The highest quality standards
HP STAGE OPTIONS
From 600hp to 1,500hp. Choose the stage for your performance setup.
Free up horsepower by adding our rollerized forward planet.
BILLET OD PLANET
A must for high horsepower builds, protect your transmission with our billet OD planet.
TRIPLE DISC CONVERTER
Our converters are custom spec'd for each engine and transmission combination.
STREET/RACE VALVE BODY
Choose from our street or race valve body, get the maximum shifting performance.
TOP QUALITY INTERNALS
We only use the best components for each build to handle high horsepower.
Here at A1 with over 55 years of combined transmission building experience you can be reassured we know our shift. Whether you’re needing a simple service or full race proven transmission all of our customers can be comforted knowing they have received the full A1 treatment.