On 3 Performance 1999 – 2006 Chevy / GMC 1500 Twin Turbo System 800HP Package

(4 customer reviews)

$4,199.00 $2,999.00

On 3 Performance Is Proud To Announce The Newest Twin Turbo System 

Silverado / Sierra 1500 Twin Turbo 800hp System

Twin 55mm On 3 Turbochargers, Stainless V-Band Housings Standard!!



We have been working on a new twin turbo 1500 design throughout 2015 and the test vehicle is up and running.  Its turned into the owners personal daily since it was complete and has been throughly tested while we gain testing data and feedback.  So far we could not be any happier with the system and the new line of On 3 Stainless Steel turbos are exceeding any expectations we had on the design.  The truck literally is instantly into boost whenever you want it, making it a monster to daily drive.  The low end power make the truck more enjoyable to drive and gas mileage is somewhat unaffected depending on the driving style.  Its currently setup on E-85, custom twin pumps and a set of Deka 80# injectors to feed the fuel.  On the highway, we still are getting somewhere around 16-20mpg depending on the road.  This is amazing coming from an older Trailblazer SS which had a twin screw supercharger and 42# injectors that was lucky to get 9.5mpg average at any given time.

We offer this system in 2 different stages, the 800hp system which is going to include the On 3 Performance 55mm turbochargers and the 1000hp system which is going to include the 61mm turbochargers.  Either option is going to have an upgrade available to go with the ceramic ball bearing if required.  To gain all of our testing info, we started with a bone stock 2004 GMC Sierra 1500 with a completely stock 5.3 engine.  We did not touch the engine so its the same as it was when GMC rolled it off the production line.  We want o show whats possible on a stock truck and clearly with a built engine your talking sky is the limit.  Granted this might be pushing it, the truck made 610rwhp and 675ft.lbs. on 13psi.

A majority are not going to push the stock engine that far so the kit is setup out of the box to make a reasonable 6psi.  With the included boost controller, you can simple dial the boost up to 12psi and have full range of control.  If your planning for a more serious build in the future or already have the supporting mods to go big, we have 1000hp package as well with our On 3 61mm turbos.  All of the kits standard will have the newest design exhaust housing which is a stainless steel investment casting.  This utilizes a V-band inlet instead of the traditional 4 bolt t3 or t4 pattern that most are used to seeing.  This makes installation and adjustments a breeze when setting up your truck.  This is new technology that we will be developing around and hopefully re-visiting older kits and allowing for them to also use these same housings.  When you see a turbo car thats been together for a few years my eyes get drawn to the exhaust housings that surface rust pretty quick being cast iron.  Thats a thing of the past with this new design, almost too nice to even cover with a turbo blanket.  These housings are designed to be lighter, spool quicker, flow better and clearly look better.

The intercooler is unique on this design as well, its a proven TT core that we have sold now for almost 2 years and have seen over 1200rwhp with it.  So there is no need to prove it when we have already pushed it to the limits.  It was able to keep IAT’s in check at that power level and about the point where we would call it maxed out, well beyond the limits most will push it to.  Thats at least 1400HP at the crank which is an insane amount of power that it will be capable of flowing.

With everything to this point being able to support at minimum 800HP, we need to address the exhaust.  The turbo manifolds are a fully tubular 1 7/8″ primary header that is made out of insanely thick 3mm wall tubing up to the collector.  From the turbo back, your going to be supplied 3″ downpipes that come down to an intergraded X-Pipe design as you work your way back.  So its a full dual 3″ 304ss turbo back system which terminates roughly at the underside of the bed.  So if your making 500 or maxing it out in the 1000 range, you know your system is fully capable of flowing the power.  This is the great part about going turbo over a blower.  One system will take you from a base 4 or 500hp all the way up to 1000.  All driving characteristics remain the same and we believe the trucks even drive better.  You are going to retain all your accessories and most importantly AC.  In the summer time the AC really strains the engine with the additional load and physically will hear it.  Thats not the case with the turbo, your not taking any power away to make more!


