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Description
Hooker Exhaust Manifolds 8501-3HKROverview Hooker cast iron exhaust manifolds have been designed to hug close to the engine block so they fit into a wide variety of replacement and engine swap applications. Their contoured design aims the exhaust directly at the exit port for improved flow. Being cast iron means they will provide years of leak free performance with less under hood noise than traditional headers. Plus, their shorty design means you can route exhaust tubing close to
Overview
Hooker cast iron exhaust manifolds have been designed to hug close to the engine block so they fit into a wide variety of replacement and engine-swap applications. Their contoured design aims the exhaust directly at the exit port for improved flow. Being cast iron means they will provide years of leak-free performance with less under hood noise than traditional headers. Plus, their shorty design means you can route exhaust tubing close to your frame/floor pan for maximum ground clearance. "Hook" up your GM LS engine with Hooker cast iron manifolds today!
Features
- Intended for all GM LS (except LS7 and LS9) engine swap applications where durability, quiet operation, emissions compliance and leak-free sealing is desired
- Available in plain as-cast finish or with various Hooker ceramic coatings for reduced engine compartment temps and improved corrosion resistance
- 304 stainless steel mating flanges included (mating flange fasteners are not included)
- 2.25-inch outlet diameter
- 2 bolt exit flange configuration matches 2010 Camaro (also the same as the E-rod exhaust manifolds) which can be used with OE gaskets and fasteners if desired, for an OE quality seal
- Cast from Hi-Silicon-Moly Ductile Iron to provide durability and corrosion resistance
- Free-flowing for good performance and catalytic converter efficiency
- Tight tuck design provides universal fit for most popular chassis and a clean traditional muscle car appearance - ideal for GM E-Rod installations
- Recommended for strong performance on engines making up to 500 horsepower (For optimum high rpm performance see Hooker long tube engine swap headers)
- Perfect complement to Hooker engine swap mount plates and Holley engine swap oil pans
Application
- Not compatible with 2004-2006 GTO starters/bellhousings. Although designed as a stock replacement, this product does not have a C.A.R.B. Executive Order Exemption and therefore may or may not be legal for any particular pollution controlled application. Check with your state or local governmental authority regarding approval for your application. Have been validated thus far for fitment on 1970-81 GM F-bodies, 82-88 GM G-bodies and 68-72 GM A-bodies.
Specs
| Brand | Hooker |
| Collector Diameter | 2-1/4 inch |
| Emission Code | 4 |
| Header Finish | Black Ceramic |
| Header Style | Manifold |
| Primary Tube Dia. | 1-5/8 inch |
| Product Type | Manifold |
| Tube Material | Cast Iron |
| Warning | California Proposition 65 |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.3 ★★★★★
Based on 10 reviews
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Product Reviews
★★★★★ 5
Great
Great little shelves, easy to put together, very sturdy.
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Reviewed in the United States on March 8, 2026
★★★★★ 5
Good shelves!
Easy enough to assemble and as shown in the pictures you can shape the shelves how you want them. There is one screw hole in the mounting bracket right in the narrow part which makes it difficult to get a screw into. To get around this I just put a screw in at an angle. The quality is decent and I would not overload these by any means. However, if you are looking for cheaper shelves that look decent for light items these will work great.
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Reviewed in the United States on July 10, 2025
★★★★★ 3
Great shelves for the price (~$15), but could be better.
Unlike many others here reviewing the item, I took note of the dimensions & the rough surface of the wood *before* purchasing it & read the instructions that tells you how NOT to assemble it. So my review won't be mentioning how it was smaller than I expected, how unexpectedly rough the wood was, or the fact that it fell off my wall because I didn't read the instructions.
About how NOT to install it- never screw into the board such that the weight is relying on the *screws* to keep it up. Whichever way you place the brackets in relation to the wood, above or below, make sure the weight is ON THE BRACKETS. In other words, *never* screw in from THE TOP OF the shelf.
The instructions specifically point this out, so if you see any reviews about the screws stripping out of the wood and the thing crashing to the floor-- they didn't read the instructions and they assembled it incorrectly.
And no, unlike what some reviews here are telling you, it is not painted plastic. It is wood.
I sanded it, it's wood. They tell you that in the description of the item, too.
Paulownia, but yes, the weight of it reminds you of styrofoam, which isn't a bad thing. Ive read its a sturdy wood, relative to how much it weighs.
I was already expecting rough boards when I bought it, but on top of that fact the surface had the grossest hand-feel I've ever felt (probably from the surface + the paint they used) that I ended up lightly sanding it with 120 grit (which helped a ton with the feel while also doing very little to the painted surface) and painted it with some white paint that we had on hand (it was originally grey). Much better.
The brackets getting in the way of screwing is awful because I don't have a 90° angle screwdriver, but it worked out alright enough. The resulting angle wasn't severe by any means, but still I recommend making sure you have a 90° angle screwdriver before purchasing because I'd much rather it be nice, clean, flush screws.
One point of serious suggestion for the seller would be that the brackets need more than a quick dot of welding. Even though my brackets came relatively even and all with unbroken welding, judging from other reviews and looking at mine, this is an area that could definitely do with some improvement.
Another suggestion for the seller would be to include a few extra drywall anchors. I ended up breaking three of them trying to get them in my drywall and now I have to go find some replacements.
I think our drywall is about as petrified as our studs because in looking up external sources for the best method of installing these types of anchors (to make sure I wouldn't break any. smh) they recommend to NOT predrill, as these are made with no predrilling in mind.
However, when trying to initially gently hammer them in with my rubber mallet as the instructions stated, they just weren't penetrating the drywall very far and I even made sure to pierce the paint layer (which is recommended if your walls have a thick layer of paint from over the years). I actually ended up quite extensively drilling in order to get the first portion of the anchors (before the threads) into the wall without doing too much damage to the anchors.
Ive gotten two of the three shelves up but can't get the last one up until I get more drywall anchors. So far so good. Lightly hand sanded and a couple coats of paint slapped on them and I quite like them.
Definitely takes a lot of time installing them though, so expect that before going into it.
Rated 3 stars for the gross hand-feel, the brackets needing more welding, the brackets that could've been more even with each other, the lack of warning that you'd need a 90° angle screwdriver, and the lack of backup drywall anchors.
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Reviewed in the United States on November 1, 2023
★★★★★ 5
WOULD buy again!!
Color: Dark Brown
VERY STURDY! Id buy them again. Easy to clean & hang on the wall. Look good hanging up. Weight capacity is more then i thought it would be.
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Reviewed in the United States on January 16, 2026
★★★★★ 5
style, durability, and functionality
The Amada HOMEFURNISHING Floating Wall Shelves offer a perfect blend of style, durability, and functionality. Whether you're looking to display decorative items or need extra storage space, these shelves are a valuable addition to any room. Their easy installation and sturdy design make them a worthwhile investment for enhancing your home's decor.
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Reviewed in the United States on May 1, 2025