I should mention, this is for the Ibiza.. but the theory is the same. As long as you increase air-flow to the box while minimising heat-soak, you've achieved the goals.
It took an afternoon to do, i used a power drill with sandpaper wheel in it.
I have also waxed the inside to make it smoother, dont know if it will do anything but seem a good idea at the time
Im hopeing to fit it tomorrow morning if its not raining.
Its not as loud as i was expecting, you can now hear the turbo spining up but the spliter dv does'nt seem any louder.
More importent though the power delivery is so much better, turbo is boosting stroner and longer than ever before.
I also got the 3" feed pipe down the side of the battrey with no problems.
The box is also running a pipercross high flow filter.
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