MPx 4.0" Boost Leak Tester

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Model Number: 601140-4INCH

This listing is for 4 inch MPx boost leak tester, which is for use with BIG AFTERMARKET Turbos. This will NOT WORK WITH THE FACTORY TURBO on the Neon SRT-4/Caliber SRT-4/Cobalt SS. If you have a Factory turbo, see our listing for a 2.5 inch inlet boost leak tester.

Have you ever experienced any of these situations with your turbocharged car?

  • Had less peak boost than you had a few months ago ?
  • Does your car seem a little bit slower ?
  • Ever wonder if you could have a leaking pressure pipe in your engine?

If you've answered yes to any of the above questions, then this device could come in very handy.

This device is a piece of test equipment that will allow you to find out if there are any leaks from any hoses, clamps, cracked housings that could be leaking boost.

The boost leak tester is a very simple piece to use, you simply remove the intake tubing to the turbo, and then clamp on the boost leak tester onto the turbo inlet. Then pressurize the turbo and piping with a air compressor. This will fill the piping with compressed air and will allow you to listen for any leaks.

The MPx boost leak tester is made with a 3 ply silicone rubber coupler for secure sealing to the turbo, uses a aluminum machined end cap, and a pressed in brass threaded tire valve.

MPx 4.0 Boost Leak Tester, Turbo Accessories: Store Name

Ask a Product Question

  • Oliver

    Does this tester works on a 50 trim turbo?

    Thank you!
    1 Answer
    • customer service rep

      Most larger turbos have a 3 inch or 4 inch inlet. Its best to measure the turbo inlet size if you dont already know to make sure you get the right size.
  • Stephen Lewis
    Does this tester come with a gauge and if not do you just go by the pressure on your compressor or fill it little by little and check with a tire gauge? After filling the system will it hold air or will you need to keep the compressor pumping say 20 psi for example?
    1 Answer
    • Customer Service Rep

      A gauge is not neccesary. Just attach this to the turbo, fill with air, and find the source of the leak. Then fix the leak!