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Circle D 6L80 transmission upgrades and rebuild kits are some of our most sought-after products. Customers know that when they order 6L80 performance parts from Circle D, they get the best possible parts from a business that doesn't just market high-performance transmissions but has a true passion for performance applications and what they do. We don't sell anything that we wouldn't put in our own cars!
Circle D has been a leader in the transmission industry since 1976, specializing in GM and Ford rear-wheel drive high-performance transmissions. We stay at the forefront of our industry by ensuring our parts and performance applications stay up with the latest technology, research, and developments in transmission upgrades.
We entered the parts business after we purchased a Gen 5 Camaro for research and development on the 6L80 transmission for performance purposes. Our team’s goal was to transform the factory transmission to allow it to handle today’s horsepower revolution. Along the way, we received countless requests from other horsepower junkies asking about purchasing Circle D Transmission’s revolutionary performance kits for the 6L80.
Our performance parts retail service allows us to offer customers everywhere the same high-quality 6L80 rebuild kits and performance parts that we use for our local customers. As a small, family-owned business, we’re thrilled to know that our transmission rebuild kits and parts are being used throughout the United States and even around the globe.
6L80 transmission parts upgrades are easiest with one of our 6L80 transmission rebuild kits. Circle D Level 2 6L80 performance transmission upgrade kits are rated up to 550 RWHP, Level 3 6L80 performance transmission rebuild kits are rated up to 750 RWHP, and Level 4 6L80 performance transmission rebuild kits are rated up to 1000 RWHP. Each kit comes with detailed instructions from our team of experts and free UPS domestic ground shipping.
Other options for 6L80 upgrades include heavy-duty 4-5-6 billet shafts and hubs, HTSR billet-reinforced output carriers, complete clutch modules, clutch kits, bearing kits, pressure switch installation tool kits, and the 2014 and up Sure-Cool system.