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HKS 2020-2024 Toyota Supra GR Dual Exit Super Turbo Muffler S304 Cat-Back System - 31029-AT003

MSRP: $4,875.00
$3,187.50
(You save $1,687.50 )

SKU:
hks31029-AT003
UPC:
4957266940129
Box Weight:
41.60 LBS
Shipping:
Calculated at Checkout

 Free Shipping On Most Orders Over $99. Within The Continental US. A Signature Will Be REQUIRED For Delivery On All Orders Over $250.00. Exclusions May Apply.  Learn More

HKS 2020-2024 Toyota Supra GR Dual Exit Super Turbo Muffler S304 Cat-Back System - 31029-AT003

Part No.: 31029-AT003 | Available at Just Bolt-On Performance Parts

Enhance the performance, sound, and styling of your 2020–2024 Toyota Supra GR (A90/A91, B58) with the HKS Dual Exit Super Turbo Muffler S304 Cat-Back System. Designed to improve exhaust flow and deliver an aggressive yet refined exhaust note, this premium stainless steel cat-back system offers increased performance while maintaining full compatibility with the stock actuator and control system.


High-Performance Cat-Back Design for Maximum Gains

The HKS Super Turbo Muffler Cat-Back System is built to maximize exhaust efficiency, reducing backpressure and improving turbo response.

Utilizes the stock actuator and exhaust valve control system for seamless operation
Engineered specifically for the B58-powered Supra RZ without OPF
Larger diameter piping enhances exhaust flow and power output

With HKS' expertise in turbocharged performance, this system optimizes power delivery while providing a deeper, more refined exhaust tone.


Aggressive Yet Refined Exhaust Note

The HKS Super Turbo Muffler Cat-Back System enhances the acoustic presence of the Supra’s B58 engine while minimizing unwanted drone.

Louder and more aggressive than stock (87dB vs. 85dB)
Deep, sporty exhaust tone with refined sound control
Resonators strategically placed to balance performance and comfort

This exhaust system delivers an exhilarating tone under acceleration while maintaining a comfortable driving experience for long-distance cruising.


Premium S304 Stainless Steel Construction

Built from high-quality S304 stainless steel, this system ensures exceptional durability and resistance to corrosion, making it ideal for both street and track use.

  • Mandrel-bent tubing for maximum airflow and efficiency
  • Polished 110mm dual exhaust tips provide a race-inspired aesthetic
  • Precision welds and high-flow design for consistent performance gains

This high-quality exhaust system is the perfect balance between aggressive styling, performance, and daily drivability.


Optimized Exhaust Flow for Performance Gains

The HKS Dual Exit Super Turbo Muffler Cat-Back System is designed for optimal exhaust velocity, reducing turbulence and improving throttle response.

Center Pipe Diameter: 85mm – 70mm x 2
Exhaust Tip Diameter: 110mm (L&R Dual Exit)
Reduced backpressure improves turbo spool and acceleration

With increased airflow and reduced restriction, this cat-back system enhances mid-range torque and high-rpm power, making the Supra feel stronger and more responsive.


Direct Bolt-On Installation for OEM-Like Fitment

The HKS Dual Exit Super Turbo Muffler Cat-Back System is engineered for easy installation, ensuring a perfect fit without modification.

Direct bolt-on replacement using factory mounting points
Compatible with stock exhaust valve actuator for OEM functionality
Works with factory suspension and most aftermarket setups

Designed for seamless integration, this cat-back system is an excellent choice for enthusiasts looking for a high-performance upgrade without unnecessary complexity.


Fitment & Compatibility

  • Vehicle Compatibility:
    • 2020–2024 Toyota Supra GR (A90/A91, B58 3.0L Turbo I6)
  • Part No.: 31029-AT003
  • Exhaust Type: HKS Super Turbo Muffler (SSR) Dual Exit Cat-Back System
  • Material: S304 Stainless Steel
  • Designed for RZ models without OPF

Why Choose the HKS Dual Exit Super Turbo Muffler Cat-Back System?

Optimized for increased exhaust flow and turbo response
Aggressive yet refined exhaust tone with minimal drone
High-quality stainless steel construction for durability and performance
Large-diameter 110mm tips for a bold, motorsport-inspired look
Direct bolt-on fitment using OEM mounting points


Upgrade Your Supra’s Exhaust System with HKS Performance

For Supra GR A90/A91 owners looking to enhance power, sound, and aesthetics, the HKS Dual Exit Super Turbo Muffler S304 Cat-Back System (31029-AT003) is the ultimate exhaust upgrade. With proven performance gains, premium build quality, and an aggressive sound profile, this system is the perfect addition to your high-performance Supra build.

