SRM Corvette C8 High-Flow Catalytic Converters (300-Cell)
The factory C8 exhaust system is a masterpiece of engineering, but it's held back by heavy, restrictive ceramic catalytic converters. Our 300-Cell High-Flow Catalytic Converters are designed to let your mid-engine beast breathe, delivering a deeper, more exotic exhaust note and measurable gains in horsepower and torque—all without the "gas station smell" of cat-less pipes.
HIGHLIGHTS
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Part:
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High-Flow Catalytic Converters
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Fitment:
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Chevrolet Corvette C8 2020 2021 2022 2023 2024 2025 2026 (Stingray / Z51 / Z06)
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Location:
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Lower Rear
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Material:
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T304 Stainless Steel
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Cell Density:
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300 CPSI (Cells Per Square Inch)
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Substrate:
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High-Temperature Metallic Foil
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Product Fit:
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Direct Fit. Not OEM Replacement Product.
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Warranty & Returns Policy:
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Check out our Return Policy for more details.
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Quantity Sold:
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Installation:
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Direct Bolt-On
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Key Features
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Optimal Flow Dynamics: The 300-cell metallic substrate offers a significant reduction in backpressure compared to the dense factory 600-cell units.
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T304 Stainless Steel Construction: Built to withstand the extreme heat of the C8’s engine bay. Precision TIG-welded for maximum strength and a lifetime of performance.
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The "Perfect" Sound: Expect a crisper, more mechanical roar at wide-open throttle, while maintaining a refined, drone-free cabin experience during highway cruising.
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Direct Bolt-On Fitment: Designed as a 1:1 replacement for the OEM converters. Reuses factory mounting points and O2 sensor locations.
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Heat Management: Integrated heat shielding ensures your engine bay temperatures stay within safe operating limits.
Why 300-Cell?
While many competitors use 200-cell cores that often trigger "Catalyst Efficiency" codes, our 300-cell substrate provides the ideal surface area for exhaust scrubbing. This maximizes your chances of maintaining a CEL-free dash while still achieving the high-velocity airflow required for performance driving.
The "Full Bolt-On" Combo: Why Pair Both?
While either part is a great upgrade, running our 300-Cell High-Flow Cats with the Muffler Delete Catback creates the ultimate performance synergy:
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The "Stage 2" Power Jump: Combining these unlocks the most restricted areas of the LT2 engine. You’re looking at an estimated gain of 20–25 WHP and a massive increase in mid-range torque.
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No Drone, All Tone: The 300-cell cats act as a natural resonator. While a "cat-less" muffler delete can sound raspy or "tinny," the 300-cell substrate keeps the note deep, crisp, and high-end.
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Massive Weight Reduction: By deleting the bulky OEM muffler assembly, you shave roughly 20+ lbs off the rear of the car—improving the C8's already legendary center of gravity.
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Maximum Scavenging: Featuring a precision-engineered X-Pipe design, this system balances exhaust pulses between cylinder banks, increasing flow velocity and adding that high-pitched, exotic "scream" at high RPM.
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T304 Stainless Steel: Fully mandrel-bent 3.0" tubing ensures zero restrictions and a lifetime of corrosion resistance.
RETURN POLICY
THERE ARE 2 KINDS OF RETURN CASES
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WHAT KIND OF RETURN CAN BE RECOGNIZED AS NON-DEFECTIVE RETURN?
Superautousa ships out right product as product link displayed, and customer want to return:
Customers order wrong product for their car
Customers don’t like the product on personal reason
Customers request return after using or installing the product
Incorrect or mistakenly installation of a product
IMPORTANT NOTICE FOR NON-DEFECTIVE RETURN
If a customer received the wrong product, the customer needs to send an email to info@superautousa.com in 30 days of the item delivery; Otherwise, no return & replacement/refund will be provided from Superautousa.
