just get a power flow exhaust, what, £300 and cams another £300 and you should be there or thereabouts without getting totally reamed by the dealer?
Not really comparable imho.
Some press release said:
The Mountune Performance Stage 1 package will retail at £1,435 (plus fitting) and consists of a high-flow air induction system, a high performance exhaust system including high flow catalyst and tubular manifold, and re-calibration of Ford’s potent 2.0-litre Duratec ST engine to produce 165PS.
The more powerful Mountune Performance Stage 2 package will cost £1,838 (plus fitting) and adds new camshafts and valve springs to the basic package to deliver 185PS.
Developed by Ford Team RS in a new association with Roush Technologies Ltd, which owns the Mountune Racing motorsport brand, these packages will only be available at specialist Ford dealers. The upgrades have a minimum of 12 months/12,000 miles dealer warranty up to a maximum of three years/36,000miles.
The upgrade kits do not affect the vehicle warranty and will be available from the selected Ford Dealers from March 1st 2008.
So firstly your shopping list will include:
Cat back exhaust
sports cat
sports manifold
revised induction system
ECU remap
Cams
Valve springs
Even doing it your way, 'on the cheap', you'd be looking at, what:
Cat back exhaust - £300
sports cat - £300ish
sports manifold - £300 ish
revised induction system - anything from £50 to £300 (like an ITG Maxogen)
ECU remap to suit cams - £300
Cams - £400
Valve springs - doubt they'd be changed on the cheap
Plus remember this has been developed by ford themselves, so for instance I'd have thought the exhaust would have had some decent development behind it rather than a 5 minute look under your car by the polish guy in the powerflow franchise

(for the record, I have a powerflow exhaust, and one of the guys in the powerflow place is polish

).
Only bummer is if fitting really is extra as the stage 2 package will up the costs due to the cam change.
Then there's the all important warranty, the kind of people this deal is aimed at will see this as a big selling point.
Then you have resale value, do you want your ST with aftermarket stuff thrown on or an official dealer option pack?
As I said, Subaru have been doing this for years and whilst 2k for the PPP is a lot comapred to if you did it out of a dealership, it's still a bloomin' good option
