Good-Win Racing Mazda Performance Parts
NEW 15x7, 15x8, and 15x9 Konig 'Dial-In' Flow Formed wheels

NEW 15x7, 15x8, and 15x9 Konig 'Dial-In' Flow Formed wheels! Flow formed for incredible strength and lightness, a load rating of 550KG with a weight of just 13 pounds for the 15x9 size, 12 pounds for 15x8 and 11 pounds for 15x7. Clearance for Big Brake Kits! Colors include Matte Black and Grey.


Welcome to Good-Win Racing!

Street, Autocross and Track Performance for your Mazda Miata, MX5, MX5ND, Mazda RX8, Mazda RX7, Mazda 3, Mazda 2, Mazda 6 and CX5.

Why Zoom with Mazda parts from Good-Win Racing?

Because we race what we sell, and we share our expertise with you!

When our competition goes home for the weekend, we go racing and driving in our Mazda! Using the Mazda parts we sell, under both street performance and race conditions, gives us a unique experience on what works, and what doesn't.

From shock absorbers, replacement convertible tops, and shift knobs, to exhausts, intakes, springs, and alloy wheels, we can help you select the right combination of Mazda parts.

You can also join our Mazda Forums for more information about specific parts and cars, as well as development of our current project cars. And don't miss our forum wheel gallery to see what those wheels you are considering actually look like on your Mazda before you buy.

Quarterly Tech Days at 696 Naples Street, Chula Vista. Food, Fun, Installs!

Check the forum for more information.

Good-Win Racing Tech Day 1
Local Miata racer Howard K. put on the weight reduction clinic at our first Tech Day.

Can't find a specific part in our online catalog?

Just give our Mazda parts experts a call at 858-775-2810 or drop us an email from the Contact Us page.

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REVIEWS

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

After reading many other positive reviews on both the GWR and Miata forums I finally decided to buy this product. My main concern for many months was whether or not I was up to the task of installing the header. But with the excellent instructions on Brian's forum as well as several Miata forum threads it turned out easier than I expected. After receiving notice that the header would arrive on a Friday afternoon, I began the disassembly process. After about 3 hours I had the stock manifold out. Later that afternoon the new catted header arrived right on schedule. And it is a thing of beauty. I opted for the stainless version. Installation on Saturday morning took another 3 hours, although I could have shaved some time off of that but I was actually enjoying the process of double checking torque values and cleaning up my engine compartment. I already have the GWR catted midpipe, so that connection was a snap. I put everything back together, reconnected my battery, and went for a drive. NO CODES! Nice throaty sound with my RSII muffler, and a significant boost in power and low/mid torque. Another happy camper here. I since have added a M-E tune and I feel I have realized all of the gains that Brian has achieved on his 2012 project Miata. I've put several hundred miles on my Miata since the install with zero problems. This is the car that Mazda should have built all along. Thanks Brian.

-- Ron P.

Your Mazda Product Videos!

If we use your video on the site, we will give you a $20 dollar gift certificate toward your next purchase.

    To Qualify:
  1. Post your video to YouTube.
  2. Include full product name and link to GWR website in video description.
  3. Contact us with the link.

$20 Good-Win
Gift Certificate

CA PROP 65 Warning

VIDEO

See Our New GoPro and DashWare In Action!

VIDEO

Sea of Cones : A Documentary About Autocross