Ultimate Racing

Ultimate Racing High-Flow Ceramic Cat | 2003-2006 Mitsubishi Evo VIII-IX (200031)

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Phone 1-888-627-3736

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Your Model
Pipe Size | Cat Style
Extra Wideband Bung

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2003-2006 Mitsubishi Evo 8/9 High Flow Ceramic Cat by Ultimate Racing 

This is a high-flow cat pipe designed for the Mitsubishi Evolution 8 & 9. The piping is constructed of quality 304SS and features a ceramic 400 cell count high-flow cat, efficient to 450hp. This is a direct bolt-on replacement. Bolts on to stock (2.5" version), or most aftermarket exhaust (3" version). Hardware is included.


  • 304 Stainless Steel Piping
  • Ceramic High-Flow Cat Efficient to 450 hp
  • 400 cell count
  • Direct Bolt-On Replacement for Catalytic Converter
  • Comes with O2 sensor bung for factory O2 sensor (Evo 9 version, including Euro Spec)
  • Extra Wideband Bung/Plug available for aftermarket wideband gauge (for custom tuning)
  • 100% bolt on to stock (2.5" version) and most aftermarket exhaust (3" version)
  • Hardware included in every purchase

Please Note: This photo is generic and may not accurately represent the product you receive.


  • 2003-2005 Mitsubishi Evolution 8
  • 2006 Mitsubishi Evolution 9

What's In The Box?

  • 1 - High Flow Ceramic Cat
  • Necessary Hardware


  • Ultimate Racing 5-Year Warranty

Customer Reviews

Based on 9 reviews
Ivan Quintana
Great item

I got this so I could pass emission on my Evo 9 it had a trst pipe so I needed a cat it has a tune on it with bigger injecters and is runnimg rich but even so the cat let me pass wounderfull lie and I don't feel any loss in power compared to the test pipe as well before the o2 sensor broke because it was hitting the body of the car but with the new cat it now doesn't it hit and has way more room great product only thing is it did take 9 business days to get to me

5 stars!

I gave 2 stars on my first review and I would like to take that back! I thought the cat was rattling only after two weeks of use but when I took it out I found a nut inside which is what causing the rattles. I have no idea it got in there. It does not seem to have come from the cat because the honeycomb and everything inside is intact. Whatever it was, I am happy that I found out about it and it isn’t because the cat got faulty. I should not have rated it 2 stars without checking the issue first. Clearly a fault on my side. Anyway, I’m glad I got this sorted out and I’m loving this product. Exhaust has toned down a bit which is just what I expect it to be. Good quality and build!

Edwin Villalta
Great fitment reasonable price

Bought the Ultimate Racing hi-flow cat great fitment and reasonable price. Bolted up perfect.

Victor A Carrillo
High flow cat

I got tired of the fumes from having no CAT on the car so I decided to buy a high flow cat that looked stock and a 3" , looked around and found this one that had what i was looking for so I bought it and once I received it it looked amazing in quality and the price wasn't too bad, it took two weeks to get here cause I guess it ships from Canada but I didn't mind it, the only thing that didn't fit was the hardware it comes with cause it about half and inch too short to bolt up, other then that it fit perfect and it did quiet down my car a little bit which is a plus for me

Ultimate racing high flow cat

Exactly what I wanted and the fitment was perfect! Thank you Maperformance