The suspension on your Miata is cantilevered out from the front bulkhead. These braces reinforce the frame horns that support the engine and transfer all of the cornering and road impact loads into the rest of the chassis. This means that you’ll get less flexing and cowl shake, especially when running stiff springs and/or high torque engines.

Frog Arms were the first product that worked along these lines, but they’re no longer available. We took that as an opportunity to improve the design and increase the stiffness without changing the price. We extended the arms further forward and added a third dimension to the shape for maximum rigidity. Clever design keeps the weight to a minimum – only 6 lbs per side.

Simple bolt-on installation. Fits NA and NB Miatas. Powder Coated.  As it sits behind the shock tower brace, it should not adversely affect crumple zone performance.

Instructions available here:

Strong Arm Instructions

The fourth generation Miatas have a weakness in the front subframe where the swaybar mounts.  Mazda has traditionally left this area somewhat weak on many of their vehicles.  They just don't put enough steel there!  This area of the subframe can flex, fatigue, crack, and eventually tear apart as you can see in a couple of the pictures.  We've come up with a simple, elegant solution to the problem.  We've bolted in some very rigid, powder coated steel brackets under the mounts, effectively eliminating the chance for failure.  It's especially important to reinforce this area of the subframe when installing stiffer swaybars or running sticky tires.  100% bolt on, no drilling required.  If you're pairing these with new swaybars, they only take a few extra minutes to install while you already have the car apart!  They add barely over 1 pound to the car.  An inexpensive solution to prevent a very expensive repair!

Click here for the installation instructions...

A complete replacement of the factory door speakers and A-pillar tweeters for your ND Miata.  Similar to our "door-speaker-only" kit, this one includes the same pair of impedance matching woofers, adapter plates, and factory compatible pigtails, but also adds proper, high quality 3/4" silk dome tweeters by Dayton Audio, matching CDT crossovers, and a pair of pre-cut sound deadening panels for installation behind the door cards, good for an additional 3 decibels of output!  It's a complete kit designed to impress with lots of detail and clarity throughout the mix, extended bass response, and the ability to adjust tweeter output to your tastes.  Some harness cutting is required install the kit.  Full instructions and all wiring/connectors/hardware are included.  Specifically designed as a direct replacement for the BOSE equipped cars, this setup can also be used in a non-BOSE car, provided an aftermarket amplifier is used that is 2-ohm stable.  The factory non-BOSE amplifier may not be able to handle the higher current draw of the included CDT 6.7" door speakers.  Rated 100W per channel with high pass filter above 120Hz.

-Click for installation instructions-

The development of our Rallycross coilover package began as the third major offering from Paco Motorsports for offroad and lifted NA/NB Miatas.  First came the simple yet effective 3" lift kit, then came the extreme long travel Offroadster kit.  Both offerings are excellent at what they do, but there was a lot of middle ground untouched.  Some enthusiasts just want a little extra ground clearance on the cheap, and some want as much offroad capability possible.  The Rallycross setup fits squarely in the middle, and is even better than we expected, in terms of versatility on and off road.  Through prototyping and testing, the kit has seen many different iterations of shock design, shock mounting, spring rates, valving, etc.  Specific design intent for this coilover and mounting package followed these three main goals:

1. Max wheel travel allowed by the factory suspension — This means identifying and staying within the safe operating range of motion of the suspension’s upper and lower ball joints, tie rod ends, shock clearance to control arms, rear CV axle maximum angle of operation, etc.

2. Relatively low, progressive wheel rates — This is somewhat contradictory to more traditional street/track coilover packages, which use stiff spring rates to control body roll and aid in quick transitioning of weight transfer. The lower spring rates of the Rallycross setup allow the suspension to move through more of its range, soaking up rough terrain and promoting stability and comfort offroad. As with any quality suspension package, this required plenty of measuring, testing, math, and LOTS of trial and error before we settled on the final specs of all components.

