NEW PRODUCT - Subaru WRX / STI Billet Mount Kit (w/ Lithium Battery)

Enthusiasts know that in the Racing and Competitive Street/Strip marketplace, winning races can come down to fractions of seconds, inches, and ounces.


Valkyrie Engineering drop-in CNC Machined Billet Battery Mounting Kit paired with an Antigravity ATX20 RE-START Lithium Battery, developed for the Subaru WRX and STI, in tandem with feedback from our partners at Antigravity.


⚡️Innovative Billet Battery Mounting Kit

⚡️Kit Includes Antigravity ATX20 RE-START Lithium Battery

⚡️Integrated High-Temp Ceramic Coated Heat Shield 

⚡️Up to 80% Lighter Than Stock

⚡️680 CA / 10 AH

⚡️2x Lifespan of Lead-Acid Battery

⚡️Made in Indianapolis, IN U.S.A.

⚡️Kit weight 6lbs*

⚡️Patent Pending


*6lbs applies to uninstalled Universal Mounting Kit. Additional hardware may increase weight. Fitment weights may vary.



MSRP: $319.99 (included in kit)

Model: Antigravity ATX20 RE-START Lithium Battery

Dimensions (standard): 6.89 x 3.4 x 5.12 inches (LxWxH)

Weight: 3.8lbs

Capabilities: 680ca / 20ah (Pb Eq) / 10ah (Actual)

Safest Battery Technology using full BMS and Lifepo4 Lithium chemistry



⚡️For replacement of all OEM Lead/Acid Batteries of the same size.

⚡️Excellent for everyday use in bikes up to 2200cc.

⚡️Great for extra-large, high-performance V-Twin motors.

⚡️Ideal for use in Race Cars of all types, including large V-8 Racing Motors up to 700 Horsepower.

⚡️Not for use with PWC (personal watercraft).