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HJS Tuning Catalytic Converter | 300-cell 118mm OD x 85mm L (Directional)

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5.00 LBS
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HJS Tuning Catalytic Converter | 300-cell 118mm OD x 85mm L (Directional)


Genuine HJS Tuning catalytic converter cores for replacement/upgrade of restrictive factory cats.  This is an individual catalyst; welding required.                                          


  • CPSI (cells per square inch): 300
  • Diameter: 118mm
  • Duration (length): 85mm
  • Directional: Yes


HJS Tuning

HJS has more than 30 years of experience and expertise in the field of exhaust-gas aftertreatment. For 10 years, we have been engaged in the development, production and marketing of HJS catalysts, downpipes and exhaust systems for tuned passenger cars. We regard ourselves as partners for our customers, who try to do everything to help them to be successful.

Thanks to our innovative technologies, the excellent quality of our products and our customer-oriented approach, we at HJS enjoy a high level of market acceptance. At the same time, we are making an important contribution to protecting mankind and the environment. 

Returns Policy

You may return most new, unopened items within 30 days of delivery for a full refund. We'll also pay the return shipping costs if the return is a result of our error (you received an incorrect or defective item, etc.).

You should expect to receive your refund within four weeks of giving your package to the return shipper, however, in many cases you will receive a refund more quickly. This time period includes the transit time for us to receive your return from the shipper (5 to 10 business days), the time it takes us to process your return once we receive it (3 to 5 business days), and the time it takes your bank to process our refund request (5 to 10 business days).

If you need to return an item, simply login to your account, view the order using the "Complete Orders" link under the My Account menu and click the Return Item(s) button. We'll notify you via e-mail of your refund once we've received and processed the returned item.


We can ship to virtually any address in the world. Note that there are restrictions on some products, and some products cannot be shipped to international destinations.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.