6XD Modular Design Advantages
The 6XD Sequential Gearbox has what NO OTHER sequential Offers! 250+ ratios, replaceable dog-rings vs gears, independent shifter barrels, rotatable forks, (12) inputs, 6XD can be rotate 90* for lower crank centerline to the ground!
6XD Simplicity of Service
Swapping out drop-gears for longer-shorter overall stack in 8-10 minutes! Replaceable dog-rings/sliders in 15-20 minutes, rotating shift handle for exact location YOU want!
6XD Low Cost in Stock Items
6XD is designed, engineered to have DOUBLE the life & STRENGTH regarding internal wear parts such as forks, shifter barrels, and gear sets! Clients mentioned they have saved thousands of dollars already.
100% American Made - In House
6XD sequential components are 100% designed, engineered and made in USA, this allows us to also make custom items quickly for YOU and make changes to current parts which may benefit your special application!
6XD built by Senior Lead Builder w/40+ years Winning Experience
RTS/Rick Lamber, he has built a significant amount of award winning race transmissions over the years. Every unit runs on dyno spin-rig for 45 minutes ensuring top performance for plug n play installs.
Award Winning Customer Service & Installation Assistance
We’re 100% committed making sure YOU are taken care of with experienced guidance, assembling everything needed for a Plug n Play package! YOUR one stop shop for SUCCESS!
Where High Performance Counts, 6XD Gearbox Delivers!
Our 6XD Sequential Gearbox /LATEST NEWS
In 2018, we went from drawings on paper to an actual production racing product in 11 months! Unheard of right?, not really when you combine the proven experience of RTS INC owner Rick Lamber and SS mfg engineer Clay Stephens working together to deliver winning results!
* 1st Year = * Not One Failure Ever / 31 wins / 5 Championships *
* 2018 to date 6XD product achievements: 298 Podiums, 12 World Championships
* Building on that legacy, we are thrilled to announce our 2026 World Release: The 6XD-MTX “Mid-Engine” Transaxle. This unit is designed for any mid-engine build requiring the input shaft to sit lower than the CV flange centerline. It is a perfect fit for vehicles like the Ultima RS, Peregryn Motors, RCR, Superformance, CAV, Tornado, Gelscoe Motorsport, Pathfinder GT40R, Porsche mid-engine conversions, and more.
Looking ahead, we are already planning our next major drop for the summer/fall of 2027: The 6XD-RTX “Rear-Engine” Transaxle.
* Email us with your ideas for new racing projects, we like to make dreams a reality!
We Make Dreams a Reality!
We’ve Been Building For Over 40+ years
Our 6XD Team has an Impressive Winning Resume to prove it:
“298 Podiums, 12 World Championships in C.A.R.T, IndyCar, NASCAR, World Drift Championship, Formula Drift, Time Attack and Trans-Am Series!
Client Testimonials
ACP Motorsports / Trans-Am Series / 6 Wins 2019 = 5XD!
“The 5XD sequential gearbox is the smoothest shifting, most reliable, and trouble free racing transmission I have ever had in any race car I’ve driven in 50 years. The customer service I have experienced regarding RTS INC owner Rick Lamber / SS mfg owners Clay Stephens & Skyler Schipper has been unmatched by any other driveline supplier ever!”
Kerry Hitt
Driver/Owner
FD Pro1 Series
“It really is the World’s BEST sequential I ever used, the 6XD is truly Insane, thank you!
I’m so glad to have RTS INC and SS mfg apart of our racing program”
Cameron Moore
Pro1 Driver
FD Pro2 Series / 5 Wins & Lone Star Drift Championship 2019
“The 6XD gearbox has been such a drastic improvement to our car this season!
The box has taken any and all abuse we could’ve thrown at it. It’s been used in more than 15 high intensity drift events this season and the reliability has been impeccable!
The support of the RTS INC / SS mfg team has been amazing and they’ve developed one incredible product!!!”
Nick Noback
Pro2 Driver
6XD-MTX Mid-Engine Transaxle GTM Installed…
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6XD GEARBOX