Forge Diverter Valve, 08-10 Cobalt SS / HHR SS / Cadillac / Regal w/ 2.0L Turbo

Review star icon Review star icon Review star icon Review star icon Review star icon
Model Number: 243191

The OEM diverter is mounted on the turbo, and is built with a rubber seal, and a spring. Once vacuum from the intake manifold pulls on the diverter, the valve will open and release air from the turbo. Over time, the rubber seal becomes brittle and wont seal as well. The spring can become weaker as well, which will cause the diverter to not seal as well, and you'll loose boost pressure. Especially at higher boost pressures!

This is the fix for this. This made from scratch aluminum diverter is made in Great Britain, and is made to handle high boost pressures. It has brand new seals, aluminum piston and has variable springs for different boost pressures. This will hold your higher boost pressures and help restore some of the boost pressure that may have been leaking out.

This diverter comes with two springs, green is pre-installed for 15-22 psi, and a yellow accessory spring for higher boost levels.

Below is a video we made explaining the benefits of the Forge valve and why its better than the OEM diverter.

Below is a video of a Cobalt Turbo on YouTube demonstrating the Forge Diverter valve.

This Forge diverter valve fits the following vehicles:

  • 2005-2010 Cobalt Turbo
  • 2008-2010 Chevrolet HHR Turbo
  • 2.0 Buick Regal Turbo
  • 2008-2010 Pontiac Solstice
  • 2008-2010 Saturn Sky Redline
  • Cadillac CTS/CT6/XT4/ATS with 2.0 turbo engine

Forge Diverter Valve, 08-10 Cobalt SS / HHR SS / Cadillac / Regal w/ 2.0L Turbo, Turbo Accessories: Store Name

Ask a Product Question

  • Tina
    Will the use of this product (Forge Diverted Valve) void my vehicle warranty?
    1 Answer
    • Modern Performance

      It shouldn't, as this does not change the way your motor operates. It's still controlled by the factory vacuum lines and therefore is a very safe mod.
  • Aaron
    Ship to Canada? How much to Newfoundland a0g 4m0
    1 Answer
    • customer service rep

      Yes of course. Please add the item to the shopping cart and then type in your address in the checkout page for a shipping quote.
  • Mike
    Will this throw any check engine codes?
    1 Answer
    • customer service rep

      No, you will not have any check engine lights with this. Its simply a factory replacement and it functions just like a factory oem diverter valve.
  • Dustin
    What kind of maitnance does the diverter valve need? Also what are springs boost recommendations?
    1 Answer
    • customer service rep

      Forge does not make note of any maintenance needed, however every few years it wouldnt hurt to dissasemble it, clean it and use grease to lubricate it. You may have to contact Forge for specs on the grease used.

      There is a spring thats pre-installed, thats good for low to mid 20 psi of boost. You can switch to the other spring if your boost is not staying solid and is tapering off.
  • Chris saunders
    Is there any tuning required or is it just replace and go ?
    1 Answer
    • Customer Service Rep

      For this valve, you can install it and not have to do any tune. If you get the VENTED valve (the other one we offer), which releases air to atmosphere, you'll need to get a tune for that one as it will change the way the car runs.
  • Daniel
    If I have the high boost spring (yellow) in will it only blow off at high boost? Or is it only ment to withstand high boost but still blow off at low boost
    1 Answer
    • Customer Service Rep

      This valve will blow off regardless of which spring you have. The difference is that the stronger springs can tolerate higher boost levels better. The danger is that if you put in too strong of a spring it will not open properly and you wont have much noise, and you'll have some compressor surge.
  • Jay
    This will work on the 2011-2013 buick regal 2.0 lnf turbo engines right?
    1 Answer
    • Customer Service Rep

      Yes, this works on many 2008-17 GM Turbo 2.0 four cylinders including the Cobalt, HHR, Solstice, Saturn Sky, Fisker Karma, Buick Regal, Saab 9-3 and 9-5, Buick Verano, Cadillac ATS, Cadillac CTS, Chevrolet Camaro and more.
  • Jose
    I have a 2008 cobalt ss w/ z54 turbo is this good for it?
    1 Answer
    • Customer Service Rep

      We are not familiar with that turbo, but if that turbo can use the OEM diverter and has the three bolt flanged diverter, than this would work.
  • Michael Nichols Jr
    The only difference between this and the Atmospheric version is the sound? This one doesn't require a tune.. Can you still hear this diverter valve louder thro the intake or is it quiet like factory.
    1 Answer
    • Customer Service Rep

      Correct, the Atmospheric valve releases to atmosphere. In a car with a mass air flow sensor like the Cobalt, releasing to atmosphere can cause drivability issues as the car will go very rich. Thats why we do not recommend that one. The normal Forge valve is fairly quiet. You can hear it a little bit (its louder if you have a aluminum or metal tubing air intake). If you read the reviews, there are many people that posted reviews on this product (click on Read or Write Review below the title of this item) and one of them mentioned this valve is slightly noticeable but not loud.