uprating the gearbox to a ml5t to cope with power. gearbox costs, clutch costs (not cheap), then new pedal box as its hydraluic where as my 309 is cable.

then you have things such as decomp plates £160 or so.

and all the little bits add up, for example blow off valve with fitting kit your looking at £80 for a cheap one, same with waste gate. Its all the things you dont think about that cost the money, for example injectors, covers, engine mounts, materials etc.

In all fairness, the 3-4k i have spent includes the car and engine as i did not already have them, so if you have them then take off £1k straight away. If done properly and you dont end up buying the wrong things and you already own the car and engine then £2k and you may just do it.

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309 GTi6-T