Good-Win Racing Mazda Performance Parts

Porterfield R4S -STREET Rear


Performance Street/Autocross

Miata MX5 2006-2015 · Brakes · Pads

Part Number: 61-0334

Application: 2006-2015

Price: $99.00


Porterfield R4S -STREET Rear
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The "S" is for street. These are an old favorite of mine. They work great for street/autocross and light track duty. They dust a bit but the performance is consistent from street temps to about 500 degrees. For more serious race duty try the Porterfield R4.
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First I want to again thank you for working with me on this muffler. I have almost 100 miles on it now, and it has a nice mellow sound. a little Bass, but not too much. A little louder than stock, but not too loud. Plus it is nice inside the car with the top up. I am happy so far I bought this one.

I belong to a local Miata club, and am very active with it. When Spring comes I will tell everyone how much I like the muffler, and how great you are to work with. Maybe I can get some extra business for you.

-- Bill

Good morning Brian, I finally got a chance to put the exhaust on, great advice, it's just loud enough, solid product. I'm running without the baffles, sounds great in power band. Take care, you have all my future upgrade business.........regards.

-- John S.