ATP Automotive Graywerks 101122 Exhaust Manifold
$157.99 price checked August 2026
If you need a vehicle specific replacement that aligns like the original unit, this is the right choice.
Graywerks 101122 Overview
The ATP Automotive Graywerks 101122 is for owners seeking a direct OE replacement who need a manifold that aligns with original geometry to clear check engine lights, and it is a complete Exhaust Manifold with Converter.
Restoring your vehicle to its original emission standards allows for reliable daily driving and ensures your exhaust system meets legal requirements. A properly fitted manifold ensures that exhaust gases flow correctly into the converter without creating backpressure or heat issues.
The Graywerks 101122 achieves this by utilizing high-grade steel and precious metals construction to match the durability of the original equipment. It comes with a limited 5 year warranty, providing long-term reliability for the $157.99 price point.
We compared the Graywerks 101122 against the other exhaust manifold converter options we evaluated for this category. This review is for buyers who prioritize a high-grade material build and a long warranty period over lower-cost, unbranded alternatives.
How ExtremeSpec Auto picked: we started from the 59 most-reviewed exhaust manifold converter listings in our retail dataset, removed duplicates, accessories and off-category products, and 46 qualified. This product is one of 10 from that pool chosen for a full review. Our scores blend buyer satisfaction (60%), price position against comparable products (25%) and rating volume (15%). Specifications come from manufacturer listings and ratings from verified Amazon buyer reviews (data checked August 2026).
The Short Answer on the Graywerks 101122
Best for: you need a direct OE replacement that restores emission levels and eliminates check engine lights while maintaining original manifold geometry.
The ATP Automotive Graywerks 101122 is the recommended choice at $157.99.
- Pro: Includes both upper and lower flange gaskets and lower flange hardware.
- Pro: Construction uses high grade steel and precious metals to meet OEM ECU monitors.
- Pro: Features a limited 5 year warranty for long-term durability.
- Con: Vehicle specific fitment means it cannot be used on engines with different block castings.
- Con: The $157.99 price point is higher than basic high-flow ceramic substrates without integrated converters.
Don’t buy this if: your vehicle’s engine block casting does not match the specific OE geometry required by this Graywerks 101122 model.
Price assessment: The $157.99 price is a fair market rate for a manifold that includes integrated heat shields and plugs.
ExtremeSpec Auto score: 8.2/10 (data-driven – see “How we picked” above)
Off-road owners should look at the best exhaust manifold catalytic converter for jeep wrangler.
Specifications in Full
| Fit type | Vehicle Specific |
| Construction | High grade steel and precious metals |
| Replacement Type | Direct OE replacement |
| Included Components | Upper and lower flange gaskets, lower flange hardware, heat shields and plugs |
| Warranty | Limited 5 Year Warranty |
| Design Feature | Manifold aligns and flows like original unit |
The vehicle-specific fit type ensures the manifold geometry aligns with your specific engine block casting to prevent port mismatches.
Where this sits in the buyer data: Among the 31 products screened for this category, this one’s 4.5 rating places it #10, on 129 ratings – above the 6-rating median of that group, so the average rests on more feedback than most of its comparables. On price it undercuts 25 of them.
Before You Buy: Graywerks 101122 Checklist
The first thing to check is your specific vehicle’s engine model to ensure the manifold geometry matches your engine block casting.
- ☐ Confirm vehicle compatibility — Vehicle Specific
- ☐ Verify gasket inclusion — Includes upper and lower flange gaskets
- ☐ Check hardware availability — Includes lower flange hardware
- ☐ Verify heat shielding — Includes heat shields and plugs where needed
- ☐ Budget for warranty coverage — Limited 5 Year Warranty
You should not buy this product if your vehicle requires a manifold that does not align with the Graywerks 101122 design or if your specific engine variant is not listed as a direct OE replacement.
What These Specifications Let You Do
OEM ECU Monitor Compatibility
The Graywerks 101122 was developed based on OEM ECU monitors to ensure the vehicle’s computer recognizes the exhaust flow as standard. This compatibility allows you to clear the catalytic converter check engine light and keep it off because the internal sensors see the required emission patterns.
Because the Graywerks 101122 aligns and flows like the original unit, you avoid the port mismatches that often trigger error codes. You can rely on the design to maintain a consistent signal to the ECU, preventing the system from flagging the aftermarket part as a failure.
Complete Hardware and Gasket Kit
The Graywerks 101122 includes upper and lower flange gaskets along with lower flange hardware to simplify your purchase. Having these components included means you do not need to source separate seals to ensure a proper fit against the engine block.
The kit also includes heat shields and plugs where needed to protect surrounding components from high temperatures. You can install the Graywerks 101122 knowing the package provides the necessary hardware to secure the manifold and manage heat distribution.
Restored Emission Compliance
Restored emission compliance is achieved through the Graywerks 101122 high grade steel and precious metals construction. These materials ensure the unit maintains the chemical properties required to meet environmental standards while operating under high heat.
The Graywerks 101122 is a direct OE replacement designed to restore emission levels to factory specifications. This allows you to maintain the vehicle’s legality and performance without the power loss associated with standard high-restriction filters.
How the Graywerks 101122 Compares to Alternatives
The Graywerks 101122 provides a direct OE replacement that aligns and flows like the original unit, offering a high-grade steel and precious metals construction.
- The Graywerks 101122 costs $1.64 more than the AutoShack EM775001 Front Exhaust Manifold Catalytic Converter.
- The Graywerks 101122 is the 2nd highest-rated of 4 in this comparison with a 4.5 rating.
