The ATP Automotive Graywerks 101122 Exhaust Manifold/Catalytic Converter is a vehicle-specific component designed to replace the original manifold and converter on specific engine configurations. Because this part is a direct OE replacement, it is only compatible with the exact vehicle models and production years specified by the manufacturer’s fitment guide.
Our research into the Graywerks 101122 shows it is engineered to align and flow exactly like the original unit, utilizing high-grade steel and precious metals. This specific exhaust manifold and converter—a heavy metal pipe that cleans engine gases before they exit the vehicle—is designed to eliminate catalytic converter check engine lights and restore emission levels. Because manifold geometry is tied to specific engine block castings, a mismatch in the cylinder head bolt pattern or the turbocharger flange size will result in a failed installation. You must verify your exact production year and sub-model, as manufacturers often change manifold designs mid-year even if the engine block remains the same. We selected this product for our comparison because it includes upper and lower flange gaskets, lower flange hardware, and necessary heat shields or plugs.
What to Check Before Buying the Graywerks 101122
Verifying these technical details ensures the manifold fits your specific engine setup and avoids common installation failures like port mismatches or heat shield interference.
- Confirm your engine’s specific bolt pattern matches the OE requirements to avoid custom drilling of the cylinder head.
- Verify that your turbocharger flange size is compatible with the manifold’s mounting point.
- Check for nearby components to ensure the manifold has enough clearance to prevent melting nearby wiring or plastic shrouds.
- Confirm your vehicle’s production year and sub-model, as “hidden” variations in the same engine block can have different manifold designs.
- Check if your specific setup requires specialized torque specs or high-temp gaskets beyond what is included in the box.
Comparing the Graywerks 101122 to Other Options
The Graywerks 101122 serves buyers who need a direct OE replacement that restores factory emission levels and eliminates specific warning lights. If you require a high-flow ceramic substrate for significant performance gains beyond standard emission restoration, you may want to look at high-flow aftermarket alternatives. Buyers seeking a basic manifold without an integrated converter should look for standalone manifold options instead. For more details on required modifications to your existing exhaust system, see our separate guide on system modifications.
If you own a Honda, you can find the best exhaust manifold catalytic converter for honda civic to improve your vehicle’s performance.
If you need a direct replacement that restores original factory flow and clears emission codes on a specific vehicle model, the Graywerks 101122 is the correct choice for your project.
ATP Automotive Graywerks 101122 Exhaust Manifold
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$157.99 price checked August 2026
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