H&R 70839 25 mm Adjustable Front Sway Bar for 1989-1998 Mazda Miata MX-5 NA

Vehicle Fitment

• 1989-1990 Mazda Miata MX-5 NA Base/SE/LE 1.6 L RWD
• 1991-1993 Mazda Miata MX-5 NA Base/SE/LE/Stow-N-Go 1.8 L RWD
• 1994-1997 Mazda Miata MX-5 NA Base/M Edition/STO 1.8 L RWD

Fitment Notes

• Front adjustable sway bar replaces factory unit; rear bar optional separately
• 25 mm diameter, 2-hole adjustable end links provide tuning flexibility
• Retains OEM mounting--no cutting or drill modifications required

Features

• Crafted from 50CrV4 high-strength spring steel
• Cold-formed, heat-treated, and shot-peened for rigidity and durability
• Forged seamless ends with two adjustment holes for fine-tuning roll stiffness
• Includes maintenance-free urethane/Teflon composite bushings--no lubrication needed
• German-engineered and ISO 9001/TUV certified
• Enhances lateral grip and reduces body roll without sacrificing ride comfort
• Powder-coated finish resists corrosion and wear
• Backed by H&R's lifetime structural warranty

Specifications

• Part Number: 70839
• Bar Diameter: 25 mm
• Adjustment: Front end links, 2-way
• Material: 50CrV4 steel
• Bushings: Urethane/Teflon composite
• Position: Front sway bar only

Included Components

• 1x 25 mm front sway bar
• 2x forged end links (2-hole adjustable)
• 2x urethane bushings and mounting brackets
• Installation instructions and hardware

Product Description

The H&R 70839 Sport Series front sway bar is a direct-fit upgrade for 1989-1998 Mazda Miata MX-5 NA models (1.6 L & 1.8 L), replacing the factory bar with a stiffer, 25 mm adjustable unit. Constructed from German-made 50CrV4 steel, the bar is cold-formed, heat-treated, and shot-peened for durability and a precise ride.

Featuring forged ends with two adjustment holes and maintenance-free urethane/Teflon bushings, the 70839 allows customizable roll stiffness without compromising ride comfort. It bolts directly onto OE mounts--no modifications required--and enhances clarity and grip through corners. Powder-coated finish and lifetime warranty round out this premium handling upgrade for Miata enthusiasts.