Finally we have 2 kits in stock available for immediate shipment. We have a batch of 50 turbo manifolds that will be here in approx 6 weeks, and the kit will be a full go for retail sales.

Retail price is $2800 base Journal Bearing kit. We are offering these 2 kits up for retail, after installation, tuning, dyno, forum write up...etc we are offering $200 compensation checks.

here are the full details


This is an upgrade kit, and does not include any bolt on parts that may be needed to run a complete stage 4 kit. We have only included the turbo upgrade kit in this package mainly due to people already having current bolt on modifications, this will also make pricing more reasonable. With over a year and half of manufacturing delays, without further a due, we are proud to announce the release of the stage 4 Treadstone Cobalt SS turbo upgrade kit!

We decided on using Precision's line up of turbochargers. They were the first to release a billet compressor wheel and we feel, these turbochargers offer great spool up, response, and power for the money! We teamed up with Turbosmart, and they offered up some great deals on the 38mm wastegate, and 50mm blow off valve.

Turbo Manifold
08+ Cobalt SS 2.0 LNF Turbo, 304 Stainless Cast Tubular Manifold. Treadstone manifolds are cast using the latest in turbocharger-manifold technology using state of the art CAD based techniques. They benefit from an exclusive investment casting method utilizing bulletproof 304/347 stainless steel. The high thermal inertia and excellent heat retention of cast stainless steel provides the turbocharger with as much thermal energy as possible. This effect raises the overall efficiency of the system and produces results superior to tubular/welded manifolds. Furthermore, stainless steel is virtually impenetrable to rust and other forms of corrosion and will stay looking beautiful for years to come. No more rusting looking turbo manifolds!



Downpipe and Dump Tube
The downpipe is hand crafted in the USA from 304 stainless steel and tig welded to perfection. Included in each pipe is a flex section to prevent cracking from the constant vibration and heat cycling a turbo system goes through. We decided to recirculate the dump tube quite a ways down the downpipe, this aids in wastegate efficiency and reduces unwanted noise. This can be easily converted to open dump with slight modification to the pipe.

Turbocharger selection
We choose to start of with the base T3/T4E 50 trim, or precision 55mm compressor wheel and 57mm turbine wheel, better know as the 5557E. A simular size turbo to a Garrett GT3076R. This is one of the most efficient compressor wheels to date, the ratio of inducer to exducer measurements are a perfect combination for use on 2.0 to 2.5l motors making upwards of 30psi. We feel the 58mm wheel falls of in higher PSI application, and this has been scene with many SRT4 and Subaru testing in the past. The next turbo size up, we would only recommend for guys wanting to break the 500whp mark, and go with a 6262SPSkipping over the 5857SP is not a very big jump in turbo size, and your better off with a 6262. This is similar to a GT3582R from Garrett. This turbo has the potential to make up to 600whp+ on this platform and is only for the big power fully built guys.

Wastagete and Blow off Valve.
Since we are getting rid of the stock turbo, and stock bypass valve, you have the option of running a Turbosmart blow off valve or none at all. Our pipe only includes provisions for a Turbosmart, if you want to run any other BOV, you will have to cut and weld the pipe, as well as re-powder coat it. We can custom weld any BOV flange on for an upcharge of $70. In the future, we will probably make more pipes with more BOV options, but we currently have 50 sets in staock all withthe Turbosmart flange.Wastegate The wastegate is in an ideal optimized location to route exhaust gasses away from the turbine wheel when needed. The need for a larger wastegate in this set up is not needed because the the placement of our wastegate. With this optimized location, boost creep and boost spikes will never happen!


here is a link to the kit on our site
Cobalt Stage 4 Turbo Kit- TREADSTONE PERFORMANCE

 

****, NOW YOU MAKE EM AVAILABLE?!? I would have totally bought one if I didn't buy zzp...

 

Very nice. I may get this next tax season. Im content with what I have for now.

 

dont want to sound stupid, but wouldnt that fit the lsj as well? thats deff a nice piece. am talking about the manifold and turbo+downpipe setup.

 

i was wondering when you guys were going to release these! well when i buy i might have to look into these as well, good job guys

 

Nice, ball bearing or journal bearing. I think since turbo timers really arent an option on the LNF platform, ball bearing maybe the way to go. Are these turbos only oil cooled or water cooled? or do you have a combination like the factory borg warner? Im sorry I dont have a grand turbo knowledge. If I can some how find the money I would be all over this.

 

Good kit, tuned Frossb and it is well worth the money..

 

are we safe to assume that charge piping and intakes will bolt up in stock locations...

 

Since inducer side is larger no, it'll need a larger coupler ... Charge pipes should be very close.

 

would love the gt3076r upgrade.

 

-yes, i believe these will fit the LSJ with a waterneck replacement pipe
anyone want to try one out and be the test mule, its with some compensation.

-Precision does not offer watercooled turbo options anymore(I wish they still did). So we have to block off the water ports.

-Any aftermarket piping and intake pipes will bolt up no problem. just a matter of getting the right silicone adapters


-We will be able to offer the Garrett GT and GTX line up of turbochargers in the future

 

Damn I wish I had the money. Definitely will be seeing me ordering this kit next tax season

 

Are there Turbo options with an Internal BPV, for those of us who dont want to deal with a BOV?

 

do guys have pictures of this already bolted on to a Cobalt?

 

Looks good. Any numbers from that fross guy yet?

 

I'm a little confused about one of the statements you made...

"Since we are getting rid of the stock turbo, and stock bypass valve, you have the option of running a Turbosmart blow off valve or none at all."

Are you saying that a blow off valve is not necessary? Where would the built up pressure go?

 

sure you could run without a blow off valve. just keep your boost tuned low. like 5psi or less and the turbo should be okay

 

I wouldn't recommend that either...

 

for the BOV question, we have scene many high performance race cars not run a BOV at all, keeps boost in the tubes between shifts for quicker spool up. you just have a flutter sound. I dont recommend it either, but these guys turbos dont blow from the back pressure.

As far as Fross getting us some dyno #'s, he has had some bad luck with his car lately, "Nothing wrong with the turbo kit" he said..... and we should see some #'s in a few weeks.

~jason

 

Sub'd for numbers

 

Frossbs issues were not tuning related either. They were vacuum and boost leaks right now he is a conserve rink.g tune because he's only able to run 91* octane ..

 

Was his car ever running right with this setup? How is the powerband?

 

back out the same place it came from... a good way to wipe out a turbos thrust bearings... plus tuning would be a blast!

 

The 5857 is a fine turbo for the lnf. I made 500 whp with 30 psi. and the spool is good

 

i might just have to go with this set up rather than the ZZP kit