- The Graywerks 101122 costs $2.01 less than the US Convertors 516005 Integrated Manifold Catalytic Converter.
- The Graywerks 101122 costs $5 more than the Nissan Altima 2.5L Exhaust Manifold Catalytic Converter.
- The Graywerks 101122 costs $1.01 less than the Manifold Catalytic Converter for Hyundai Santa Fe Sport.
How does the build quality compare to the stock manifold? The Graywerks 101122 uses high-grade steel and precious metals to match the durability of the original equipment. Because the data does not specify the exact material grade, you should confirm the substrate type with the seller to ensure it meets your specific thermal requirements.
If you need the lowest price possible, the Nissan Altima 2.5L Exhaust Manifold Catalytic Converter is the better pick at $152.99.
You can find more details in our full review of the AutoShack Exhaust Manifold Converter.
For owners of a 2.4L model, see how the Camry Catalytic Converter performs.
Graywerks 101122 Buying Questions Answered
Is the ATP Automotive Graywerks 101122 worth the price compared to a generic manifold?
The Graywerks 101122 justifies its $157.99 price point by including upper and lower flange gaskets and lower flange hardware. While a generic manifold might omit these components, this unit provides a direct OE replacement that aligns with original flow and includes heat shields and plugs where needed.
Does the Graywerks 101122 cause any buzzing or rattling sounds under the hood?
The Graywerks 101122 includes integrated heat shields and plugs to secure the assembly. These components are designed to prevent the vibrations and rattling common in aftermarket exhaust manifolds that lack proper mounting hardware.
Will the Graywerks 101122 fit my specific engine?
Yes, the Graywerks 101122 is a vehicle-specific fit type designed to align and flow like the original unit. You must confirm your specific engine block casting matches the OE part number requirements before ordering to ensure the manifold geometry is correct.
Does the Graywerks 101122 clear the check engine light?
Yes, the Graywerks 101122 is developed based on OEM ECU monitors to eliminate catalytic converter check engine lights. It restores emission levels by using high-grade steel and precious metals construction.
To better understand the technical details, see our breakdown of exhaust manifold converter terms and specs.
Is the Graywerks 101122 Right for You?
The Graywerks 101122 suits 5 kinds of buyer and is the wrong choice for 3 jobs, listed below with the reason for each.
Who the Graywerks 101122 is for, and what it does well
Who the Graywerks 101122 suits
- Daily commuters with a check engine light — eliminates catalytic converter check engine light
- Used car buyers looking for reliability — restores emission levels
- DIY mechanics performing basic maintenance — includes upper and lower flange gaskets and hardware
- Budget-conscious vehicle owners — direct OE replacement at a specific price point
- Commuters with high-mileage vehicles — high grade steel and precious metals construction
What the Graywerks 101122 handles well
- Passing an emissions test — restores emission levels
- Fixing a dashboard warning light — eliminates catalytic converter check engine light
- Standard engine repairs — direct OE replacement
- Maintaining factory exhaust flow — aligns and flows like original unit
- Complete manifold installation — includes heat shields and plugs where needed
What the Graywerks 101122 is the wrong choice for
- High-performance racing tuning — direct OE replacement limits power gains
- Off-road heavy-duty hauling — high grade steel is for standard use rather than extreme heavy-duty
- Custom exhaust manifold fabrication — vehicle specific fit type limits universal application
What to budget alongside the Graywerks 101122, and what to skip
Worth buying at the same time
- Vehicle-specific oil — required for engine maintenance during manifold replacement
- Socket wrench set — required to install the included lower flange hardware
- Exhaust lubricant — helps slide the manifold into place during installation
- Torque wrench — necessary to properly secure the included hardware
- Work gloves — required for handling hot components and high grade steel
What you can skip
- Additional flange gaskets — includes upper and lower flange gaskets
- Extra mounting bolts — includes lower flange hardware
- Separate heat shields — includes heat shields and plugs where needed
If this part isn’t suitable, explore the alternatives to an exhaust manifold converter.
Where to Buy the Graywerks 101122
These retailers sell Exhaust Manifold Converter generally – we do not track which of them has this particular model in stock, so check availability and the current price with the retailer before making a trip.
- RockAuto (online only) — extensive catalog breadth and competitive pricing
- Summit Racing Equipment (online only) — specialist performance and aftermarket options
- Amazon (online only) — wide variety of third-party brands
- eBay (online only) — finding specific OE replacements and used parts
- AutoZone (online and physical stores) — local availability and in-store returns
- O’Reilly Auto Parts (online and physical stores) — local availability and in-store returns
- Advance Auto Parts (online and physical stores) — local availability and in-store returns
Final Verdict on the Graywerks 101122
You need a direct OE replacement that restores emission levels and eliminates catalytic converter check engine lights for your specific vehicle. The ATP Automotive Graywerks 101122 is the recommended choice at the $157.99 price point.
The Graywerks 101122 ranks well for reliability, carrying a 4.5 rating from 129 buyers. It ensures the manifold aligns and flows like the original unit while including necessary heat shields and gaskets.
Skip it if: You require a universal fitment rather than a vehicle-specific manifold or need a product with a warranty longer than 5 years.
More Exhaust Manifold Converter explainers and comparisons
- The Exhaust Manifold Catalytic Converters That Work Best for Honda Civic
- Which Exhaust Manifold Catalytic Converter is Best for a Jeep Wrangler?
- Best Exhaust Manifold Catalytic Converters for Hyundai Santa Fe Sport
- Exhaust Manifold Catalytic Converters for Toyota Camry Compared
- Choosing the Best Exhaust Manifold Catalytic Converter for Nissan Altima