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    HPF Sleeper series Exhaust (pre-production)

    We're buttoning up the last bit of our prototype sleeper series exhaust. Barring any issues, this is how we'll have them set up. This one just needs to get finished up and we'll be doing testing as soon as Tony's car is ready for the dyno! Stay tuned for DB readings!

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    Looks good Click here to enlarge
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    Time Attack ///MZ4

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    So this will be an electric cut-out type thing?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    So this will be an electric cut-out type thing?
    It's a QTP cutout thats mated in between the std stage 2.75+ exhaust and an OE style rear section, in this case, it is an OEM muffler. This particular car will be using ProEFI and we'll likely be activating the cutout via the EMS under predetermined conditions.
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    Click here to enlarge Originally Posted by HPFBranden Click here to enlarge
    This particular car will be using ProEFI and we'll likely be activating the cutout via the EMS under predetermined conditions.
    So say a race map or something and the cutout is activated? Manually is not an option?

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    Click here to enlarge Originally Posted by Sticky Click here to enlarge
    So say a race map or something and the cutout is activated? Manually is not an option?
    Actually, the QTP might not be the option we're looking for Click here to enlarge

    I didnt' realize that this thing requires you to hold down a button til it's fully open as opposed to give it power once, and it opens fully.

    We'll still test it, but we'll likely end up leaning towards the SP cut out.
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    HorsepowerFreaks.com
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    BMW Performance Parts
    Product questions or to purchase - branden@horsepowerfreaks.com

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    Click here to enlarge Originally Posted by HPFBranden Click here to enlarge
    Actually, the QTP might not be the option we're looking for Click here to enlarge

    I didnt' realize that this thing requires you to hold down a button til it's fully open as opposed to give it power once, and it opens fully.

    We'll still test it, but we'll likely end up leaning towards the SP cut out.
    I think that was a good change in direction. The SP cut out will work well for this application. Works great on my car thus far.

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