Note: RTS Kits are intended for trucks fitted with lift knuckles that use oversized outer studs
The Kryptonite Ultimate Front End Package is, hands down, the best steering upgrade you can install on your Duramax. Eliminate any potential steering or suspension weaknesses with this 'overbuilt' steering and suspension kit. Idler supports are one of many significant pieces in this kit; they prevent wandering and improve handling predictability, thus minimizing stress on steering linkage and premature wear on tires.
If you can break them, Kryptonite will replace them. Whether you want something to replace your aging factory components, revamp your tow truck, or need to supe-up your front end to handle high HP-boosted launches, Kryptonite Suspension is the answer.
These do not work with Fabtech Lift Kits. These kits will only work on trucks that keep the center link in the factory GM position. If your truck is already lifted, make sure the kit you have is a spindle-style lift kit, not a control arm drop.
If you are installing a Kryptonite Series center link on a leveled or lifted truck, you may need to install longer swaybar end links, depending on how high the torsion bars have been adjusted. We recommend the Kryptonite HD Swaybar End Links. This kit will only work on trucks that keep the center link in the factory position. If your truck has been lifted, make sure the lift kit you have is a spindle-style kit, not a control arm drop. This steering system is modeled after the Center Link on the H1 Military Hummer; this is a much stronger design when compared to what's offered from the factory on all non-Hummer GM HD Trucks. The Idler arm in this kit will not function properly with older style "Drop Centerlink" Lift kits. Or "Drop Control Arm" Lifts kits. For example, older Pro Comp and early 2000s Fabtech Kits.
Kryptonite No Fine Print Lifetime Warranty: Kryptonite steering and suspension components are warrantied for life to their original purchaser. This warranty is against any manufacturer defects, premature wear, or breakage. Race it, jump it, off-road it, wreck it, lift it- I think you get it? We don't care. If you can break it, we will replace it.
Warranty Excludes Heim Joints. Your Kryptonite products must be purchased from an authorized dealer and must complete warranty registration within 90 days of purchase.
Questions and Answers
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2011-2025 Duramax Ultimate Front End Package (ULTIMATE11)
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I'd like to buy the kryptonite ultimate package for my 2018 gmc sierra 2500hd duramax. I have 6.5" BDS lift. Would that be the factory taper kit ?
The Fabtech RTS Taper size kits are only intended for trucks fitted with lift knuckles that use oversized outer studs. If your BDS lift doesn't use oversize outer studs, you'll want factory taper size. Please note: if you are installing a Kryptonite Series center link on a leveld or lifted truck, you may need to install longer swaybar end links, depending on how high the torsion bars have been adjusted.
Vehicle Fitment
- Part No: ULTIMATE11
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Customer Reviews
Overall rating: 4.8 / 5 from 13 reviews.
The bracket for the pitman idler arm wont fit without modification because of the brake line. So i didnt install it. If you want to install it by yourself as i did be sure to have the right tool.
Like a lowprofile pitman arm puller, only thing i couldn’t install in the kit.
The parts seen to be built with great quality. Definitely seem way tougher then the stock stuff. It’s a pretty straight forward install but it would be nice i the directions were in colour. Overall pretty stoked.
Well let me tell you about my experience, I blew up the front end of my truck. Started getting quotes from everywhere I could. Not only where most places more expensive, they had to order in the parts I was after. Came across Dirty diesel on FB. On a whim called for a quote. They came in cheaper then everyone else and had the parts in stock. I was a little worried that I live in calgary and the parts had to come from BC. How long it would take. Called at 3:30pm talked to a super helpful guy. Said 1-2 days. I hung up went online and ordered the parts got confirmation at 4:00pm. I was later treated with emails touching base that they have received payment and would be shipped right away. I emailed the next day because the tracking number provided did not work. My email was answered right away but to my surprise my wife’s texted me and told me the parts where at my house at 11:30 am next day. Had my mechanic go pick them up and everything was there. Amazing. Super happy with the service and now my truck feels like new again. Now testing it out.
Absolutely recommend!!! To anyone with some or little play in front end, spend the $$ and get it all upgraded at once, not to mention that absolutely amazing customer service and experience with dirty diesel ! Hats off totally blown away thanks
Just installed and these are the gold standard for steering upgrades. Feels nice and tight and you have confidence that they will be super solid for a whiles to come. You could save a little and rebuild the stock setup if you're on a tight budget but if you can stretch to the extra cost you won't be disappointed.