You have the 02J 5 speed gearbox?
It should be as its AGU anyway.
You can't replace the flywheel without also replacing the clutch as the dual mass flywheel uses a solid pressure plate, so you'd destroy the engine by fitting a single mass flywheel and not doing the clutch.
Anyway, you can replace the clutch with a Genuine VW Sachs clutch from a VR6 which gives you a maximum of 400Bhp, 300ft.lbs, the clutch itself brand new from the dealer is £130.
You also need the clutch bolts, which are about £2 each and whilst you are doing the clutch, you might as well replace the rear main oil seal.
Bascially, total price will be £200 inc VAT from dealers.
This then give you a sprung pressure plate, which means you can use a single mass flywheel.
I can personally recommend a flywheel from an ABF or G60 Golf, get it lightened and balanced and it makes for an amazing car.
The clutch is lighter than standard, and the lightened flywheel makes a huge difference, both in rotational inertia and clamping, the car is a LOT nicer to drive.
You need to source your own flywheel, I just grabbed one off an old Mk3 Golf ABF engine and had the work done, the lightening is around £70 including post to and from the guy thats does the work on ClubGTI.
So if you find a cheap flywheel, you can have a better system than even uprated clutch kits for under £350.
