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  1. Guerilla custom bypass/valved exhaust system

    They are deemed to be a leak in the system. Most mot guys don't care but it is a failure.....
  2. Guerilla custom bypass/valved exhaust system

    No cut out's on our system......switching is internal and mot compliant unlike simple cut out systems
  3. What did you do to your UK S550 Mustang Today

    Right hand oem header upgrade and tune.......oem air box and filter, standard cats and exhaust.
  4. What did you do to your UK S550 Mustang Today

    Finished our sport pac.....
  5. What did you do to your UK S550 Mustang Today

    Hi, Will have dyno chart info and pricing sorted next week as currently adjusting maps to suit the new airflow...... Header is direct replacement using all oem bolts and mounting points so a good upgrade to the crushed oem unit...... 1.75" primaries into stepped header finishing at 3" into...
  6. What did you do to your UK S550 Mustang Today

    Upgraded our UK spec v8 S550 drivers header to a much less compromised design. Oem replacement retaining all factory parts.
  7. What did you do to your UK S550 Mustang Today

    Finally sorted the offset of the oem wheels........15mm front and rear gives the look i was after and with the UK specific Pedders coilovers the car now looks right..
  8. The UK S550 "spotted" thread

    Three today......two Race Red on the A27 from Chichester to Arundel and one Magnetic on the way to Horsham. All looking good
  9. Car dies on start up after tune

    Your maf calibration is based on the cross sectional area of your intake track where the maf is mounted. So if it is programmed for a 100mm tube and you have 82mm then it will meter the wrong fueling. The o2 sensors will try and bring it back in line but it will struggle until it has enough long...
  10. Car dies on start up after tune

    If you log your fuel trims it will tell you if the maf curve is correct or not......maf period stft or ltft would be good to log (max 3-5% error). Also log cam phase as this can cause the problem you describe.





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