Maximum PSI Turbo Kits

Stage 1

The Maximum PSI Stage 1 catted turbo kit is the only street legal, factory DME tuned kit available for the E46 M3

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Stage 2

Stage 2 utilizes similar hardware as Stage 1 but incorporates hardware/software upgrades for even more power on MS109 fuel

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Stage 3

Stage 3 utilizes the factory DME with a Maximum PSI engine build using forged internals and a larger Precison turbo.

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Stage 4

Stage 4 upgrades the fuel system from the Stage 3 kit to support more even more power when running MS109.

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 New Precision 6870's getting ready for battle. Email us for pricing!  14's or bust!
 Stock s54's are beasts  E36 getting Stoptech BBK all around!

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  • Sam's 465+whp supercharged e36. It runs e85 and one of our E85 80lb injector supercharger tunes! He is doing some upgrades them coming back for more power.
    Active Autowerke supercharger kit
    Maximum PSI built !">

    November 22


    The only TRUE 3" downpipes currently on the market! In addition to an intoxicating and exotic sound, these downpipes add significant power and virtually eliminate turbo lag, making the fabled S55 engine even more responsive!

    November 15

  • Maximum PSI got some precision 6870's in stock.
    I had to steal one for my 335i.

    November 14

  • Looking for some big numbers out of the new Precision 6870's! Email us at for pricing! for pricing!">

    November 14

  • New Precision 6870's getting ready for battle. Email us for pricing!

    November 14