EM TuningJMB Retrofits
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  1. #1
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    Sports cat + standard exaust question?

    Hi I'm currently getting my car custom will having a xspower manifold downpipe sports cat and the rest of the exhaust standard affect the level of power acheivable significantly over a decat and milltek??
    current mods are hybrid stage 4 turbo, xspower Manu downpipe and sports cat, welly cooler, forged rods, b5 tip, and 007p an a few other small bits. I was hoping to achieve around 300 but not chasing it just want to know if the current setup will hinder this goal?

    Thanks

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  3. #2
    <tuffty/>'s Avatar
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    The OEM back box is quite restrictive as power rises... I did run mine for a very short while when I first went big turbo and the EGT's were insanely high.... (was over 350hp at the time)

    Keep an eye EGT's during mapping if you haven't got the budget for a Miltek or a custom cat back... sports cat should be fine, its the back box thats the next restriction in the chain....

    <tuffty/>
    Silver 2001 AMK S3. Silver alcantara interior... now with added powarrrrrrrr, torques. VAGCOM + KII-USB. >> My build thread...

  4. #3
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    I'm hoping to get a milltek when it comes back, i had booked the mapping already when I spotted a potential but lol it's just they've phoned up and said the sports cat and standard oem exhaust may reduce the power I'll get, wish I had initially fitted a decat it was just to avoid mot issues

 

 

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