If a customer received a damaged product, the customer needs to send an email to info@superautousa.com in 72 Hours of the item delivery. Otherwise, no return/replacement/refund will be provided from Superautousa.
Return items must be in the original package box, the products need to be in unused & good condition(in the same condition that you received it). Customers need to send pictures of the shipping labels on the package and the pictures of the product in full view to confirm the condition.
Return address will be provided by Superautousa after non-defective return authorized.
There will be a restocking fee (20% of the order's original purchase price) deducted from the refund for non-defective return.
If Superautousa receives the return item in damaged condition, there will be 50% of the order amount deducted from the refund, we highly recommend customers to purchase package protection/insurance.
IF THE RETURN IS CAUSED BY THE CONSUMER (NON-DEFECTIVE RETURN), CONSUMERS ARE RESPONSIBLE FOR THE SHIPPING FEE. THE SPECIFIC FEE SHOULD BE BASED ON THE EXPRESS COMPANY YOU CHOOSE.
WHAT KIND OF RETURN IS DUE Superautousa?
Superautousa sends the wrong product which is different from the product customer ordered, Superautousa will provide the correct product according to customers’ intention.
Customers receive damaged products, Superautousa will provide replacements.
Customers receive a product that's missing contents, Superautousa will provide replacements.
IMPORTANT NOTICE FOR ALL RETURN/REFUND REQUEST
Customers need to send an email to info@superautousa.com in 30 days of the item delivery; Otherwise, no return & replacement/refund will be provided from Superautousa.
If a customer received a damaged product, the customer needs to send an email to info@superautousa.com in 72 Hours of delivery. Otherwise, no return/replacement/refund will be provided from Superautousa.
Customers need to feedback the product quality/defective issue once they receive it in 72 Hours. If customer feedback the item issue after installation, this kind of request is not acceptable, Superautousa won't provide return and refund on that order.
Customer need to send pictures in emails, Superautousa will recognize the return reason/confirm the issue（Please send the fitment issue with the required pictures/informations within 10 days after Superautousa send you email to require that/tips as suggested, otherwise the return request will be closed on our end）
Email content include:
- Return Reason
- Detail information of your car and pictures of the car (for fitment issue confirmation)
- Pictures of the fitment issue area, and full test install (for fitment issue confirmation)
- Pictures of the front look and back view of the products in full view(product condition confirmation)
- Pictures of the all shipping labels in the package box
- Picture of damage area of the product (If damaged product received)
Return package without authorization by Superautousa is not acceptable, no replacement or refund will be provided for unauthorized return. Thank you for your understanding!
Orders which have been shipped out and still in transit/shipment cannot be canceled, returned or refunded. Customers need to apply for the return or refund after they receive the products.
For customers with shipping protection, please keep All Packaging and Damaged Goods When filing a claim, keep all packaging and the damaged goods as they were received, as photographs may be required for claims processing. Do not dispose of any shipment materials or goods before the claim is complete.
Exchanges
If a customer wishes to exchange for another item, the customer needs to contact info@superautousa.com to request for the exchange. The customer needs to pay for the price difference (if apply) and pay for the shipping cost. Superautousa will refund the price difference (if apply) once the exchange request is accepted.
Order Cancellation
If cancel reason is on Superautousa, we will provide a full refund. The refund is expected to be received in 5 to 7 business days upon notifying.
Superautousa accepts all cancellations before fulfillment.
Orders which have been shipped out cannot be canceled, please check if you need to apply the return.
Shipping Fee& Package Shipping Insurance Fee is not refundable.
Refunds
We will notify you once we’ve received and inspected your return, and let you know if the refund was approved. If the product is returned in damaged, used or defective condition, a 50% restocking fee will apply. If the reason for returning is not due Superautousa, a 20% restocking fee will apply. If none of the above conditions apply, you will receive a full refund. Please remember it can take some time for your bank or credit card company to process and post the refund too.
If you have not received your refund for more than 15 business days after we’ve approved your return, please contact us at info@superautousa.com.
