NA / NB Miata Front Bar

Doryoku Race Bar’s philosophy of use & design

We designed this to be the best value bar on the market when it comes to weight, construction, design, add on options, price and total value. All bars are designed by scanning the OEM bumper bar/foam/support so that we can ensure the best fit and follow the existing shape. The race bar is intended to provide many performance benefits for track car applications (drag /road race) while allowing the user to customize the bar as the car & driver grow.

Miata NA (1990-1998) and Miata NB (1999-2005) bumper bar specifications

☆ Utilize 3D modeling design

☆ Designed to close the 1" bumper gap between bumper & OE plastic tub

☆ Designed with 4 bends to disburse impact load

☆ Designed with stronger material that OE plastic tub

☆ 53% (7 lbs.) weight savings over stock (13lbs) 

☆ Opens up 5” clearance between radiator support & bumper

☆ DOM 1.5" 1020 13 gauge steel tube

☆ 10 gauge steel mounting plates

☆ TIG welded construction

☆ Includes matte black powder coating or zinc chromate yellow plating 

☆ $35 flat rate shipping - up to 2 bars (front & rear) 

☆ Legal in Gridlife, NASA, SCCA , Champcar Endurance Racing , WRL Endurance Racing, Luckydog Endurance Racing & more 

 

 

Custom Options

 

☆ Custom powder coating

I stock over 35 popular colors. Powder finishes are available in wrinkle, matte & gloss.   Please note in "Special Instructions" what color you would like.

 

☆ Dual M8 threaded mounting pucks

M8 pucks make it easy to bolt on intercooler brackets, oil coolers, splitter rods, ducting plate, light bar & and more. We have found these general placement of pucks to work well with NA NB Miata: 

Oil cooler :  rear , 7" apart 

Intercooler : top, 16" apart 

Splitter rods : bottom, 20" apart 

Other : air horn, light bar, ducting panels & more, please and note your indented use in special instructions. M8 pucks are placed on the bar based on your setup. Consulting will be provided before fabrication.

 

Engineering Design Notes

☆ Improved handling & balance 

The front bar provides 7lbs of weight savings. When sprung weight is reduced off the tip/nose of the car it will improve handling. Think of the vehicle's weight balance as dynamic and constantly changing based on acceleration, braking, turning, ect. The vehicle's balance is easier to control if weight is closer to the center (not past wheels). The further out the weight is, the range of dynamic balance is greater. 

 

☆ Maximum air flow 

 When using the Doryoku bumper bar, you can cut away the radiator core support which blocks air flow to the top half of the radiator. In force induction application, more room behind the bar allows you to run a larger FMIC.  More room allows you to place FMIC further away from the radiator core and provides more air flow/speed as it passes through FMIC rather than having air flow slow down due to having FMIC & radiator stacked up behind one another.  

 

☆ Increase forward chassis rigidity 

The factory plastic bumper bar connects both frame rails. The steel bumper bar provides much more rigidity over the plastic bumper tub & helps keep the front end square from corner impacts. The steel bar also is stronger & allows for bump drafting / W2W contact. Our bars are proven by W2W racers in Gridlife GLTC, NASA, SCCA, Champcar Endurance Series.