Find yours today at Just Bolt-On Performance Parts and experience HKS performance and sound like never before!

Shipping & Returns

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HOW TO RETURN AN ORDER

To return an order, please contact us HERE, with detailed information regarding the return. We can only accept items that are in new condition and have never been installed. We cannot accept any used, previously installed, or damaged items. If an item is sent back to us used, previously installed and/or damaged, it is now the property of Just Bolt-On Performance Parts and no refund will be issued. All returns must include the provided Return Merchandise Authorization (RMA) form or RGA number, to help expedite the return process. We will then provide the Return Shipping Address for the return. Pictures of the parts being returned are also required. All returns are subject to a 20% Restocking Fee of the original purchase price. Some orders cannot be return – see the list of non-returnable orders below. 

RETURN POLICY

The buyer has 30 days from original purchase to initiate a return RMA and forward tracking information to us. No refund will be given for products that arrive after the 30 days from the original purchase date. Tracking information is required for all returns. When shipping an item back to us, we recommend that you use UPS, FedEx or any other carrier that offers signature confirmation and insurance, as we are not responsible for lost or damaged packages. Only the signature of an Just Bolt-On Performance Parts employee will suffice as proof of delivery. The customer agrees to bear all shipping and insurance charges, and all risk of loss during return shipment. If an order is refused “Returned to Sender”, no refund will be issued. Buyer is responsible for all return shipping charges.

We will not accept a return of an item that is damaged or defective if it has been used/installed, please inspect all orders as soon as you receive them and contact us HERE within 72 hours. If the order is damaged during shipment, Just Bolt-On Performance Parts will replace the item free of charge. 

When you purchase items that qualify for a promotional offer such as Buy "X" number of items, Get "X" number of items free, the discount reflecting the price of the lowest-priced item is proportionally applied to each eligible item. If any item is returned, the refund will be equal to the original price of the item reduced by the proportional discounted amount.

RECEIVED DAMAGED ORDER

We try our best to prevent damage to all packages during transit by packing each order carefully. From time to time, though, damage will occur despite our precautions.  If you receive an item that has been damaged in shipping, please call us within 72 hours of receipt and we will set up a claim for the product. Once this claim has been processed by the courier, we will reach out to you to return the product and send out a replacement.

We may request pictures to further assist with the completion of the claim.

The courier will reach out to you after the claim has been filed over the phone; please provide a reliable contact number when setting up your damage claim.

DEFECTIVE PRODUCTS

If you receive a defective product, please contact us within 72 hours, and we will process your return or replacement free of shipping charge. Contact us HERE to process your return.

In the event of a defect that occurs outside our return policy, but within the manufacturer warranty, please contact the manufacturer directly to process your return. The manufacturer will have sole determination of the outcome of the claim. As a courtesy to our customers, Just Bolt-On Performance Parts will be happy to try to facilitate a thorough review of the claim, but we have no final say in the decision made by the manufacturer (i.e. approvals, denials, fees, etc.).

Just Bolt-On Performance Parts is not responsible for any labor costs which occur as the result of the installation of wrong or defective parts.

NON-RETURNABLE ORDERS

Returns will not be given for the following items:

·       Just Bolt-On Performance Parts gift cards.

·       Any products sold as "Open Box". 

·       Non-defective used or installed items.

·       Wheels that have already been mounted and balance. This includes wheels packages from Just Bolt-On Performance Parts.

·       All special orders, custom, and/or built to order parts. This includes but not limited to, Weld Offroad, Addictive Desert Design, Rigid Industries, Please contact us prior with any questions. 

·       All electronics including but not limited to handheld devices and chargers.

·       Batteries, fluids, lubricants and all maintenance products.

·       All orders that required freight delivery.

·       International orders that shipped outside of the United States.

REFUNDS

Once the return is received, please allow 5-7 business days for the refund to be issued. All items included in the return are fully inspected by our Returns Department prior to issuing a refund. All refunds will be issued to the original payment method. Allow 3-5 business days for the refund to settle back to the original payment method. The original shipping and handling charges are non-refundable. Processing time will vary, depending on your financial institution. 


NEED TO CANCEL

We strongly suggest you call us at 1-844-526-2658 as soon as possible after placing your order if you need to change or cancel it, as orders are processed within minutes!  If you email us, we may not receive them in time to stop the order from shipping out.  Please double-check that your order details are correct before submitting your order during checkout.

An order that has already received tracking information and/or shipped cannot be canceled.  If an order has been assigned a tracking number but the tracking information has not updated, this does not mean the order has not shipped. Please contact us HERE to set up a Return Merchandise Authorization (RMA) once your order has been received.

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