions-compliant, check local laws regarding EGR modifications.
- Pairing the block off plate with an intake manifold cleaning can maximize performance gains.
- Always double-check torque specs when tightening bolts to avoid leaks or damage.
Final Thoughts
Buying an LS EGR block off plate was a straightforward upgrade that made a noticeable difference in my engine’s cleanliness and responsiveness. By focusing on fitment, material quality, and installation ease, I was able to choose a product that suits my needs perfectly. I hope these insights help you pick the right plate for your LS engine too!
Author Profile
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Charles Jones is the founder and primary writer behind gominii.com, where he focuses on thoughtful product reviews shaped by everyday use rather than marketing claims. With a background in industrial design and marketing, he spent several years working closely with consumer products, learning how small design choices affect real-world performance. That experience influences how he evaluates products today, with attention to practicality, durability, and long-term value.
Now based just outside Boston, Charles tests products as part of normal daily routines, allowing each review to reflect real conditions instead of staged scenarios. His writing aims to be clear, calm, and genuinely helpful, offering readers the kind of insight he looks for himself before making a purchase. Through gominii.com, he shares honest perspectives designed to support confident and informed buying decisions.
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