Weapons Grade Performance

Welcome to Weapons Grade Performance!


We are the Northeast’s newest High Performance Automotive Performance Shop.  Our new facility in Wallingford, Connecticut houses all new tools, equipment, and a State of The Art AWD Mustang Dyno.

Our Mission is to Build, Test, and Tune the Highest Quality, Most Reliable, Cost Effective, Fastest cars in New England.

We specialize in the Modification and Performance Enhancement of the:

Nissan GT-R

Subaru WRX and STi

Mitsubishi Evolution

Ford Mustang and GT

Chevrolet Covette and Camaro

Our shop is also an experienced kit car builder for the Factory Five Cobra and GTM Supercar.