3. Adaptability — We’ve learned so much from our customers over the years about lifted Miatas. Everyone has their own ideas and plans of how they want to take their car off the pavement. Many of our lift kit customers don’t even own a Miata yet. They just love the concept of a lifted Miata so much, they can’t wait to find an old roughed up example to throw some mud/snow tires on and go play offroad somewhere. Some are more serious and want to compete in national Rallycross events or Gambler 500 events, and we have some folks prepping for even higher levels of competition. Whatever the intended use, the Rallycross coilovers were designed to cover a multitude of intended uses.

— TECHNICAL SPECS —

Approx. Ride height range: +1″ to +4″ compared to “stock”

~8.5″ total wheel travel all around (max bump travel could be limited somewhat depending upon large tire diameters interfering with factory wheel well sheet metal. Anything below ~26″ diameter tire should allow full travel.)

Aluminum bodied shocks with 9/16" pistons, threaded spring perches and heavy duty bump stops

Inverted rear shock design allows the high range of travel we achieve, which is traditionally a big limitation in rear shock setups on Miatas.

25"-26" tire diameter without major fender/body modifications. Up to ~29+″ possible with extensive fabrication

--NOTES--

At higher ride heights, front camber adjustments will be limited to around zero camber to +1 degree camber.  Our extended front lower balljoints add up to 3 degrees of negative camber to allow more ideal alignment.  Similarly in the rear, care needs to be taken when using high ride heights and too much negative camber because of the extreme angle of the CV joint at full droop (when the suspension is fully extended downward).  Factory CV joints have been known to break with extreme use.  Stronger axles with beefier CVs and more range of motion are available.  Paco Moto Upper Rear control arms recommended on ALL lifted Miatas for proper camber setup and max CV axle angle limits…also provides for clearance with certain wheel/tire combinations, and more ideal wheel alignment.  Finally, the rear swaybar requires extended links to allow full wheel travel, which we also offer separately.

REQUIRES DRILLING FRONT LOWER CONTROL ARM SHOCK HOLES ON ALL CARS FROM 12mm to 1/2" DIAMETER
NB CARS (1999-2005) REQUIRE ADDITIONAL TRIMMING OF SHOCK TOWER HOLES TO FIT RALLYCROSS MOUNTS...
Click here for installation instructions

This is a DIY or WIY (weld-it-yourself) kit that includes everything needed to make your own pair of our popular Strong Arms for your 1990-2005 Miata -- Just Add Welding and your choice of finish!   This is a perfect opportunity to save a wad of cash while SIGNIFICANTLY improving your Miata's chassis and have a bit of fun with a quick, satisfying project -- maybe to share with someone just as enthusiastic and hands-on as you!

Our Strong Arms were designed from the beginning to be as easy and straightforward to produce as possible.  The design is self-fixturing, meaning you don't need any special jigs or tools to make them accurately.  All the parts only fit together only one way, and are tabbed-and-slotted to be positioned perfectly to carry the chassis loads efficiently between all the bolted hard-points.  The laser-cut steel parts come pre-formed and ready to weld right out of the box.

You need a MiG, TiG, or even a stick welder can work -- and of course you need the skill necessary to weld effectively!  These are a fairly simple product to weld, but they shouldn't be your first experience!  We have a welding guide available, showing where to position each of the 30 welds required per arm.  --THESE SHOULD NOT BE WELDED "SOLID"--  In the guide we outline each weld, which has been strategically positioned and sized to maximize strength, minimize weight, and prevent any warping from too much weld heat.  Click here for the welding guide PDF...

And click here for the instructions to install Strong Arms on your Miata once you're done building the kit.

Our standard prefabricated Strong Arms are powder coated with a slightly textured, black matte powder coat.  Once welded, we recommend some sort of powder coating or durable paint process for best corrosion resistance, but there's nothing wrong with using a few coats of spray paint from a rattle can either, assuming you have that skill too! :)  You could also throw caution to the wind and run them bare.. we don't recommend it, but at least the rust will be hidden behind the fenders!

This kit will come complete with all hardware necessary for installation on your Miata.