Without a doubt, YES!  Although the wheels are larger both exhaust and compressor side, the spool up is not going to be much slower and less than 500rpm difference.  So if you are certain you are going to go big down the road, go big now and save yourself money as the turbochargers are not cheap in this configuration

Details on our prototype test truck-   We started as we mentioned with a stock 50,000 mile 5.3 1500 and did a few supporting mods to know it will handle the power.  First off, as far as the kit goes, we tested with the 800HP configuration so we have the On 3 55mm turbos on the truck with the smaller .63ar exhaust housings.  We wanted the quickest spool and to make the truck as fun as possible for daily driving.  The engine long block was UN-TOUCHED.  We pulled the factory 4l60e transmission to make room for a 4l80e from a 2500 and paired it up with a good converter.  The rear end retained the stock axles but we do plan on drag racing and didn’t want to hurt the diff.  We upgraded to a new posi and going to test and see how well the stock axles will hold up to the 600+rwhp/rwtq.  As for the fueling, we went for one of our On 3 e-85 systems which is a dual in tank 320lph pump combo, 80# injectors and custom return line setup.  We will offer this full fuel system package with the kits if you have intentions to go e-85 or smaller injectors if you will stay with pump 93oct.

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Check out the teaser video we filmed of the truck in action, talk about the ultimate sleeper:




Silly Ferrari 458 owner thought he could embarrass the little blue truck, even took the hit and took a serious beating!!!



Turbo System Includes:

Hot Side:

  • On 3 Performance Tubular 304ss Turbo Manifolds (Top Mount Design)
  • On 3 Performance 3.0″ 304ss Mandrel Bent Down Pipes
  • On 3 Performance Custom X-pipe Midpipe Section
  • Complete SS V-band Clamp Kit
  • SS Lap Band Clamp x3
  • On 3 Performance 44mm V-Band Design Wastegates (6psi) x2

Cold Side:

  • On 3 Performance 1400HP Bar & Plate Air To Air Intercooler
  • On 3 Performance CNC Billet Machined Mounting Bars
  • On 3 Performance Compressor to Intercooler Cold Side Tubing – All Bead Rolled
  • On 3 Performance Intercooler to Throttle Body Cold Side Tubing – All Bead Rolled
  • Black 5ply Silicone Coupler Kit
  • Stainless Steel T-Bolt Clamp Kit
  • On 3 Performance 50mm Blow Off Valve w/ Clamp
  • Custom Turbo Silicone Air Inlets
  • On 3 Performance High Flow Urethane Air Filter x 2

Main Kit Items:

  • On 3 Performance 55mm Journal Bearing Turbocharger x2  Optional Ceramic Ball Bearing Upgrades Available
  • Stainless Steel V-band Entry Exhaust Housings .63ar Standard (Below 700HP)  1.06ar Optional if going 700+HP
  • On 3 Performance Turbo Oil Supply Kit
  • On 3 Performance Turbo Oil Drain Kit
  • Custom Silicone Radiator Hose Kit 2pcs
  • On 3 Performance CNC Billet Coolant Fill Port
  • On 3 Performance Custom A/C Line
  • On 3 Performance Manual Boost Controller
  • Custom On 3 Billet Overflow Tank
  • Installation Guide w/ Photos

4 reviews for On 3 Performance 1999 – 2006 Chevy / GMC 1500 Twin Turbo System 800HP Package

  1. Matt

    How soon will the twin turbo kits for the 07-13 be out?

    • admin

      We are not designing a TT system for those trucks, just the 99-06 for right now

  2. Manuel

    What mods were done to the engine?

    • admin

      Stock 5.3 and still going strong 🙂

  3. Jesus deloera

    How would a 4.8 handle this kit ?

    • admin

      Our shop 5.3 truck clearly makes good power, they are strong engines

  4. Rich

    Will it work on my 2003 5.3 4×4 Silverado

    • admin


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