The L5P Stealth STR Turbo! Your #1 Choice Stock Replacement Turbo For 2017+ L5P Duramax Trucks!

Our newest Stealth Turbo has landed! The L5P Stealth STR is now available for all 2017+ 6.6L Duramax trucks. Nick details every aspect of why this Stealth turbo is the best option when looking for better-than-stock power capability, no compromise on spool-up, and a great daily driving/towing turbocharger.
Check out the L5P Stealth STR!
2017-2019 L5P 6.6L Duramax Stealth STR: duramaxtuner.com/turbo-charge...
2020+ L5P 6.6L Duramax Stealth STR: duramaxtuner.com/turbo-charge...
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There's nothing better than upgrading your parts instead of just replacing them. That's why the Stealth STR is the perfect upgrade for your 2017, 2018, or 2019 Chevy Silverado/ GMC Sierra 2500/3500 L5P Duramax. It combines the affordability of a stock turbo replacement with some of the best upgrades you can get in a drop-in L5P charger. Whether you’re looking for more power or simply a do-it-all kind of turbo with some added durability the STR delivers.
63mm Air Grabber Compressor Wheel
• Air flow to support 625rwhp (dynojet) with emissions in-tact
• 7-blade design provides higher airflow than stock
• 63mm sizing for peak weight to efficiency optimization
• Lighter wheel design provides unmatched spool-up
• Featuring the latest advancements in compressor wheel technology
• Air Grabber Technology for even more additional airflow
• Made out of aerospace-grade billet aluminum
• Peak boost of 40+psi
65mm High Flow Inconel Turbine Wheel
• 65mm exducer compared to 62.5mm Stock
• Noticeable turbo whistle
• 9-blade design provides higher flow and lower EGTs under load
• Excellent boost to drive pressure ratio
• Better durability than stock
Rotating Assembly (Compressor and Turbine Wheels)
• 6% lighter than the stock rotating assembly
• Provides lightning-fast spool-up
• Boosts turbo efficiency and lowers drive pressures
• Precision balanced in-house
Ported Exhaust Housing
• Larger exhaust port opening to match larger turbine
• Better exhaust gas flow post-turbine
• Less back pressure
Stealth Turbo Benefits
• Absolutely no core charges
• Brand new parts and accessories
• Brand new actuators available
• 1-year warranty on all of our turbos
• Extended warranty available
• Live on-site customer support team here to help
This turbo is a great fit if you...
• Have reliability and performance as your top priorities
• Want immediate response and great daily drivability
• Have a Box Tuner or Custom Tuning installed on your truck
• Want to make 625+rwhp or less
• Tow with your truck often
• Have a completely stock truck (this turbo does not require tuning)
• Need a new replacement turbo for your L5P

[@HunterSkiff]

Love the data

[@JamesMasterPlaster]

Can’t wait to bring you guys my 2013 dually Duramax 👍🏋️‍♀️🤺

[@Duramaxtuner]

@JamesMasterPlaster We can't wait to see it!

[@Upsidedownfoodpyramid]

Are these 50 state legal?

[@jackpagano295]

I have the edge evo ht2 tuner. Will I need further tuning if I install this or will the power levels be the same as the pre loaded tunes? ex: extreme tune 150hp

[@Duramaxtuner]

Hello, the Stealth STR will work with box tuners.

[@duramaxadventures5832]

With removing mass is sustained load an issue when it comes to longevity due to heat? Obviously tuning matters most especially egt back down, just curious if sustainable EGT is lower due to this. Also when is it coming to LLY-LMM sounds like a fantastic way to update older trucks as their turbos age especially if towing is their primary goal vs top end horse power. Won't have the lightning fast L5P vane control. But If you can get response via the turbo mass instead of running rich to get the turbo up to speed seems like it could help these "dinosaurs". 😅😅

[@nickpriegnitz5895]

The mass we are removing on the turbine is in the blade count and hub. It is not the thickness of the blades or related to their ability to diffuse heat. You’re right on about moving this tech into our VVT and LML lineups. Look for a super quick VVT STR next. ;)

[@duramaxadventures5832]

@@nickpriegnitz5895 You mentioned somewhere in your massive educational library, that lower vane count can make it more susceptible to surge. Obviously L5P you have your anti-surge adapter. But on these earlier trucks will surge be a problem? Any plans to increase vane height on like the LBZ to give a bit more controllability to EGTs when we're running peak power sustained on an aggressive grade in 115F weather? I'm just picturing a turbocharger similar to factory size allowing factory-like lug ability far exceeding stealth 64. With all of the responsiveness anybody could ever really want out of an LBZ. With the additional benefit of fuel economy gains from being able to run leaner and still have that level of responsiveness for a slightly more enthusiastic driver.

[@nickpriegnitz5895]

@@duramaxadventures5832 With regard to surge, the 2004.5-2016 trucks also have anti-surge mechanism. It's not a 'cure-all' but if integrated properly into oversized drop-in style turbos like our Stealth it will certainly do a lot to minimize surge. Good memory on the blade count vs Surge discussion. It's really a balance between inducer size, blade count and blade attack angle. The short answer is that on a compressor sized smaller like the STR we can get away with fewer blades because smaller inducers are less surge prone. We use fewer blades to try to claw back a bit of top end airflow. The LBZ Vane height in the Stealth 64 is already about 15% larger than stock (surprise!). There's a limit to how much more height is useful (2 reasons). 1 - Vanes heights different that stock require tuners to pay attention and 2- There's a 'vane position' where the nozzle is acting most efficiently on the inducer blade. Increasing vane height forces more vane position at low speed/load which may hurt efficiency in those ranges. We do our best to balance all of these considerations in our builds.

[@KOSTASFK1200]

I'd like to know what is the "New manufacturing process"

[@Duramaxtuner]

@KOSTASFK1200 We don't want to give to much away but the new manufacturing process provides a greater compressor wheel surface area. Similar to that of a point milled wheel.