You may want to revaluate those prices...
Quaife - £1695 + VAT.. Thats £1991 inc VAT... Then you have about £500 worth of Nissan parts unless you want to trash your box due to the likes of a 15year old bearing failing.. That takes you to £2500.. Then you need to machine part of it to get it to fit in the case correctly.. More cost.. You can save yourself the small built cost that comes at the end though.. Hardly worth it...
PPG - For the PPG 5-Speed Dog Box its going to cost you £3100 in parts alone! Then you have the £250 delivery and £500 tax if you can't get away with it when shipping from AUS.. If you want the complete Dog Box including the Billet Final drive then its £3700 for just the parts.. Then you need to ship, tax and build the thing..
Engine Parts - Most can be bought cheap from the US.. But if you think you are going to get HKS pistons for £200 as someone suggested then you are dreaming! Mahle, CP, JE, WISCO, ROSS, ARIAS can all be bought for between £200 - £400 depending on who you know.. RNN14 HKS Pistons can be bought from the Japan for around £400 delivered.. Head Gasket, Bearings and Bolts are best bought from the UK.. They are cheap enough that you won't really save any money buying them overseas.. You could end up spending thousands on this engine depending on how far you want to go.. Pistons, Rods, Cams, Crank, Head Work, etc...
Turbo - GT3076 will give you the power you want.. HKS GT3037 will do the same but spool quicker. Will cost you a lot more too.. With these kind of setups you will want a Tubular Manifold, and External Wastegate setup.. Expect to pay anywhere from £2000 - £3000 depending on which items you buy..
Management - ECU, Injectors, Fuel System.. Emanage, PowerFC, AEM, Motec whatever you think you need. Costs vary from £300 - £3000... Then you need your Injectors, Fuel System and Sensors.. Add another £300 - £1000 depending on your chosen setup..
Cooling - FMIC, Twin Core Rad - £500 - £1000 depending on setup..
Clutch - £300 - £1500 depending on what you choose... Single or Twin Plate setup...
Thats all just to get you the power... Then you need to think about the Chasis Modifications to handle all that power.. Braces, Suspension, Brakes, etc...
There is more...
Rishi