Not sure about these mods

[Carl]

The waterpump pulley being bigger means that at the coolant does not start cavitating until higher RPM than the stock pulley..
Cavitating means that basically,instead on the pump moving the coolant around the engine,it just stay\'s still and get\'s air pockets in it because the speed of the pump is too high for it to work properly.
The light weight of the pulleys does not make much difference.
As for plug leads,I would reccomend to keep stock Mazda ones,they are very good.
And for plugs the BUR9EQP\'s are good for most cars except the really high HP ones.
Spend your money only on what is really needed.
Regards
Carl

[chrisJDM]

Thanks Carl, i think that has summed it up pretty well, there are a few other bits and pieces ive been thinking of getting which i will probably get instead, try and make everything a bit more solid, gona look at getting a gerabox brace, diff brace, and probably some solid engine mounts, might also have a look at replacing the suspension bushes with some better items, the engine mounts and suspension bushes are currently stock on a J Plate FD so are bound to be a bit worn, and also the 2nd to third gear change is getting a bit dodgy.  I think for the mo ive done as much as i want with the engine, just wana get it all set up properly, and improve handling and a few other bits and pieces.

[Warthog]

1.4!!!! Wow i had an fd set up to 1 bar and it took 4 months for them to go pop.

How long did yours last? I guess it depends on Condition and how you look after them i supose but i don\'t know many Turbo\'s that don\'t have 360 bearings to go much over 1 bar without seeing seal blow by.

I did one set of twins on the strip, they were the original ones, they lasted two years of my abuse. The next set were still going strong after 6 months when I changed to a single set up.