Anyone know?

[Robert12345]

Does anyone know the best exhaust diameter for a back box on a citroen saxo 1.1L for best performance? as to bigger a hole will give a power decrease and to smaller a hole may give less performance

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[Quick]

On a 1.1 just stick one you like the look of!

You are not going to get any significant gains!

[Dany4494]

Yeah you normal back box has 1.5" exit so gasses can't get out fast enough, your best bet it to put a double 3" back box on I did it to mine much faster same as a vts to 60 or even just run with no back box.

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[stevo67]

Does anyone know the best exhaust diameter for a back box on a citroen saxo 1.1L for best performance? as to bigger a hole will give a power decrease and to smaller a hole may give less performance

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Yes the standard oem backbox,please don't get a chav box lol.:y: