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2017 Mazda MX-5 RF
The all new Mazda MX-5 RF (Retractacble Fastback) was announced at the New York Autoshow last week and stole the show! Featuring an all new fastback design the RF is the highly anticipated successor to the NC's PRHT. Join the conversation on our Facebook and tell us what YOU think of the new Retractable Fastback MX-5!


Already have an ND? Don't get left out on all the fun! 

All of our ND mufflers use new finely-tuned Helmholtz chamber technology to cancel out the 'boomy' droning frequencies so you get maximum fun without the negative side effects of typical aftermarket mufflers! All versions are in stock and shipping now:


Our mildest choice, on gas or off it is deeper and more throaty than stock and just a little more volume than stock. Also likely the best choice for those who later add header and/or midpipe that will raise the sound more. If the wife is going to object to anything too sporty, this is your choice!

Hear it:


Same overall design as the "Race" but upgraded with fancy tip for more full finished look and high density resonator to lower the volume. It's otherwise the same design and same melodic burble sounds when you put your foot to the floor, except it turns down the volume dial from 10 to about 7.

Hear it:




The MOST aggressive, minimal weight, minimalist look, not for everyone, will attract attention! Certainly the most fun for those not worried about sneaking out of the neighborhood early in the morning without waking the neighbors.

Hear it:


Big thanks to San Diego Miata Club Member Mark Booth for these videos!
Replacement Hubs

Don't be fooled by inexpensive hub replacements from your local parts store! Quality hubs are crucial to maximizing your fun at the track and keeping you out of the pits with a wrench in your hand. 

For the 1990-2005 Mazda Miata, Centric hubs have the same made in Japan, NTN bearings, as OEM Mazda hubs. Centric h ubs also ship with ABS rings pre-installed and are easily removed for non-ABS cars. Don't forget ARP extended wheel studs if you plan on running a spacer more than 3mm!

For our 2006-2015 Mazda MX-5 customers racing with WIDE sticky tires, upgrade your front MX5 hubs to these factory 2009+ RX8 hubs for improved safety and durability! These are much more robust than your factory MX5 hubs because they were designed for the heavier four door RX8, but they are plug and play. They bolt right up to the MX5 because your MX5 is a shortened RX8 platform. We use these on our track MX5 and so should you.

1990-2005 Mazda Miata ARP Extended Wheel Studs

Want to run a spacer larger than 3mm on the track? Need to replace your crusty wheel studs with 200,000 miles? Look no further than our ARP extended wheel studs. 

With a tensile strength of 190,000 psi, these heat-treated, cadmium-plated 8740 chrome moly wheel studs are a necessity for any car in competitive racing. They easily handle tremendous acceleration shock loads (shear) and lateral forces (elongation).


Running aftermarket replacement rear hub flanges? Dorman 930-550 hub flanges, a common aftermarket replacement, h ave a DIFFERENT knurl diameter wheel studs. Before ordering, verify the knurl diameter of the studs pre-installed in your aftermarket hubs. If you have OEM rear hub flanges from Mazda, do not order these!  


The complete replacement clutch line from Techna Fit replaces hard line on the firewall, the soft line and the curly-q line above the slave cylinder. This provides a straight shot from your clutch master to clutch slave!
Benefits of removing the coiled hard line include more room near the slave cylinder for servicing, easier removal of transmission or motor from the car and a quicker bleeding process.

BIG Shipment of Mazda Competition parts just arrived!


Mazda Competition Control Arm Bushings
These bushings are quiet just like the factory bushings, but slightly stiffer for better performance. We now have these bundled into packages, with a total savings of $20 over the individual prices. No need to worry about part numbers and quantities, just one-click gets you bushings for the all the control arms in the front or rear of the car:




40% stiffer than standard motor mounts, but not so stiff that it adds vibrations and rattles
like our race engine mounts. If you do any form of performance driving and you can't remember the last time you changed your engine mounts, you probably need new ones.

Enkei RPF1

The best combination of strength, light weight, and quality manufacturing. Our old favorites with a classic design that always look fresh.

Almost every size/offset is on sale right now! With so many great options it can be overwhelming to sort through all the wheel sizes/specs, so here is a complete list of all our RPF1s for you!

NOTE Enkei only makes Bronze, Gold, and SBC (Special Brilliant Coating) in special order batches. There are no current plans for new batches of these, and we are getting LOW! Get them before they are history.

4x100 Lug Pattern

15x8  +28mm Silver ,  +28mm Black+28mm SBC ( Limited Quantities Available )
16x8  +38mm Silver

5x114 Lug Patten

17x8.5  +40mm Silver
17x9.5  +38mm Silver
17x10  +38mm Silver 
18X7.5  +48MM SBC
18x9.5  +45mm Silver ,  +45mm Black
18x10  +38mm Silver
18x10.5  +15mm Silver



Don't miss out on the next round of the Extreme Speed Roadster Cup at Willow Springs International Raceway (Big Willow) on April 17th!

Good-Win Racing | 858-775-2810 | www.good-win-racing.com
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