Good-Win Racing Mazda Performance Parts

Goodwin Racing ND Ultralight Front 4 Piston Caliper Upgrade


Miata MX5 2016-2017 · Brakes · Brake Kits and Complete Packages

Part Number: 61-1721

Application: 2016-2017

Price: $549.00

Caliper Color


Goodwin Racing ND Ultralight Front 4 Piston Caliper Upgrade
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Get Four Piston High Tech Aluminum Caliper performance on your ND Gen Miata with a MUCH lower price tag, even lower weight for better ride quality, and better replacement costs! Fits over your factory 11" front rotors! Better wheel clearance than factory AND Brembo calipers.

RIGID and ultra light 4-piston caliper for improved braking response over the standard single piston OEM brake calipers, reduced unsprung mass, wider pad selection, better looks and MORE FUN.

Not all fancy red calipers are the same, piston size, pad size, and more all affect performance and longevity. Our caliper choice was made with great care to retain the superb braking balance.

Utilizes a Wilwood 4 piston caliper that is 4.7 lbs lighter than the factory caliper per corner (including brake pads). Additionally, our kit is more than 3 pounds lighter than the factory Brembo calipers. Combine this kit with our 2-piece drop-in replacement rotors and save over 8 lbs per corner for a massive improvement in ride quality (particularly nice benefit for those upgrading to stiffer suspensions for better handling).

GWR Exclusive
Our kit uses our own brackets designed in-house, CNC machined from the highest grade aluminum with steel thread inserts. These brackets are designed for superior strength and rigidity and feature our signature hard anodizing.

Our stainless steel braided lines are included as standard and they are the most durable and heavy duty lines on the market, custom made for us and featuring DOT fittings. Made to fit (too many competitors use general purpose lines to save cost and include lots of extra connectors to 'make it work' with the unnecessary risk of fluid leaks).

Upgrading your ND with our caliper package gives you access to the wide and familiar selection of performance brake pads that we have decades of experience with! Replacement pad costs for these calipers are also far more affordable than for the factory calipers. Kit includes BP20 pads which are great for street/light performance use and match very well with factory pads in the rear. If you would like to swap to a different pad for more aggressive use, just shoot us an email!

Comprehensive kit includes:
* Dynapro 4 piston calipers
* Mounting Brackets
* Stainless Steel brake lines
* All mounting hardware
* BP20 Street Performance Brake pads
* Wilwood high-temp brake fluid

Fitment Notes
YES you can fit a 15" wheel at the FRONT over this kit (which you cannot do with stock brakes). Fits all aftermarket 16" and 17" wheels that we sell here. Fits factory 17" BBS wheels with no spacer (those are made to clear multi piston optional Brembo calipers) and fits standard factory 17x7 wheels with slim 3mm spacer we include in the kit.

BRIAN's APPLICATION NOTES: From the picture below you can quickly see that Mazda believes that a caliper upgrade on this platform includes BIGGER pads with the optional Brembo pad at 8.1 square inches versus the standard front OEM at 6.2 inch area pads. We agree with Mazda that size does matter here, which is why we go bigger than stock with both our four and six piston choices! Our four piston choice is 6.4 square inches vs 6.2 for stock pads, and our Six Piston upgrade with 7.3 square inches is nearly 20% more area than stock pads and the best aftermarket analogy for what Mazda does with the Brembo option. More performance comes with bigger pads and pad life is also dependent on pad size. We include the tiny Powerlite Caliper pad at the top of the picture below because we are aware a competitor offers that little caliper as their 'upgrade' and we think you should see up front how that caliper's pad size is nearly 20% smaller than even standard factory ND front pads, and dwarfed by the pad size Mazda offers in the Brembo Calipers. So if you want the best aftermarket four piston conversion, it is our kit. And if you want to best match what the factory offers with the BIG BREMBO option see our SIX PISTON Caliper conversions.

Dust Boots
We occasionally get a call from someone asking if these calipers have dust boot seals because the factory calipers have them and so they assume this is a feature they need to be concerned about. Wilwood brake calipers, just like all racing brake calipers, do not use dust boots to seal the caliper pistons. This is intentional and done for several reasons, including the point that rubber dust boots can catch fire under extreme brake heat. The pistons fit tightly into the caliper so they seal without the need for rubber seals. In our decades of experience with thousands of Wilwood calipers this design has proven itself completely reliable. These calipers are suitable for road use in all climates and conditions as well as on the race track. 

*** Product images may differ from actual product appearance ***


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.

Hi Brian, I just bought a heatshield and a cruise control relocation bracket for my '95 Miata from you. It is in the mail now. Thanks for such fast service. (My cruise is just wrapped up in a microfiber shoprag at this time!)

-- Bob